Clink v1.2.24 Christopher Antos (renovater) Martin Ridgers (creator)

Clink combines the native Windows shell cmd.exe with the powerful command line editing features of the GNU Readline library, which provides rich completion, history, and line-editing capabilities. Readline is best known for its use in the well-known Unix shell Bash, the standard shell for Mac OS X and many Linux distributions.

### Features

• The same line editing as Bash (from the GNU Readline library version 8.1).
• History persistence between sessions.
• Context sensitive completion;
• Executables (and aliases).
• Directory commands.
• Environment variables.
• Context sensitive colored input text.
• New keyboard shortcuts;
• Paste from clipboard (Ctrl+V).
• Incremental history search (Ctrl+R and Ctrl+S).
• Powerful completion (Tab).
• Undo (Ctrl+Z).
• Automatic cd .. (Ctrl+Alt+U).
• Environment variable expansion (Ctrl+Alt+E).
• Doskey alias expansion (Ctrl+Alt+F).
• Scroll the screen buffer (Alt+Up, etc).
• Shift+Arrow keys to select text, typing replaces selected text, etc.
• (press Alt+H for many more...)
• Directory shortcuts;
• Typing a directory name followed by a path separator is a shortcut for cd /d to that directory.
• Typing .. or ... is a shortcut for cd .. or cd ..\.. (each additional . adds another \..).
• Typing - or cd - changes to the previous current working directory.
• Scriptable completion with Lua.
• Scriptable key bindings with Lua.
• Colored and scriptable prompt.
• Auto-answering of the "Terminate batch job?" prompt.

By default Clink binds Alt+H to display the current key bindings. More features can also be found in GNU's Readline and History libraries' manuals.

Want some quick but powerful tips to get started?

 Ctrl+O This is operate-and-get-next, which accepts the current input line and gets the next history line. You can search history for a command, then press Ctrl+O to run that command and queue up the next command after it. Repeat it to conveniently rerun a series of commands from the history. Alt+. This is yank-last-arg, which inserts the last argument from the previous line. You can use it repeatedly to cycle backwards through the history, inserting the last argument from each line. Learn more by reading up on the "yank" features in the Readline manual. Ctrl+R This is reverse-search-history, which incrementally searches the history. Press it, then type, and it does a reverse incremental search while you type. Press Ctrl+R again (and again, etc) to search for other matches of the search text. Learn more by reading up on the "search" and "history" features in the Readline manual. Ctrl+Alt+D This is remove-history, which deletes the currently selected history line after using any of the history search or navigation commands. Ctrl+Alt+K This is add-history, which adds the current line to the history without executing it, and then clears the input line. Ctrl+Alt+N This is clink-menu-complete-numbers, which grabs numbers with 3 or more digits from the current console screen and cycles through inserting them as completions (binary, octal, decimal, hexadecimal). Super handy for quickly inserting a commit hash that was printed as output from a preceding command. Alt+0 to Alt+9 These are digit-argument, which let you enter a numeric value used by many commands. For example Ctrl+Alt+W copies the current word to the clipboard, but if you first type Alt+2 followed by Ctrl+Alt+W then it copies the 3rd word to the clipboard (the first word is 0, the second is 1, etc). Learn more by reading up on "Readline Arguments" in the Readline manual. Alt+H This is clink-show-help, which lists the key bindings and commands. Learn more by visiting Key Bindings.

# Usage

There are several ways to start Clink.

1. If you installed the auto-run, just start cmd.exe. Run clink autorun --help for more info.
2. To manually start, run the Clink shortcut from the Start menu (or the clink.bat located in the install directory).
3. To establish Clink to an existing cmd.exe process, use <install_dir>\clink.exe inject.

When running Clink via the methods above, Clink checks the parent process is supported and injects a DLL into it. The DLL then hooks the WriteConsole() and ReadConsole() Windows functions. The former is so that Clink can capture the current prompt, and the latter hook allows Clink to provide its own Readline-powered command line editing.

### Privacy

Clink does not collect user data. Clink writes diagnostic information to its local log file, and does not transmit the log file off the local computer. For the location of the log file, refer to File Locations or run clink info.

## Startup Cmd Script

When Clink is injected, it looks for a clink_start.cmd script in the binaries directory and profile directory. Clink automatically runs the scripts, if present, when the first CMD prompt is shown after Clink is injected.

You can set the clink.autostart setting to run a different command, or set it to "nul" to run no command at all.

The easiest way to configure Clink is to use Clink's set command line option. This can list, query, and set Clink's settings. Run clink set --help from a Clink-installed cmd.exe process to learn more both about how to use it and to get descriptions for Clink's various options.

The following table describes the available Clink settings:

Name Default Description
clink.autostart This command is automatically run when the first CMD prompt is shown after Clink is injected. If this is blank (the default), then Clink instead looks for clink_start.cmd in the binaries directory and profile directory and runs them. Set it to "nul" to not run any autostart command.
clink.colorize_input True Enables context sensitive coloring for the input text (see Coloring The Input Text).
clink.paste_crlf crlf What to do with CR and LF characters on paste. Setting this to delete deletes them, space replaces them with spaces, ampersand replaces them with ampersands, and crlf pastes them as-is (executing commands that end with a newline).
clink.path A list of paths to load Lua scripts. Multiple paths can be delimited semicolons.
clink.promptfilter True Enable prompt filtering by Lua scripts.
cmd.auto_answer off Automatically answers cmd.exe's "Terminate batch job (Y/N)?" prompts. off = disabled, answer_yes = answer Y, answer_no = answer N.
cmd.ctrld_exits True Ctrl+D exits the process when it is pressed on an empty line.
cmd.get_errorlevel False When this is enabled, Clink runs a hidden echo %errorlevel% command before each interactive input prompt to retrieve the last exit code for use by Lua scripts. If you experience problems, try turning this off. This is off by default.
color.arg The color for arguments in the input line when clink.colorize_input is enabled.
color.argmatcher The color for the command name in the input line when clink.colorize_input is enabled, if the command name has an argmatcher available.
color.cmd bold Used when Clink displays shell (CMD.EXE) command completions, and in the input line when clink.colorize_input is enabled.
color.doskey bright cyan Used when Clink displays doskey alias completions, and in the input line when clink.colorize_input is enabled.
color.filtered bold The default color for filtered completions (see Filtering the Match Display).
color.flag default The color for flags in the input line when clink.colorize_input is enabled.
color.hidden Used when Clink displays file completions with the "hidden" attribute.
color.horizscroll Used when Clink displays the < or > horizontal scroll indicators when Readline's horizontal-scroll-mode variable is set.
color.input Used when Clink displays the input line text. Note that when clink.colorize_input is disabled, the entire input line is displayed using color.input.
color.interact bold Used when Clink displays text or prompts such as a pager's --More?-- prompt.
color.message default The color for the message area (e.g. the search prompt message, digit argument prompt message, etc).
color.modmark Used when Clink displays the * mark on modified history lines when Readline's mark-modified-lines variable and Clink's color.input setting are both set. Falls back to color.input if not set.
color.prompt When set, this is used as the default color for the prompt. But it's overridden by any colors set by Customising The Prompt.
color.readonly Used when Clink displays file completions with the "readonly" attribute.
color.selected_completion The color for the selected completion with the clink-select-complete command. If no color is set, then bright reverse video is used.
color.selection The color for selected text in the input line. If no color is set, then reverse video is used.
color.unexpected default The color for unexpected arguments in the input line when clink.colorize_input is enabled.
debug.log_terminal False Logs all terminal input and output to the clink.log file. This is intended for diagnostic purposes only, and can make the log file grow significantly.
doskey.enhanced True Enhanced Doskey adds the expansion of macros that follow | and & command separators and respects quotes around words when parsing $1..$9 tags. Note that these features do not apply to Doskey use in Batch files.
exec.cwd True When matching executables as the first word (exec.enable), include executables in the current directory. (This is implicit if the word being completed is a relative path).
exec.dirs True When matching executables as the first word (exec.enable), also include directories relative to the current working directory as matches.
exec.enable True Match executables when completing the first word of a line.
exec.path True When matching executables as the first word (exec.enable), include executables found in the directories specified in the %PATH% environment variable.
exec.space_prefix True If the line begins with whitespace then Clink bypasses executable matching (exec.path) and will do normal files matching instead.
files.hidden True Includes or excludes files with the "hidden" attribute set when generating file lists.
files.system False Includes or excludes files with the "system" attribute set when generating file lists.
history.dont_add_to_history_cmds exit history List of commands that aren't automatically added to the history. Commands are separated by spaces, commas, or semicolons. Default is exit history, to exclude both of those commands.
history.dupe_mode erase_prev If a line is a duplicate of an existing history entry Clink will erase the duplicate when this is set to 'erase_prev'. Setting it to 'ignore' will not add duplicates to the history, and setting it to 'add' will always add lines (except when overridden by history.sticky_search).
history.expand_mode not_quoted The ! character in an entered line can be interpreted to introduce words from the history. This can be enabled and disable by setting this value to on or off. Values of not_squoted, not_dquoted, or not_quoted will skip any ! character quoted in single, double, or both quotes respectively.
history.ignore_space True Ignore lines that begin with whitespace when adding lines in to the history.
history.max_lines 2500 The number of history lines to save if history.save is enabled (1 to 50000).
history.save True Saves history between sessions. When disabled, history is neither read from nor written to a master history list; history for each session exists only in memory until the session ends.
history.shared False When history is shared, all instances of Clink update the master history list after each command and reload the master history list on each prompt. When history is not shared, each instance updates the master history list on exit.
history.sticky_search False When enabled, reusing a history line does not add the reused line to the end of the history, and it leaves the history search position on the reused line so next/prev history can continue from there (e.g. replaying commands via Up several times then Enter, Down, Enter, etc).
lua.break_on_error False Breaks into Lua debugger on Lua errors.
lua.break_on_traceback False Breaks into Lua debugger on traceback().
lua.debug False Loads a simple embedded command line debugger when enabled. Breakpoints can be added by calling pause().
lua.path Value to append to package.path. Used to search for Lua scripts specified in require() statements.
lua.reload_scripts False When false, Lua scripts are loaded once and are only reloaded if forced (see The Location of Lua Scripts for details). When true, Lua scripts are loaded each time the edit prompt is activated.
lua.strict True When enabled, argument errors cause Lua scripts to fail. This may expose bugs in some older scripts, causing them to fail where they used to succeed. In that case you can try turning this off, but please alert the script owner about the issue so they can fix the script.
lua.traceback_on_error False Prints stack trace on Lua errors.
match.ignore_accent True Controls accent sensitivity when completing matches. For example, ä and a are considered equivalent with this enabled.
match.ignore_case relaxed Controls case sensitivity when completing matches. off = case sensitive, on = case insensitive, relaxed = case insensitive plus - and _ are considered equal.
match.sort_dirs with How to sort matching directory names. before = before files, with = with files, after = after files.
match.translate_slashes system File and directory completions can be translated to use consistent slashes. The default is system to use the appropriate path separator for the OS host (backslashes on Windows). Use slash to use forward slashes, or backslash to use backslashes. Use off to turn off translating slashes from custom match generators.
match.wild True Matches ? and * wildcards when using any of the menu-complete commands or the clink-popup-complete command. Turn this off to behave how bash does, and not match wildcards.
prompt.async True Enables asynchronous prompt refresh. Turn this off if prompt filter refreshes are annoying or cause problems.
readline.hide_stderr False Suppresses stderr from the Readline library. Enable this if Readline error messages are getting in the way.
terminal.adjust_cursor_style True When enabled, Clink adjusts the cursor shape and visibility to show Insert Mode, produce the visible bell effect, avoid disorienting cursor flicker, and to support ANSI escape codes that adjust the cursor shape and visibility. But it interferes with the Windows 10 Cursor Shape console setting. You can make the Cursor Shape setting work by disabling this Clink setting (and the features this provides).
terminal.differentiate_keys False When enabled, pressing Ctrl + H or I or M or [ generate special key sequences to enable binding them separately from Backspace or Tab or Enter or Esc.
terminal.emulation auto Clink can either emulate a virtual terminal and handle ANSI escape codes itself, or let the console host natively handle ANSI escape codes. native = pass output directly to the console host process, emulate = clink handles ANSI escape codes itself, auto = emulate except when running in ConEmu, Windows Terminal, or Windows 10 new console.
terminal.raw_esc False When enabled, pressing Esc sends a literal escape character like in Unix/etc terminals. This setting is disabled by default to provide a more predictable, reliable, and configurable input experience on Windows. Changing this only affects future Clink sessions, not the current session.
terminal.use_altgr_substitute False Support Windows' Ctrl-Alt substitute for AltGr. Turning this off may resolve collisions with Readline's key bindings.

Compatibility Notes:

• The esc_clears_line setting has been replaced by a clink-reset-line command that is by default bound to the Escape key. See Key Bindings and Readline for more information.
• The match_colour setting has been removed, and Clink now supports Readline's completion coloring. See Completion Colors for more information.

## Color Settings

### Friendly Color Names

The Clink color settings use the following syntax:

[attributes] [foreground_color] [on [background_color]]

Optional attributes (can be abbreviated to 3 letters):

• bold or nobold adds or removes boldface (usually represented by forcing the color to use high intensity if it doesn't already).
• underline or nounderline adds or removes an underline.

Optional colors for foreground_color and background_color (can be abbreviated to 3 letters):

• default or normal uses the default color as defined by the current color theme in the console window.
• black, red, green, yellow, blue, cyan, magenta, white are the basic colors names.
• bright can be combined with any of the other color names to make them bright (high intensity).

Examples (specific results may depend on the console host program):

• bri yel for bright yellow foreground on default background color.
• bold for bright default foreground on default background color.
• underline bright black on white for dark gray (bright black) foreground on light gray (white) background.
• default on blue for default foreground color on blue background.

### Alternative SGR Syntax

It's also possible to set any ANSI SGR escape code using sgr SGR_parameters (for example sgr 7 is the code for reverse video, which swaps the foreground and background colors).

Be careful, since some escape code sequences might behave strangely.

## File Locations

Settings and history are persisted to disk from session to session. The location of these files depends on which distribution of Clink was used. If you installed Clink using the .exe installer then Clink uses the current user's non-roaming application data directory. This user directory is usually found in one of the following locations;

• Windows XP: c:\Documents and Settings\<username>\Local Settings\Application Data\clink
• Windows Vista onwards: c:\Users\<username>\AppData\Local\clink

All of the above locations can be overridden using the --profile path command line option which is specified when injecting Clink into cmd.exe using clink inject. Or with the %CLINK_PROFILE% environment variable if it is already present when Clink is injected (this envvar takes precedence over any other mechanism of specifying a profile directory, if more than one was used).

You can use clink info to find the directories and configuration files for the current Clink session.

## Command Line Options

Shows command line usage help.

Injects Clink into a CMD.EXE process.
See clink inject --help for more information.

Manages Clink's entry in CMD.EXE's autorun section, which can automatically inject Clink when starting CMD.EXE.
When Clink is installed for autorun, the automatic inject can be overridden by setting the CLINK_NOAUTORUN environment variable (to any value).
See clink autorun --help for more information.

clink set by itself lists all settings and their values.
clink set setting_name describes the setting shows its current value.
clink set setting_name clear resets the setting to its default value.
clink set setting_name value sets the setting to the specified value.

Adds a path to search for Lua scripts.
The path is stored in the registry and applies to all installations of Clink, regardless where their config paths are, etc. This is intended to make it easy for package managers like Scoop to be able to install (and uninstall) scripts for use with Clink.
See clink installscripts --help for more information.

Removes a path added by clink installscripts.
See clink uninstallscripts --help for more information.

Lists the command history.
See clink history --help for more information.
Also, Clink automatically defines history as an alias for clink history.

Prints information about Clink, including the version and various configuration directories and files.
Or clink --version shows just the version number.

Echos key sequences to use in the .inputrc files for binding keys to Clink commands. Each key pressed prints the associated key sequence on a separate line, until Ctrl+C is pressed.

## Portable Configuration

Sometimes it's useful to run Clink from a flash drive or from a network share, especially if you want to use Clink on someone else's computer.

Here's how you can set up a portable configuration for Clink:

1. Put your Lua scripts and other tools in the same directory as the Clink executable files. For example fzf.exe, z.cmd, oh-my-posh.exe, or etc can all go in the same directory on a flash drive or network share.
2. Make a batch file such as portable.bat that injects Clink using a specific profile directory.
• On a flash drive, you can have a portable profile in a subdirectory under the Clink directory.
• On a network share, you'll want to copy some initial settings into a local profile directory (a profile directory on a network share will be slow).
3. In any cmd.exe window on any computer, you can then run the portable.bat script to inject Clink and have all your favorite settings and key bindings work.

Here are some sample scripts:

### portable.bat (on a flash drive)

This sample script assumes the portable.bat script is in the Clink directory, and it uses a clink_portable profile directory under the Clink directory.

@echo off
rem -- Do any other desired configuration here, such as loading a doskey macro file.
call "%~dp0clink.bat" inject --profile "%~dp0clink_portable" %1 %2 %3 %4 %5 %6 %7 %8 %9


### portable.bat (on a network share)

This sample script assumes the portable.bat script is in the Clink directory, and that there is a file portable_clink_settings with the settings you want to copy to the local profile directory.

@echo off
rem -- Do any other desired configuration here, such as loading a doskey macro file.
call "%~dp0clink.bat" inject --profile "%TEMP%\clink_portable" %1 %2 %3 %4 %5 %6 %7 %8 %9


Readline itself can also be configured to add custom keybindings and macros by creating a Readline init file. There is excellent documentation for all the options and commands available to configure Readline in Readline's manual.

Clink searches in the directories referenced by the following environment variables and loads any .inputrc or _inputrc files present, in the order listed here:

• %CLINK_INPUTRC%
• The Clink profile directory (see the "state" line from clink info).
• %USERPROFILE%
• %LOCALAPPDATA%
• %APPDATA%
• %HOME%

Configuration in files loaded earlier can be overridden by files loaded later.

Other software that also uses Readline will also look for the .inputrc file (and possibly the _inputrc file too). To set macros and keybindings intended only for Clink one can use the Readline init file conditional construct like this; $if clink [...]$endif.

You can use clink info to find the directories and configuration files for the current Clink session.

Compatibility Notes:

• The clink_inputrc_base file from v0.4.8 is no longer used.
• For backward compatibility, clink_inputrc is also loaded from the above locations, but it has been deprecated and may be removed in the future.

### Basic Format

The quick version is that mostly you'll use these kinds of lines:

• keyname: command
• keyname: "literal text"
• keyname: "luafunc:lua_function_name"
• set varname value

If a Readline macro begins with "luafunc:" then Clink interprets it as a Lua key binding and will invoke the named Lua function. Function names can include periods (such as foo.bar) but cannot include any other punctuation. See Lua Key Bindings for more information.

Refer to the Readline manual for a more thorough explanation of the .inputrc file format, list of available commands, and list of configuration variables and their values.

### New Configuration Variables

Name Default Description
completion-auto-query-items on Automatically prompts before displaying completions if they need more than half a screen page.
history-point-at-end-of-anchored-search off Puts the cursor at the end of the line when using history-search-forward or history-search-backward.
menu-complete-wraparound on The menu-complete family of commands wraps around when reaching the end of the possible completions.
search-ignore-case on Controls whether the history search commands ignore case.

### New Commands

Name Description
add-history Adds the current line to the history without executing it, and clears the editing line.
clink-complete-numbers Like complete, but for numbers from the console screen (3 digits or more, up to hexadecimal).
clink-copy-cwd Copy the current working directory to the clipboard.
clink-copy-line Copy the current line to the clipboard.
clink-copy-word Copy the word at the cursor to the clipboard, or copies the nth word if a numeric argument is provided via the digit-argument keys.
clink-ctrl-c Discards the current line and starts a new one (like Ctrl+C in CMD.EXE).
clink-diagnostics Show internal diagnostic information.
clink-exit Replaces the current line with exit and executes it (exits the shell instance).
clink-expand-doskey-alias Expand the doskey alias (if any) at the beginning of the line.
clink-expand-env-vars Expand the environment variable (e.g. %FOOBAR%) at the cursor.
clink-find-conhost Activates the "Find" dialog when running in a standard console window (hosted by the OS conhost). This is equivalent to picking "Find..." from the console window's system menu.
clink-insert-dot-dot Inserts ..\ at the cursor.
clink-mark-conhost Activates the "Mark" mode when running in a standard console window (hosted by the OS conhost). This is equivalent to picking "Mark" from the console window's system menu.
clink-menu-complete-numbers Like menu-complete, but for numbers from the console screen (3 digits or more, up to hexadecimal).
clink-menu-complete-numbers-backward Like menu-complete-backward, but for numbers from the console screen (3 digits or more, up to hexadecimal).
clink-old-menu-complete-numbers Like old-menu-complete, but for numbers from the console screen (3 digits or more, up to hexadecimal).
clink-old-menu-complete-numbers-backward Like old-menu-complete-backward, but for numbers from the console screen (3 digits or more, up to hexadecimal).
clink-paste Paste the clipboard at the cursor.
clink-popup-complete Show a popup window that lists the available completions.
clink-popup-complete-numbers Like clink-popup-complete, but for numbers from the console screen (3 digits or more, up to hexadecimal).
clink-popup-directories Show a popup window of recent current working directories. In the popup, use Enter to cd /d to the highlighted directory.
clink-popup-history Show a popup window that lists the command history (if any text precedes the cursor then it uses an anchored search to filter the list). In the popup, use Enter to execute the highlighted command.
clink-popup-show-help Show a popup window that lists the currently active key bindings, and can invoke a selected key binding. The default key binding for this is Ctrl+Alt+H.
clink-reload Reloads the .inputrc file and the Lua scripts.
clink-reset-line Clears the current line.
clink-scroll-bottom Scroll the console window to the bottom (the current input line).
clink-scroll-line-down Scroll the console window down one line.
clink-scroll-line-up Scroll the console window up one line.
clink-scroll-page-down Scroll the console window down one page.
clink-scroll-page-up Scroll the console window up one page.
clink-scroll-top Scroll the console window to the top.
clink-select-complete Like complete, but shows interactive menu of matches and responds to arrow keys and typing to filter the matches.
clink-show-help Lists the currently active key bindings using friendly key names. A numeric argument affects showing categories and descriptions: 0 for neither, 1 for categories, 2 for descriptions, 3 for categories and descriptions (the default).
clink-show-help-raw Lists the currently active key bindings using raw key sequences. A numeric argument affects showing categories and descriptions: 0 for neither, 1 for categories, 2 for descriptions, 3 for categories and descriptions (the default).
clink-up-directory Changes to the parent directory.
clink-what-is Show the key binding for the next key sequence that is input.
cua-backward-char Extends the selection and moves back a character.
cua-backward-word Extends the selection and moves back a word.
cua-beg-of-line Extends the selection and moves to the start of the current line.
cua-copy Copies the selection to the clipboard.
cua-cut Cuts the selection to the clipboard.
cua-end-of-line Extends the selection and moves to the end of the line.
cua-forward-char Extends the selection and moves forward a character.
cua-forward-word Extends the selection and moves forward a word.
old-menu-complete-backward Like old-menu-complete, but in reverse.
remove-history While searching history, removes the current line from the history.

## Completion Colors

The %LS_COLORS% environment variable provides color definitions as a series of color definitions separated by colons (:). Each definition is a either a two character type id or a file extension, followed by an equals sign and then the SGR parameters for an ANSI escape code. The two character type ids are listed below.

When the colored-completion-prefix Readline setting is configured to on, then the "so" color from %LS_COLORS% is used to color the common prefix when displaying possible completions. The default for "so" is magenta, but for example set LS_COLORS=so=90 sets the color to bright black (which shows up as a dark gray).

When colored-stats is configured to on, then the color definitions from %LS_COLORS% are used to color file completions according to their file type or extension. Multiple definitions are separated by colons. Also, since %LS_COLORS% doesn't cover readonly files, hidden files, doskey aliases, or shell commands the color.readonly, color.hidden, color.doskey, and color.cmd Clink settings exist to cover those.

Type Description Default
di Directories. 01;34 (bright blue)
ex Executable files. 01;32 (bright green)
fi Normal files.
ln Symlinks. When ln=target then symlinks are colored according to the target of the symlink. target
mi Missing file or directory.
no Normal color. This is used for anything not covered by one of the other types.
It may be overridden by various other Clink color settings as appropriate depending on the completion type.
or Orphaned symlink (the target of the symlink is missing).
so Common prefix for possible completions. 01;35 (bright magenta)

Here is an example where %LS_COLORS% defines colors for various types.

set LS_COLORS=so=90:fi=97:di=93:ex=92:*.pdf=30;105:*.md=4

• so=90 uses bright black (dark gray) for the common prefix for possible completions.
• fi=97 uses bright white for files.
• di=93 uses bright yellow for directories.
• ex=92 uses bright green for executable files.
• *.pdf=30;105 uses black on bright magenta for .pdf files.
• *.md=4 uses underline for .md files.

The clink-popup-complete, clink-popup-directories, and clink-popup-history Readline commands show a searchable popup window that lists the available completions, directory history, or command history. Here's how the popup windows work:

Key Description
Escape Cancels the popup.
Enter Inserts the highlighted completion, changes to the highlighted directory, or executes the highlighted command.
Shift+Enter Inserts the highlighted completion, inserts the highlighted directory, or jumps to the highlighted command history entry without executing it.
Ctrl+Enter Same as Shift+Enter.
Typing Typing does an incremental search.
F3 Go to the next match.
Ctrl+L Go to the next match.
Shift+F3 Go to the previous match.
Ctrl+Shift+L Go to the previous match.

Clink can be extended with Lua scripts to customize startup actions, create completion matches, customize the prompt, and more. The following sections describe these in more detail and show some examples.

## The Location of Lua Scripts

1. All directories listed in the clink.path setting, separated by semicolons.
2. If clink.path is not set, then the DLL directory and the profile directory are used (see File Locations for info about the profile directory).
3. All directories listed in the %CLINK_PATH% environment variable, separated by semicolons.
4. All directories registered by the clink installscripts command.

Lua scripts are loaded once and are only reloaded if forced because the scripts locations change, the clink-reload command is invoked (Ctrl+X,Ctrl+R), or the lua.reload_scripts setting changes (or is True).

Run clink info to see the script paths for the current session.

### Tips for starting to write Lua scripts

• Code not inside a function is executed immediately when the script is loaded.
• Usually scripts will register functions to customize various behaviors:
• Generate completion matches.
• Apply color to input text.
• Customize the prompt.
• Perform actions before or after the user gets to edit each input line.
• Provide new custom commands that can be bound to keys via the luafunc: key macro syntax.
• Often scripts will also define some functions and variables for use by itself and/or other scripts.

The following sections describe these in more detail and show some examples.

## Match Generators

These are Lua functions that are called as part of Readline's completion process (for example when pressing Tab).

First create a match generator object:

local my_generator = clink.generator(priority)


The priority argument is a number that influences when the generator gets called, with lower numbers going before higher numbers.

### The :generate() Function

Next define a match generator function on the object, taking the following form:

function my_generator:generate(line_state, match_builder)
-- Use the line_state object to examine the current line and create matches.
-- Submit matches to Clink using the match_builder object.
-- Return true or false.
end


line_state is a line object that has information about the current line.

match_builder is a builder object to which matches can be added.

If no further match generators need to be called then the function should return true. Returning false or nil continues letting other match generators get called.

Here is an example script that supplies git branch names as matches for git checkout. This example doesn't handle git aliases, but that could be added with additional script code.

local git_branch_autocomplete = clink.generator(1)

local function starts_with(str, start)
return string.sub(str, 1, string.len(start)) == start
end

local function is_checkout_ac(text)
if starts_with(text, "git checkout") then
return true
end
return false
end

local function get_branches()
-- Run git command to get branches.
local handle = io.popen("git branch -a 2>&1")
handle:close()
-- Parse the branches from the output.
local branches = {}
if starts_with(result, "fatal") == false then
for branch in string.gmatch(result, "  %S+") do
branch = string.gsub(branch, "  ", "")
table.insert(branches, branch)
end
end
end
return branches
end

function git_branch_autocomplete:generate(line_state, match_builder)
-- Check if it's a checkout command.
if not is_checkout_ac(line_state:getline()) then
return false
end
-- Get branches and add them (does nothing if not in a git repo).
local matchCount = 0
for _, branch in ipairs(get_branches()) do
matchCount = matchCount + 1
end
-- If we found branches, then stop other match generators.
return matchCount > 0
end


### The :getwordbreakinfo() Function

If needed, a generator can optionally influence word breaking for the end word by defining a :getwordbreakinfo() function.

The function takes a line_state line object that has information about the current line. If it returns nil or 0, the end word is truncated to 0 length. This is the normal behavior, which allows Clink to collect and cache all matches and then filter them based on typing. Or it can return two numbers: word break length and an optional end word length. The end word is split at the word break length: one word contains the first word break length characters from the end word (if 0 length then it's discarded), and the next word contains the rest of the end word truncated to the optional word length (0 if omitted).

A good example to look at is Clink's own built-in environment variable match generator. It has a :getwordbreakinfo() function that understands the % syntax of environment variables and produces word break info accordingly.

When the environment variable match generator's :getwordbreakinfo() function sees the end word is abc%USER it returns 3,1 so that the last two words become "abc" and "%" so that its generator knows it can do environment variable matching. But when it sees abc%FOO%def it returns 8,0 so that the last two words become "abc%FOO%" and "" so that its generator won't do environment variable matching, and also so other generators can produce matches for what follows, since "%FOO%" is an already-completed environment variable and therefore should behave like a word break. In other words, it breaks the end word differently depending on whether the number of percent signs is odd or even, to account for environent variable syntax rules.

And when an argmatcher sees the end word begins with a flag character it returns 0,1 so the end word contains only the flag character in order to switch from argument matching to flag matching.

Note: The :getwordbreakinfo() function is called very often, so it needs to be very fast or it can cause responsiveness problems while typing.

local envvar_generator = clink.generator(10)

function envvar_generator:generate(line_state, match_builder)
-- Does the word end with a percent sign?
local word = line_state:getendword()
if word:sub(-1) ~= "%" then
return false
end

-- Add env vars as matches.
for _, i in ipairs(os.getenvnames()) do
end

match_builder:setsuppressappend()   -- Don't append a space character.
match_builder:setsuppressquoting()  -- Don't quote envvars.
return true
end

function envvar_generator:getwordbreakinfo(line_state)
local word = line_state:getendword()
local in_out = false
local index = nil

-- Paired percent signs denote already-completed environment variables.
-- So use envvar completion for abc%foo%def%USER but not for abc%foo%USER.
for i = 1, #word do
if word:sub(i, i) == "%" then
in_out = not in_out
if in_out then
index = i - 1
else
index = i
end
end
end

-- If there were any percent signs, return word break info to influence the
-- match generators.
if index then
return index, (in_out and 1) or 0
end
end


#### Filtering Match Completions

A match generator or luafunc: key binding can use clink.onfiltermatches() to register a function that will be called after matches are generated but before they are displayed or inserted.

The function receives a table argument containing the matches to be displayed, a string argument indicating the completion type, and a boolean argument indicating whether filename completion is desired. The table argument has a match string field and a type string field; these are the same as in builder:addmatch().

The possible completion types are:

Type Description Example
"?" List the possible completions. possible-completions or popup-complete
"*" Insert all of the possible completions. insert-completions
"\t" Do standard completion. complete
"!" Do standard completion, and list all possible completions if there is more than one. complete (when the show-all-if-ambiguous config variable is set)
"@" Do standard completion, and list all possible completions if there is more than one and partial completion is not possible. complete (when the show-all-if-unmodified config variable is set)
"%" Do menu completion (cycle through possible completions). menu-complete or old-menu-complete

The return value is a table with the input matches filtered as desired. The match filter function can remove matches, but cannot add matches (use a match generator instead). If only one match remains after filtering, then many commands will insert the match without displaying it. This makes it possible to spawn a process (such as fzf) to perform enhanced completion by interactively filtering the matches and keeping only one selected match.

settings.add("fzf.height", "40%", "Height to use for the --height flag")
settings.add("fzf.exe_location", "", "Location of fzf.exe if not on the PATH")

-- Build a command line to launch fzf.
local function get_fzf()
local height = settings.get("fzf.height")
local command = settings.get("fzf.exe_location")
if not command or command == "" then
command = "fzf.exe"
else
command = os.getshortname(command)
end
if height and height ~= "" then
command = command..' --height '..height
end
return command
end

local fzf_complete_intercept = false

-- Sample key binding in .inputrc:
--      M-C-x: "luafunc:fzf_complete"
function fzf_complete(rl_buffer)
fzf_complete_intercept = true
rl.invokecommand("complete")
if fzf_complete_intercept then
rl_buffer:ding()
end
fzf_complete_intercept = false
rl_buffer:refreshline()
end

local function filter_matches(matches, completion_type, filename_completion_desired)
if not fzf_complete_intercept then
return
end
-- Start fzf.
local r,w = io.popenrw(get_fzf()..' --layout=reverse-list')
if not r or not w then
return
end
-- Write matches to the write pipe.
for _,m in ipairs(matches) do
w:write(m.match.."\n")
end
w:close()
local ret = {}
while (true) do
if not line then
break
end
for _,m in ipairs(matches) do
if m.match == line then
table.insert(ret, m)
end
end
end
r:close()
-- Yay, successful; clear it to not ding.
fzf_complete_intercept = false
return ret
end

function interceptor:generate(line_state, match_builder)
-- Only intercept when the specific command was used.
if fzf_complete_intercept then
end
return false
end


#### Filtering The Match Display

In some instances it may be preferable to display potential matches in an alternative form than the generated matches passed to and used internally by Readline. For example, it might be desirable to display a * next to some matches, or to show additional information about each match.

A match generator can use clink.ondisplaymatches() to register a function that will be called before matches are displayed (this is reset every time match generation is invoked).

The function receives a table argument containing the matches to be displayed, and a boolean argument indicating whether they'll be displayed in a popup window. The table argument has a match string field and a type string field; these are the same as in builder:addmatch(). The return value is a table with the input matches filtered as required by the match generator.

The returned table can also optionally include a display string field and a description string field. When present, display will be displayed instead of the match field, and description will be displayed next to the match. Putting the description in a separate field enables Clink to align the descriptions in a column.

Filtering the match display can affect completing matches: the match field is what gets inserted. It can also affect displaying matches: the display field is displayed if present, otherwise the match field is displayed.

If a match's type is "none" or its match field is different from its display field then the match is displayed using the color specified by the color.filtered Clink setting, otherwise normal completion coloring is applied. The display and description fields can include ANSI escape codes to apply other colors if desired.

local function my_filter(matches, popup)
local new_matches = {}
local magenta = "\x1b[35m"
local filtered = settings.get("color.filtered")
for _,m in ipairs(matches) do
if m.match:find("[0-9]") then
-- Ignore matches with one or more digits.
else
-- Keep the match, and also add a magenta * prefix to directory matches.
if m.type:find("^dir") then
m.display = magenta.."*"..filtered..m.match
end
table.insert(new_matches, m)
end
end
return new_matches
end

function my_match_generator:generate(line_state, match_builder)
...
end


Compatibility Note: When a match display filter has been set, it changes how match generation behaves.

• When a match display filter is set, then match generation is also re-run whenever matches are displayed.
• Normally match generation only happens at the start of a new word. The full set of potential matches is remembered and dynamically filtered based on further typing.
• So if a match generator made contextual decisions during match generation (other than filtering) then it could potentially behave differently in Clink v1.x than it did in v0.x.

## Argument Completion

Clink provides a framework for writing complex argument match generators in Lua. It works by creating a parser object that describes a command's arguments and flags and then registering the parser with Clink. When Clink detects the command is being entered on the current command line being edited, it uses the parser to generate matches.

Here is an example of a simple parser for the command foobar;

clink.argmatcher("foobar")
{ "hello", "hi" },      -- Completions for arg #1
{ "world", "wombles" }  -- Completions for arg #2
)


This parser describes a command that has two positional arguments each with two potential options. It also has two flags which the parser considers to be position independent meaning that provided the word being completed starts with a certain prefix the parser with attempt to match the from the set of flags.

On the command line completion would look something like this:

C:>foobar hello -foo wo
wombles  wonder   world
C:>foobar hello -foo wo_


When displaying possible completions, flag matches are only shown if the flag character has been input (so command  and Alt+= would list only non-flag matches, or command - and Alt+= would list only flag matches).

If a command doesn't have an argmatcher but is a doskey macro, Clink automatically expands the doskey macro and looks for an argmatcher for the expanded command. A macro like gco=git checkout $* automatically reuses a git argmatcher and produces completions for its checkout argument. However, it only expands the doskey macro up to the first $, so complex aliases like foo=app 2$gnul text$* or foo=$2$1 might behave strangely.

There are often situations where the parsing of a command's arguments is dependent on the previous words (git merge ... compared to git log ... for example). For these scenarios Clink allows you to link parsers to arguments' words using Lua's concatenation operator.

a_parser = clink.argmatcher():addarg({ "foo", "bar" })
c_parser:addarg({ "foobar" .. a_parser })   -- Arg #1 is "foobar", which has args "foo" or "bar".
c_parser:addarg({ b_parser })               -- Arg #2 is "abc" or "123".


As the example above shows, it is also possible to use a parser without concatenating it to a word.

#### Flags With Arguments

Parsers can be concatenated with flags, too.

Here's an example of a flag that takes an argument:

clink.argmatcher("git")
"resolve",
"recursive",
"ours",
"octopus",
"subtree",
})
})
})


A : or = at the end of a flag indicates the flag takes an argument but requires no space between the flag and its argument. If such a flag is not linked to a parser, then it automatically gets linked to a parser to match files. Here's an example with a few flags that take arguments without a space in between:

clink.argmatcher("findstr")
"/b", "/e", "/l", "/r", "/s", "/i", "/x", "/v", "/n", "/m", "/o", "/p", "/offline",
})


#### Functions As Argument Options

Argument options are not limited solely to strings. Clink also accepts functions too so more context aware argument options can be used.

function rainbow_function(word)
return { "red", "white", "blue" }
end



The functions take a single argument which is a word from the command line being edited (or partial word if it is the one under the cursor). Functions should return a table of potential matches.

Some built-in matcher functions are available:

Function Description

#### Shorthand

It is also possible to omit the addarg and addflags function calls and use a more declarative shorthand form:

-- Shorthand form; requires tables.
{ "one", "won" }                -- Arg #1
{ "two", "too" }                -- Arg #2
{ "-a", "-b", "/?", "/h" }      -- Flags

-- Normal form:
{ "one", "won" }                -- Arg #1
{ "two", "too" }                -- Arg #2
)
:addflags("-a", "-b", "/?", "/h")   -- Flags


With the shorthand form flags are implied rather than declared. When a shorthand table's first value is a string starting with - or / then the table is interpreted as flags. Note that it's still possible with shorthand form to mix flag prefixes, and even add additional flag prefixes, such as { '-a', '/b', '=c' }.

## Coloring The Input Text

When the clink.colorize_input setting is enabled, argmatcher automatically apply colors to the input text by parsing it.

It's possible for an argmatcher to provide a function to override how its arguments are colored. This function is called once for each of the argmatcher's arguments.

It's also possible to register a classifier function for the whole input line. This function is very similar to a match generator; classifier functions are called in priority order, and a classifier can choose to stop the classification process.

#### Setting a classifier function in an argmatcher

In cases where an argmatcher isn't able to color the input text in the desired manner, it's possible to supply a classifier function that overrides how the argmatcher colors the input text. An argmatcher's classifier function is called once for each word the argmatcher parses, but it can classify any words (not just the word it was called for). Each argmatcher can have its own classifier function, so when there are linked argmatchers more than one function may be invoked.

Words are colored by classifying the words, and each classification has an associated color. See word_classifications:classifyword() for the available classification codes.

The clink set command has different syntax depending on the setting type, so the argmatcher for clink needs help in order to get everything right. A custom generator function parses the input text to provide appropriate matches, and a custom classifier function applies appropriate coloring.

-- In this example, the argmatcher matches a directory as the first argument and
-- a file as the second argument.  It uses a word classifier function to classify
-- directories (words that end with a path separator) as "unexpected" in the
-- second argument position.

local function classify_handler(arg_index, word, word_index, line_state, classifications)
-- arg_index is the argument position in the argmatcher.
-- In this example only position 2 needs special treatent.
if arg_index ~= 2 then
return
end

-- arg_index is the argument position in the argmatcher.
-- word_index is the word position in the line_state.
-- Ex1: in samp dir file for the word dir the argument index is 1 and
-- the word index is 2.
-- Ex2: in samp --help dir file for the word dir the argument index is
-- still 1, but the word index is 3.

-- word is the word the classifier function was called for and word_index
-- is its position in the line.  Because line_state is also provided, the
-- function can examine any words in the input line.
if word:sub(-1) == "\\" then
-- The word appears to be a directory, but this example expects only
-- files in argument position 2.  Here the word gets classified as "n"
-- (unexpected) so it gets colored differently.
classifications:classifyword(word_index, "n")
end
end

:setclassifier(classify_handler)


#### Setting a classifier function for the whole input line

In some cases it may be desireable to use a custom classifier to apply coloring in an input line.

First create a classifier object:

local my_classifier = clink.classifier(priority)


The priority argument is a number that influences when the classifier gets called, with lower numbers going before higher numbers.

Next define a classify function on the object, taking the following form:

function my_classifier:classify(commands)
-- commands is a table of { line_state, classifications } objects, one per
-- command in the input line.  For example, "echo hello & echo world" is two
-- commands:  "echo hello" and "echo world".
end


commands is a table of tables, with the following scheme: { {line_state:line, classifications:word_classifications}, ... }.

If no further classifiers need to be called then the function should return true. Returning false or nil continues letting other classifiers get called.

-- In this example, a custom classifier applies colors to command separators and
-- redirection symbols in the input line.
function cmdsep_classifier:classify(commands)
-- The classifications:classifyword() method can only affect the words for
-- the corresponding command.  However, this example doesn't need to parse
-- words within commands, it just wants to parse the whole line.  And since
-- each command's classifications:applycolor() method can apply color
-- anywhere in the entire input line, this example can simply use the first
-- command's classifications object.
if commands[1] then
local line_state = commands[1].line_state
local classifications = commands[1].classifications
local line = line_state:getline()
local quote = false
local i = 1
while (i <= #line) do
local c = line:sub(i,i)
if c == '^' then
i = i + 1
elseif c == '"' then
quote = not quote
elseif quote then
elseif c == '&' or c == '|' then
classifications:applycolor(i, 1, "95")
elseif c == '>' or c == '<' then
classifications:applycolor(i, 1, "35")
if line:sub(i,i+1) == '>&' then
i = i + 1
classifications:applycolor(i, 1, "35")
end
end
i = i + 1
end
end
end


## Customising The Prompt

Before Clink displays the prompt it filters the prompt through Lua so that the prompt can be customised. This happens each and every time that the prompt is shown which allows for context sensitive customisations (such as showing the current branch of a git repository).

Writing a prompt filter is straightforward:

1. Create a new prompt filter by calling clink.promptfilter() along with a priority id which dictates the order in which filters are called. Lower priority ids are called first.
2. Define a :filter() function on the returned prompt filter.

The filter function takes a string argument that contains the filtered prompt so far. If the filter function returns nil, it has no effect. If the filter function returns a string, that string is used as the new filtered prompt (and may be further modified by other prompt filters with higher priority ids). If the filter function returns a string and a boolean, then if the boolean is false the prompt filtering is done and no further filter functions are called.

local p = clink.promptfilter(30)
function p:filter(prompt)
return "new prefix "..prompt.." new suffix" -- Add ,false to stop filtering.
end


The following example illustrates setting the prompt, modifying the prompt, using ANSI escape code for colors, running a git command to find the current branch, and stopping any further processing.

local green  = "\x1b[92m"
local yellow = "\x1b[93m"
local cyan   = "\x1b[36m"
local normal = "\x1b[m"

-- A prompt filter that discards any prompt so far and sets the
-- prompt to the current working directory.  An ANSI escape code
-- colors it yellow.
function cwd_prompt:filter(prompt)
return yellow..os.getcwd()..normal
end

-- A prompt filter that inserts the date at the beginning of the
-- the prompt.  An ANSI escape code colors the date green.
function date_prompt:filter(prompt)
return green..os.date("%a %H:%M")..normal.." "..prompt
end

-- A prompt filter that may stop further prompt filtering.
-- This is a silly example, but on Wednesdays, it stops the
-- filtering, which in this example prevents git branch
-- detection and the line feed and angle bracket.
function wednesday_silliness:filter(prompt)
if os.date("%a") == "Wed" then
-- The ,false stops any further filtering.
return prompt.." HAPPY HUMP DAY! ", false
end
end

-- A prompt filter that appends the current git branch.
function git_branch_prompt:filter(prompt)
local line = io.popen("git branch --show-current 2>nul"):read("*a")
local branch = line:match("(.+)\n")
if branch then
return prompt.." "..cyan.."["..branch.."]"..normal
end
end

-- A prompt filter that adds a line feed and angle bracket.
function bracket_prompt:filter(prompt)
return prompt.."\n> "
end


The resulting prompt will look like this:

Wed 12:54 c:\dir [master]
> _


...except on Wednesdays, when it will look like this:

Wed 12:54 c:\dir HAPPY HUMP DAY! _


### ANSI escape codes in the prompt string

Readline needs to be told which characters in the prompt are unprintable or invisible. To help with that, Clink automatically detects most standard ANSI escape codes (and most of ConEmu's non-standard escape codes) and the BEL character (^G, audible bell) and surrounds them with \001 (^A) and \002 (^B) characters. For any other unprintable characters, the \001 and \002 characters need to be added manually. Otherwise Readline misinterprets the length of the prompt and can display the prompt and input line incorrectly in some cases (especially if the input line wraps onto a second line).

#### Right Side Prompt

In addition to the normal prompt filtering, Clink can also show a prompt on the right side of the first line of input. The right side prompt defaults to the value of the %CLINK_RPROMPT% environment variable, if set, otherwise it is blank. This right side prompt is automatically hidden if the input line text reaches it.

The right side prompt can be filtered through Lua just like the normal prompt can be. Simply define a :rightfilter() function on the prompt filter returned by a call to clink.promptfilter(). A prompt filter can define both :filter() and :rightfilter(), or can define only :filter().

The :rightfilter() function works the same as the :filter() function, except that it operates on the right side prompt. It takes a string argument that contains the filtered right side prompt so far. If the rightfilter function returns nil, it has no effect. If the rightfilter function returns a string, that string is used as the new filtered right side prompt (and may be further modified by other prompt filters with higher priority ids). If either the rightfilter function or the normal filter function returns a string and a boolean, then if the boolean is false the prompt filtering is done and no further filter functions are called.

This example modifies the right side prompt by prepending the current date:

local p = clink.promptfilter(30)
function p:filter(prompt)
-- The :filter() function must be defined.  But if the prompt filter is
-- only interested in modifying the right side prompt, then the :filter()
-- function may do nothing.
end
function p:rightfilter(prompt)
local sep = #prompt > 0 and "  " or ""
return os.date()..sep..prompt
end


Note: If the console font and encoding are mismatched, or if some kinds of emoji are present, then the right side prompt might show up positioned incorrectly. If that happens, try adjusting the font or encoding (e.g. sometimes running chcp utf-8 can resolve positioning issues).

#### Asynchronous Prompt Filtering

Prompt filtering needs to be fast, or it can interfere with using the shell (e.g. git status can be slow in a large repo).

Clink provides a way for prompt filters to do some initial work and set the prompt, continue doing work in the background, and then refresh the prompt again when the background work is finished. This is accomplished by using Lua coroutines, but Clink simplifies and streamlines the process.

A prompt filter can call clink.promptcoroutine(my_func) to run my_func() inside a coroutine. Clink will automatically resume the coroutine repeatedly while input line editing is idle. When my_func() completes, Clink will automatically refresh the prompt by triggering prompt filtering again.

Typically the motivation to use asynchronous prompt filtering is that one or more io.popen("some slow command") calls take too long. They can be replaced with io.popenyield() calls inside the prompt coroutine to let them run in the background.

Global data: If my_func() needs to use any global data, then it's important to use clink.onbeginedit() to register an event handler that can reset the global data for each new input line session. Otherwise the data may accidentally "bleed" across different input line sessions.

Backward compatibility: A prompt filter must handle backward compatibility itself if it needs to run on versions of Clink that don't support asynchronous prompt filtering (v1.2.9 and lower). E.g. you can use if clink.promptcoroutine then to test whether the API exists.

The following example illustrates running git status in the background. It also remembers the status from the previous input line, so that it can reduce flicker by using the color from last time until the background status operation completes.

local prev_dir      -- Most recent git repo visited.
local prev_info     -- Most recent info retrieved by the coroutine.

local function get_git_dir(dir)
-- Check if the current directory is in a git repo.
local child
repeat
if os.isdir(path.join(dir, ".git")) then
return dir
end
-- Walk up one level to the parent directory.
dir,child = path.toparent(dir)
-- If child is empty, we've reached the top.
until (not child or child == "")
return nil
end

local function get_git_branch()
-- Get the current git branch name.
local file = io.popen("git branch --show-current 2>nul")
file:close()
return branch
end

local function get_git_status()
-- The io.popenyield API is like io.popen, but it yields until the output is
local file = io.popenyield("git --no-optional-locks status --porcelain 2>nul")
local status = false
for line in file:lines() do
-- If there's any output, the status is not clean.  Since this example
-- doesn't analyze the details, it can stop once it knows there's any
-- output at all.
status = true
break
end
file:close()
return status
end

local function get_git_conflict()
-- The io.popenyield API is like io.popen, but it yields until the output is
local file = io.popenyield("git diff --name-only --diff-filter=U 2>nul")
local conflict = false
for line in file:lines() do
-- If there's any output, there's a conflict.
conflict = true
break
end
file:close()
return conflict
end

local function collect_git_info()
-- This is run inside the coroutine, which happens while idle while waiting
-- for keyboard input.
local info = {}
info.status = get_git_status()
info.conflict = get_git_conflict()
-- Until this returns, the call to clink.promptcoroutine() will keep
-- returning nil.  After this returns, subsequent calls to
-- clink.promptcoroutine() will keep returning this return value, until a
-- new input line begins.
return info
end

function git_prompt:filter(prompt)
-- Do nothing if not a git repo.
local dir = get_git_dir(os.getcwd())
if not dir then
return
end
-- Reset the cached status if in a different repo.
if prev_dir ~= dir then
prev_info = nil
prev_dir = dir
end
-- Do nothing if git branch not available.  Getting the branch name is fast,
-- so it can run outside the coroutine.  That way the branch name is visible
-- even while the coroutine is running.
local branch = get_git_branch()
if not branch or branch == "" then
return
end
-- Start a coroutine to collect various git info in the background.  The
-- clink.promptcoroutine() call returns nil immediately, and the
-- coroutine runs in the background.  After the coroutine finishes, prompt
-- filtering is triggered again, and subsequent clink.promptcoroutine()
-- calls from this prompt filter immediately return whatever the
-- collect_git_info() function returned when it completed.  When a new input
-- line begins, the coroutine results are reset to nil to allow new results.
-- If no status yet, use the status from the previous prompt.
if info == nil then
info = prev_info or {}
else
prev_info = info
end
-- Choose color for the git branch name:  green if status is clean, yellow
-- if status is not clean, red if conflict is present, or default color if
-- status isn't known yet.
local sgr = "37;1"
if info.conflict then
sgr = "31;1"
elseif info.status ~= nil then
sgr = info.status and "33;1" or "32;1"
end
-- Prefix the prompt with "[branch]" using the status color.
return "\x1b["..sgr.."m["..branch.."]\x1b[m  "..prompt
end


# Miscellaneous

## Key bindings

Here is the quick version:

• A key binding is name: function or name: "literal text".
• Key names are like this:
• C-a and "\C-a" are both Ctrl+a.
• M-a and "\M-a" are both Alt+a.
• M-C-a and "\M-\C-a" are both Alt+Ctrl+a.
• hello is just h; the ello is a syntax error and is silently discarded by Readline.
• "hello" is the series of keys h,e,l,l,o.
• Special keys like Up are represented by VT220 escape codes such as"\e[A" (see Binding Special Keys for more info).
• Key bindings can be either functions or macros (literal text):
• blah-blah binds to a function named "blah-blah".
• "blah-blah" inserts the literal text "blah-blah".

You can use clink info to find the directories and configuration files for the current Clink session.

Here is an example .inputrc file with the key bindings that I use myself:

$if clink # begin clink-only section # The following key bindings are for emacs mode. set keymap emacs # Completion key bindings. "\t": old-menu-complete # Tab "\e[Z": old-menu-complete-backward # Shift+Tab "\e[27;5;9~": clink-popup-complete # Ctrl+Tab (ConEmu needs additional configuration to allow Ctrl+Tab) "\x1b[27;5;32~": complete # Ctrl+Space # Some key bindings I got used to from 4Dos/4NT/Take Command. C-b: # Ctrl+B (cleared because I redefined Ctrl+F) C-d: remove-history # Ctrl+D (replaces delete-char) C-f: clink-expand-doskey-alias # Ctrl+F (replaces forward-char) C-k: add-history # Ctrl+K (replaces kill-line) "\e[A": history-search-backward # Up (replaces previous-history) "\e[B": history-search-forward # Down (replaces next-history) "\e[5~": clink-popup-history # PgUp (replaces history-search-backward) "\e[6~": # PgDn (cleared because I redefined PgUp) "\e[1;5F": end-of-line # Ctrl+End (replaces kill-line) "\e[1;5H": beginning-of-line # Ctrl+Home (replaces backward-kill-line) # Some key bindings handy in default (conhost) console windows. M-b: # Alt+B (cleared because I redefined Alt+F) M-f: clink-find-conhost # Alt+F for "Find..." from the console's system menu M-m: clink-mark-conhost # Alt+M for "Mark" from the console's system menu # Some key bindings for interrogating the Readline configuration. "\C-x\C-f": dump-functions # Ctrl+X, Ctrl+F "\C-x\C-m": dump-macros # Ctrl+X, Ctrl+M "\C-x\C-v": dump-variables # Ctrl+X, Ctrl+V # Misc other key bindings. "\e[5;6~": clink-popup-directories # Ctrl+Shift+PgUp C-_: kill-line # Ctrl+- (replaces undo)$endif              # end clink-only section


The clink-show-help command is bound to Alt+H and lists all currently active key bindings. The list displays "friendly" key names, and these names are generally not suitable for use in .inputrc files. For example "Up" is the friendly name for "\e[A", and "A-C-F2" is the friendly name for "\e\e[1;5Q". To see key sequence strings suitable for use in .inputrc files use clink echo or Alt+Shift+H.

Note: Third party console hosts such as ConEmu may have their own key bindings that supersede Clink. They usually have documentation for how to change or disable their key bindings to allow console programs to handle the keys instead.

Clink provides an easy way to find the key sequence for any key combination that Clink supports. Run clink echo and then press key combinations; the associated key binding sequence is printed to the console output and can be used for a key binding in the inputrc file.

A chord can be formed by concatenating multiple key binding sequences. For example, "\C-X" and "\e[H" can be concatenated to form "\C-X\e[H" representing the chord Ctrl+X,Home.

### Binding special keys

Here is a table of the key binding sequences for the special keys. Clink primarily uses VT220 emulation for keyboard input, but also uses some Xterm extended key sequences.

Normal Shift Ctrl Ctrl+Shift Alt Alt+Shift Alt+Ctrl Alt+Ctrl+Shift
Up \e[A \e[1;2A \e[1;5A \e[1;6A \e[1;3A \e[1;4A \e[1;7A \e[1;8A
Down \e[B \e[1;2B \e[1;5B \e[1;6B \e[1;3B \e[1;4B \e[1;7B \e[1;8B
Left \e[D \e[1;2D \e[1;5D \e[1;6D \e[1;3D \e[1;4D \e[1;7D \e[1;8D
Right \e[C \e[1;2C \e[1;5C \e[1;6C \e[1;3C \e[1;4C \e[1;7C \e[1;8C
Insert \e[2~ \e[2;2~ \e[2;5~ \e[2;6~ \e[2;3~ \e[2;4~ \e[2;7~ \e[2;8~
Delete \e[3~ \e[3;2~ \e[3;5~ \e[3;6~ \e[3;3~ \e[3;4~ \e[3;7~ \e[3;8~
Home \e[H \e[1;2H \e[1;5H \e[1;6H \e[1;3H \e[1;4H \e[1;7H \e[1;8H
End \e[F \e[1;2F \e[1;5F \e[1;6F \e[1;3F \e[1;4F \e[1;7F \e[1;8F
PgUp \e[5~ \e[5;2~ \e[5;5~ \e[5;6~ \e[5;3~ \e[5;4~ \e[5;7~ \e[5;8~
PgDn \e[6~ \e[6;2~ \e[6;5~ \e[6;6~ \e[6;3~ \e[6;4~ \e[6;7~ \e[6;8~
Tab \t \e[Z \e[27;5;9~ \e[27;6;9~ - - - -
Space Space - \e[27;5;32~ \e[27;6;32~ - - \e[27;7;32~ \e[27;8;32~
Backspace ^h \e[27;2;8~ Rubout \e[27;6;8~ \e^h \e[27;4;8~ \eRubout \e[27;8;8~
F1 \eOP \e[1;2P \e[1;5P \e[1;6P \e\eOP \e\e[1;2P \e\e[1;5P \e\e[1;6P
F2 \eOQ \e[1;2Q \e[1;5Q \e[1;6Q \e\eOQ \e\e[1;2Q \e\e[1;5Q \e\e[1;6Q
F3 \eOR \e[1;2R \e[1;5R \e[1;6R \e\eOR \e\e[1;2R \e\e[1;5R \e\e[1;6R
F4 \eOS \e[1;2S \e[1;5S \e[1;6S \e\eOS \e\e[1;2S \e\e[1;5S \e\e[1;6S
F5 \e[15~ \e[15;2~ \e[15;5~ \e[15;6~ \e\e[15~ \e\e[15;2~ \e\e[15;5~ \e\e[15;6~
F6 \e[17~ \e[17;2~ \e[17;5~ \e[17;6~ \e\e[17~ \e\e[17;2~ \e\e[17;5~ \e\e[17;6~
F7 \e[18~ \e[18;2~ \e[18;5~ \e[18;6~ \e\e[18~ \e\e[18;2~ \e\e[18;5~ \e\e[18;6~
F8 \e[19~ \e[19;2~ \e[19;5~ \e[19;6~ \e\e[19~ \e\e[19;2~ \e\e[19;5~ \e\e[19;6~
F9 \e[20~ \e[20;2~ \e[20;5~ \e[20;6~ \e\e[20~ \e\e[20;2~ \e\e[20;5~ \e\e[20;6~
F10 \e[21~ \e[21;2~ \e[21;5~ \e[21;6~ \e\e[21~ \e\e[21;2~ \e\e[21;5~ \e\e[21;6~
F11 \e[23~ \e[23;2~ \e[23;5~ \e[23;6~ \e\e[23~ \e\e[23;2~ \e\e[23;5~ \e\e[23;6~
F12 \e[24~ \e[24;2~ \e[24;5~ \e[24;6~ \e\e[24~ \e\e[24;2~ \e\e[24;5~ \e\e[24;6~

When the terminal.differentiate_keys setting is enabled then the following key bindings are also available:

Ctrl Ctrl+Shift Alt Alt+Shift Alt+Ctrl Alt+Ctrl+Shift
H \e[27;5;72~ \e[27;6;72~ \eh \eH \e[27;7;72~ \e[27;8;72~
I \e[27;5;73~ \e[27;6;73~ \ei \eI \e[27;7;73~ \e[27;8;73~
M \e[27;5;77~ \e[27;6;77~ \em \eM \e[27;7;77~ \e[27;8;77~
[ \e[27;5;219~ \e[27;6;219~ \e[27;3;219~ \e[27;4;219~ \e[27;7;219~ \e[27;8;219~

The terminal.raw_esc setting controls the binding sequence for the Esc key:

terminal.raw_esc Setting Value Key Binding Sequence
False (the default) \e[27;27~
True (replicate Unix terminal input quirks and issues) \e

### Lua Key Bindings

You can bind a key to a Lua function by binding it to a macro that begins with "luafunc:". Clink will invoke the named Lua function when the key binding is input. Function names can include periods (such as foo.bar) but cannot include any other punctuation.

Lua functions can print output, but should first call rl_buffer:beginoutput so that the output doesn't overwrite the displayed input line.

Example of a Lua function key binding in a .inputrc file:

M-C-y:      "luafunc:insert_date"
M-C-z:      "luafunc:print_date"


Example functions to go with that:

function insert_date(rl_buffer)
rl_buffer:insert(os.date("%x %X"))
end

function print_date(rl_buffer)
rl_buffer:beginoutput()
print(os.date("%A %B %d, %Y   %I:%M %p"))
end


## Saved Command History

Clink has a list of commands from the current session, and it can be saved and loaded across sessions.

A line won't be added to history if either of the following are true:

• The first word in the line matches one of the words in the history.dont_add_to_history_cmds setting.
• The line begins with a space character.

To prevent doskey alias expansion while still adding the line to history, you can start the line with a semicolon.

Line Description
somecmd Expands doskey alias and adds to history.
 somecmd Doesn't expand doskey alias and doesn't add to history.
;somecmd Doesn't expand doskey alias but does add to history.

### The master history file

When the history.saved setting is enabled, then the command history is loaded and saved as follows (or when the setting is disabled, then it isn't saved between sessions).

Every time a new input line starts, Clink reloads the master history list and prunes it not to exceed the history.max_lines setting.

For performance reasons, deleting a history line marks the line as deleted without rewriting the history file. When the number of deleted lines gets too large (exceeding the max lines or 200, whichever is larger) then the history file is compacted: the file is rewritten with the deleted lines removed.

You can force the history file to be compacted regardless of the number of deleted lines by running history compact.

### Shared command history

When the history.shared setting is enabled, then all instances of Clink update the master history file and reload it every time a new input line starts. This gives the effect that all instances of Clink share the same history -- a command entered in one instance will appear in other instances' history the next time they start an input line.

When the setting is disabled, then each instance of Clink loads the master file but doesn't append its own history back to the master file until after it exits, giving the effect that once an instance starts its history is isolated from other instances' history.

### Multiple master history files

Normally Clink saves a single saved master history list. All instances of Clink load and save the same master history list.

It's also possible to make one or more instances of Clink use a different saved master history list by setting the %CLINK_HISTORY_LABEL% environment variable. This can be up to 32 alphanumeric characters, and is appended to the master history file name. Changing the %CLINK_HISTORY_LABEL% environment variable takes effect at the next input line.

## Sample Scripts

Here are a few samples of what can be done with Clink.

The clink-completions collection of scripts has a bunch of argument matchers and completion generators for things like git, mercurial, npm, and more.

### cmder-powerline-prompt

The cmder-powerline-prompt collection of scripts provides a Powerline-like prompt for Clink. It's extensible so you can add your own segments, and some configuration of built-in segments is also available.

### oh-my-posh

The oh-my-posh program can generate fancy prompts. Refer to its documentation for how to configure it.

Integrating oh-my-posh with Clink is easy: just save the following text to an oh-my-posh.lua file in your Clink scripts directory (run clink info to find that), and make sure the oh-my-posh.exe program is in a directory listed in the %PATH% environment variable. (Or edit the script below to provide a fully qualified path to the oh-my-posh.exe program.)

-- oh-my-posh.lua
function ohmyposh_prompt:filter(prompt)
return prompt, false
end


### z.lua

The z.lua tool is a faster way to navigate directories, and it integrates with Clink.

The new Clink tries to be as backward compatible with Clink v0.4.9 as possible. However, in some cases upgrading may require a little bit of configuration work.

• Some key binding sequences have changed; see Key Bindings for more information.
• Match coloring is now done by Readline and is configured differently; see Completion Colors for more information.
• Settings and history should migrate automatically if the new clink_settings and clink_history files don't exist (deleting them will cause migration to happen again). To find the directory that contains these files, run clink info and look for the "state" line.
• Script compatibility should be very good, but some scripts may still encounter problems. If you do encounter a compatibility problem you can look for an updated version of the script, update the script yourself, or visit the repo and open an issue describing details about the compatibility problem.
• Some settings have changed slightly, and there are many new settings. See Configuring Clink for more information.

## Troubleshooting Tips

If something seems to malfunction, here are some things to try that often help track down what's going wrong:

• Check clink info. E.g. does the state dir look right, do the script paths look right, do the inputrc files look right?
• Check clink set. E.g. do the settings look right?
• Check the clink.log file for clues (its location is reported by clink info).

When reporting an issue, please include the following which answer a bunch of commonly relevant questions and saves time:

• Please describe what was expected to happen.
• Please describe what actually happened.
• Please include the output from clink info and clink set.
• Please include the clink.log file (the location is reported by clink info).

# Lua API Reference

This section describes the Clink Lua API extensions. Also see Lua Documentation and the Lua 5.2 Manual for more information about the Lua programming language.

### API groups

##### _argmatcher
( choices...:string|table ) : self

This adds argument matches. Arguments can be a string, a string linked to another parser by the concatenation operator, a table of arguments, or a function that returns a table of arguments. See Argument Completion for more information.

local my_parser = clink.argmatcher("git")
:addarg("add", "status", "commit", "checkout")

( flags...:string ) : self

This adds flag matches. Flags are separate from arguments: When listing possible completions for an empty word, only arguments are listed. But when the word being completed starts with the first character of any of the flags, then only flags are listed. See Argument Completion for more information.

local my_parser = clink.argmatcher("git")
:addflags("-a", "-g", "-p", "--help")

( [index:integer] ) : self

This makes the parser loop back to argument position index when it runs out of positional sets of arguments (if index is omitted it loops back to argument position 1).

clink.argmatcher("xyzzy")
:addarg("zero", "cero")     -- first arg can be zero or cero
:addarg("one", "uno")       -- second arg can be one or uno
:addarg("two", "dos")       -- third arg can be two or dos
:loop(2)    -- fourth arg loops back to position 2, for one or uno, and so on

This makes the parser prevent invoking match generators. You can use it to "dead end" a parser and suggest no completions.

( func:function ) : self

This registers a function that gets called for each word the argmatcher handles, to classify the word as part of coloring the input text. See Coloring The Input Text for more information.

##### builder
( match:string|table, [type:string] ) : boolean

Adds a match. If match is a string, it's added as a match and type is the optional match type.

Or match can be a table with the following scheme: { match:string, [type:string] }. If a table element is missing the type field, then the type argument is used for that element.

If the type argument is omitted, "none" is assumed.

The match type can affect how the match is inserted, displayed, and colored:

TypeDescription
"word"Shows the whole word even if it contains slashes.
"arg"Avoids appending a space if the match ends with a colon or equal sign.
"command"Displays the match using color.cmd.
"alias"Displays the match using color.doskey.
"file"Shows only the last path component, with appropriate file coloring.
"dir"Shows only the last path component and adds a trailing path separator, with appropriate directory coloring.
"none"For backward compatibility the match is treated like "file", unless it ends with a path separator in which case it's treated like "dir".

ModifierDescription
"hidden"This can be combined with "file" or "dir" to use color.hidden (e.g. "file,hidden").

builder:addmatch("hello") -- type is "none"
builder:addmatch({ match=".git", type="dir hidden" })

( matches:table, [type:string] ) : integer, boolean

This is the equivalent of calling builder:addmatch() in a for-loop. Returns the number of matches added and a boolean indicating if all matches were added successfully.

matches can be a table of match strings, or a table of tables describing the matches.
type is used as the type when a match doesn't explicitly include a type, and is "none" if omitted.

builder:addmatches({"abc", "def"}) -- Adds two matches of type "none"
-- Same table scheme per entry here as in builder:addmatch()
{ match="remote/origin/master", type="word" },
{ match="remote/origin/topic", type="word" }
})

( [append:string] ) : nil

Sets character to append after matches. For example the set match generator uses this to append "=" when completing matches, so that completing set USER becomes set USERDOMAIN= (rather than set USERDOMAIN ).

( [state:boolean] ) : nil

Sets whether to suppress appending anything after the match except a possible closing quote. For example the env var match generator uses this.

( [state:integer] ) : nil

Sets whether to suppress quoting for the matches. Set to 0 for normal quoting, or 1 to suppress quoting, or 2 to suppress end quotes. For example the env var match generator sets this to 1 to overcome the quoting that would normally happen for "%" characters in filenames.

( [priority:integer], commands...:string ) : _argmatcher

Creates and returns a new argument matcher parser object. Use :addarg() and etc to add arguments, flags, other parsers, and more. See Argument Completion for more information.

If one command is provided and an argument matcher parser object is already associated with the command, this returns the existing parser rather than creating a new parser. Using :addarg() starts at arg position 1, making it possible to merge new args and etc into the existing parser.

( [priority:integer] ) : table

Creates and returns a new word classifier object. Define on the object a :classify() function which gets called in increasing priority order (low values to high values) when classifying words for coloring the input. See Coloring The Input Text for more information.

( word:string ) : table

You can use this function in an argmatcher to supply directory matches. This automatically handles Readline tilde completion.

-- Make "cd" generate directory matches (no files).
:addarg({ clink.dirmatches })

( word:string ) : table

You can use this function in an argmatcher to supply file matches. This automatically handles Readline tilde completion.

Argmatchers default to matching files, so it's unusual to need this function. However, some exceptions are when a flag needs to accept file matches but other flags and arguments don't, or when matches need to include more than files.

-- Make "foo --file" generate file matches, but other flags and args don't.
-- And the third argument can be a file or $stdin or$stdout.
"--help",
)
:addarg({ clink.filematches, "$stdin", "$stdout" })

( [priority:integer] ) : table

Creates and returns a new match generator object. Define on the object a :generate() function which gets called in increasing priority order (low values to high values) when generating matches for completion. See Match Generators for more information.

() : string

Returns a string indicating who Clink thinks will currently handle ANSI escape codes. This can change based on the terminal.emulation setting. This always returns "unknown" until the first edit prompt (see clink.onbeginedit()).

This can be useful in choosing what kind of ANSI escape codes to use, but it is a best guess and is not necessarily 100% reliable.

ReturnDescription
"clink"Clink is emulating ANSI support. 256 color and 24 bit color escape codes are mapped to the nearest of the 16 basic colors.
"conemu"Clink thinks ANSI escape codes will be handled by ConEmu.
"ansicon"Clink thinks ANSI escape codes will be handled by ANSICON.
"winterminal"Clink thinks ANSI escape codes will be handled by Windows Terminal.
"winconsole"Clink thinks ANSI escape codes will be handled by the default console support in Windows, but Clink detected a terminal replacement that won't support 256 color or 24 bit color.
"winconsolev2"Clink thinks ANSI escape codes will be handled by the default console support in Windows, or it might be handled by a terminal replacement that Clink wasn't able to detect.

() : string

Returns the current Clink session id.

This is needed when using io.popen() (or similar functions) to invoke clink history or clink info while Clink is installed for autorun. The popen API spawns a new CMD.exe, which gets a new Clink instance injected, so the history or info command will use the new session unless explicitly directed to use the calling session.

local c = os.getalias("clink")
local r = io.popen(c.." --session "..clink.getsession().." history")

( text:string ) : string

This API correctly converts UTF8 strings to lowercase, with international linguistic awareness.

clink.lower("Hello World") -- returns "hello world"

( func:function ) : nil

Registers func to be called when Clink's edit prompt is activated. The function receives no arguments and has no return values.

( func:function ) : nil

local function my_filter(matches, popup)
local new_matches = {}
for _,m in ipairs(matches) do
if m.match:find("[0-9]") then
-- Ignore matches with one or more digits.
else
-- Keep the match, and also add * prefix to directory matches.
if m.type:find("^dir") then
m.display = "*"..m.match
end
table.insert(new_matches, m)
end
end
return new_matches
end

function my_match_generator:generate(line_state, match_builder)
...
end

( func:function ) : nil

Registers func to be called when Clink's edit prompt ends. The function receives a string argument containing the input text from the edit prompt.

Breaking Change in v1.2.16: The ability to replace the user's input has been moved to a separate onfilterinput event.

( func:function ) : nil

Registers func to be called after Clink's edit prompt ends (it is called after the onendedit event). The function receives a string argument containing the input text from the edit prompt. The function returns up to two values. If the first is not nil then it's a string that replaces the edit prompt text. If the second is not nil and is false then it stops further onfilterinput handlers from running.

Note: Be very careful if you replace the text; this has the potential to interfere with or even ruin the user's ability to enter command lines for CMD to process.

( func:function ) : nil

Registers func to be called after Clink generates matches for completion. See Filtering Match Completions for more information.

( func:function ) : nil

Registers func to be called when Clink is injected into a CMD process. The function is called only once per session.

( title:string, items:table, [index:integer] ) : string, boolean, integer

Displays a popup list and returns the selected item. May only be used within a luafunc: key binding.

title is required and captions the popup list.

items is a table of strings to display, or a table of items with the following scheme: { {display:string, value:string, description:string}, ... }. The display field is displayed in the popup list (or if not present then value is displayed). The value field is returned if the item is chosen. The description is optional, and is displayed in a dimmed color in a second column. If it contains tab characters ("\t") the description string is split into multiple columns (up to 3).

index optionally specifies the default item (or 1 if omitted).

If the popup is canceled or an error occurs, the function returns nil.

Otherwise the 3 return values are:

• string indicating the value field from the selected item (or the display field if no value field is present).
• boolean which is true if the item was selected with Shift or Ctrl pressed.
• integer indicating the index of the selected item in the original items table.

( ... ) : nil

This works like print(), but this supports ANSI escape codes.

If the special value NONL is included anywhere in the argument list then the usual trailing newline is omitted. This can sometimes be useful particularly when printing certain ANSI escape codes.

Note: In Clink versions before v1.2.11 the clink.print() API exists (undocumented) but accepts exactly one string argument and is therefore not fully compatible with normal print() syntax. If you use fewer or more than 1 argument or if the argument is not a string, then first checking the Clink version (e.g. clink.version_encoded) can avoid runtime errors.

clink.print("\x1b[32mgreen\x1b[m \x1b[35mmagenta\x1b[m")
-- Outputs green in green, a space, and magenta in magenta.

local a = "hello"
local world = 73
-- Outputs a       hello   world   73.

-- Outputs helloworld.

( func:function ) : [return value from func]

Creates a coroutine to run the func function in the background. Clink will automatically resume the coroutine repeatedly while input line editing is idle. When the func function completes, Clink will automatically refresh the prompt by triggering prompt filtering again.

A coroutine is only created the first time each prompt filter calls this API during a given input line session. Subsequent calls reuse the already-created coroutine. (E.g. pressing Enter ends an input line session.)

The API returns nil until the func function has finished. After that, the API returns whatever the func function returned. The API returns one value; if multiple return values are needed, return them in a table.

If the prompt.async setting is disabled, then the coroutine runs to completion immediately before returning. Otherwise, the coroutine runs during idle while editing the input line. The func function receives one argument: true if it's running in the background, or false if it's running immediately.

Note: each prompt filter can have at most one prompt coroutine.

( [priority:integer] ) : table

Creates and returns a new promptfilter object that is applied in increasing priority order (low values to high values). Define on the object a :filter() function that takes a string argument which contains the filtered prompt so far. The function can return nil to have no effect, or can return a new prompt string. It can optionally stop further prompt filtering by also returning false. See Customising The Prompt for more information.

local foo_prompt = clink.promptfilter(80)
function foo_prompt:filter(prompt)
-- Insert the date at the beginning of the prompt.
return os.date("%a %H:%M").." "..prompt
end

( [mode:integer] ) : integer

This overrides how Clink translates slashes in completion matches, which is normally determined by the match.translate_slashes setting.

This is reset every time match generation is invoked, so use a generator to set this.

The mode specifies how to translate slashes when generators add matches:
ModeDescription
0No translation.
1Translate using the system path separator (backslash on Windows).
2Translate to slashes (/).
3Translate to backslashes (\).

If mode is omitted, then the function returns the current slash translation mode without changing it.

Note: Clink always generates file matches using the system path separator (backslash on Windows), regardless what path separator may have been typed as input. Setting this to 0 does not disable normalizing typed input paths when invoking completion; it only disables translating slashes in custom generators.

-- This example affects all match generators, by using priority -1 to
-- run first and returning false to let generators continue.
-- in its :generate() function and return true.
function force_slashes:generate()
return false                 -- Allow generators to continue.
end

( text:string ) : string

This API correctly converts UTF8 strings to uppercase, with international linguistic awareness.

clink.upper("Hello World") -- returns "HELLO WORLD"

string variable

The commit part of the Clink version number. For v1.2.3.a0f14d the commit part is a0f14d.

integer variable

The Clink version number encoded as a single integer following the format Mmmmpppp where M is the major part, m is the minor part, and p is the patch part of the version number.

For example, Clink v95.6.723 would be 950060723.

This format makes it easy to test for feature availability by encoding version numbers from the release notes.

integer variable

The major part of the Clink version number. For v1.2.3.a0f14d the major version is 1.

integer variable

The minor part of the Clink version number. For v1.2.3.a0f14d the minor version is 2.

integer variable

The patch part of the Clink version number. For v1.2.3.a0f14d the patch version is 3.

##### console
( text:string ) : integer

Returns the count of visible character cells that would be consumed if the text string were output to the console, accounting for any ANSI escape codes that may be present in the text.

Note: backspace characters and line endings are counted as visible character cells and will skew the resulting count.

( starting_line:integer, [text:string], [mode:string], [attr:integer], [attrs:table of integers], [mask:string] ) : integer

Searches downwards (forwards) for a line containing the specified text and/or attributes, starting at line starting_line. The matching line number is returned, or 0 if no matching line is found.

This behaves the same as console.findprevline() except that it searches in the opposite direction.

( starting_line:integer, [text:string], [mode:string], [attr:integer], [attrs:table of integers], [mask:string] ) : integer

Searches upwards (backwards) for a line containing the specified text and/or attributes, starting at line starting_line. The matching line number is returned, or 0 if no matching line is found, or -1 if an invalid regular expression is provided.

You can search for text, attributes, or both. Include the text argument to search for text, and include either the attr or attrs argument to search for attributes. If both text and attribute(s) are passed, then the attribute(s) must be found within the found text. If only attribute(s) are passed, then they must be found anywhere in the line. See console.linehascolor() for more information about the color codes.

The mode argument selects how the search behaves. To use a regular expression, pass "regex". To use a case insensitive search, pass "icase". These can be combined by separating them with a comma. The regular expression syntax is the ECMAScript syntax described here.

Any trailing whitespace is ignored when searching. This especially affects the $ (end of line) regex operator. mask is optional and can be "fore" or "back" to only match foreground or background colors, respectively. Note: Although most of the arguments are optional, the order of provided arguments is important. The following example provides a pair of find_prev_colored_line and find_next_colored_line functions. The functions can be bound to keys via the luafunc: macro syntax in a .inputrc file. They scroll the screen buffer to the previous or next line that contains "warn" or "error" colored red or yellow. local was_top local found_index local function reset_found() was_top = nil found_index = nil end -- Register for the onbeginedit event, to reset the found -- line number each time a new editing prompt begins. clink.onbeginedit(reset_found) -- Searches upwards for a line containing "warn" or "error" -- colored red or yellow. function find_prev_colored_line(rl_buffer) local height = console.getheight() local cur_top = console.gettop() local offset = math.modf((height - 1) / 2) -- For vertically centering the found line. local start if found_index == nil or cur_top ~= was_top then start = cur_top was_top = start else start = found_index end -- Only search if there's still room to scroll up. if start - offset > 1 then local match = console.findprevline(start - 1, "warn|error", "regex", {4,12,14}, "fore") if match ~= nil and match > 0 then found_index = match end end if found_index ~= nil then console.scroll("absolute", found_index - offset) was_top = console.gettop() else rl_buffer:ding() end end -- Searches downwards for a line containing "warn" or "error" -- colored red or yellow. function find_next_colored_line(rl_buffer) if found_index == nil then rl_buffer:ding() return end local height = console.getheight() local cur_top = console.gettop() local offset = math.modf((height - 1) / 2) local start if cur_top ~= was_top then start = cur_top + height - 1 was_top = cur_top else start = found_index end -- Only search if there's still room to scroll down. local bottom = console.getnumlines() if start - offset + height - 1 < bottom then local match = console.findnextline(start + 1, "warn|error", "regex", {4,12,14}, "fore") if match ~= nil and match > 0 then found_index = match end end if found_index ~= nil then console.scroll("absolute", found_index - offset) was_top = console.gettop() else rl_buffer:ding() end end () : integer Returns the number of visible lines of the console screen buffer. ( line:integer ) : string Returns the text from line number line, from 1 to console.getnumlines(). Any trailing whitespace is stripped before returning the text. () : integer Returns the total number of lines in the console screen buffer. () : string Returns the console title text. () : integer Returns the current top line (scroll position) in the console screen buffer. () : integer Returns the width of the console screen buffer in characters. ( line:integer ) : boolean Returns whether line number line uses only the default text color. ( line:integer, [attr:integer], [attrs:table of integers], [mask:string] ) : boolean Returns whether line number line contains the DOS color code attr, or any of the DOS color codes in attrs (either an integer or a table of integers must be provided, but not both). mask is optional and can be "fore" or "back" to only match foreground or background colors, respectively. The low 4 bits of the color code are the foreground color, and the high 4 bits of the color code are the background color. This refers to the default 16 color palette used by console windows. When 256 color or 24-bit color ANSI escape codes have been used, the closest of the 16 colors is used. To build a color code, add the corresponding Foreground color and the Background color values from this table: ForegroundBackgroundColor 00 Black 116 Dark Blue 232 Dark Green 348 Dark Cyan 464 Dark Red 580 Dark Magenta 696 Dark Yellow 7112 Gray 8128 Dark Gray 9144 Bright Blue 10160 Bright Green 11176 Bright Cyan 12192 Bright Red 13208 Bright Magenta 14224 Bright Yellow 15240 White ( text:string ) : string, integer Returns the input text with ANSI escape codes removed, and the count of visible character cells that would be consumed if the text were output to the console. Note: backspace characters and line endings are counted as visible character cells and will skew the resulting count. ( candidate_pattern:string, accept_pattern:string ) : table Uses the provided Lua string patterns to collect text from the current console screen and returns a table of matching text snippets. The snippets are ordered by distance from the input line. For example candidate_pattern could specify a pattern that identifies words, and accept_pattern could specify a pattern that matches words composed of hexadecimal digits. local matches = console.screengrab( "[^%w]*(%w%w[%w]+)", -- Words with 3 or more letters are candidates. "^%x+$")               -- A candidate containing only hexadecimal digits is a match.

( mode:string, amount:integer ) : integer

Scrolls the console screen buffer and returns the number of lines scrolled up (negative) or down (positive).

The mode specifies how to scroll:
ModeDescription
"line"Scrolls by amount lines; negative is up and positive is down.
"page"Scrolls by amount pages; negative is up and positive is down.
"end"Scrolls to the top if amount is negative, or to the bottom if positive.
"absolute"Scrolls to line amount, from 1 to console.getnumlines().

( title:string ) : nil

Sets the console title text.

##### io
( command:string, [mode:string] ) : file, file

Runs command and returns two file handles: a file handle for reading output from the command, and a file handle for writing input to the command.

mode can be "t" for text mode (the default if omitted) or "b" for binary mode.

If the function fails it returns nil, an error message, and an error number.

Warning This can result in deadlocks unless the command fully reads all of its input before writing any output. This is because Lua uses blocking IO to read and write file handles. If the write buffer fills (or the read buffer is empty) then the write (or read) will block and can only become unblocked if the command correspondingly reads (or writes). But the other command can easily experience the same blocking IO problem on its end, resulting in a deadlock: process 1 is blocked from writing more until process 2 reads, but process 2 can't read because it is blocked from writing until process 1 reads.

local r,w = io.popenrw("fzf.exe --height 40%")

w:write("hello\n")
w:write("world\n")
w:close()

while (true) do
if not line then
break
end
print(line)
end
r:close()

( command:string, [mode:string] ) : file

This is the same as io.popen(command, mode) except that it only supports read mode and it yields until the command has finished:

Runs command and returns a read file handle for reading output from the command. It yields until the command has finished and the complete output is ready to be read without blocking.

The mode can contain "r" (read mode) and/or either "t" for text mode (the default if omitted) or "b" for binary mode. Write mode is not supported, so it cannot contain "w".

Note: if the prompt.async setting is disabled then this turns into a call to io.popen(command, mode) instead.

local file = io.popenyield("git status")

while (true) do
if not line then
break
end
do_things_with(line)
end
file:close()

##### line
() : integer

Returns the offset to the start of the delimited command in the line that's being effectively edited. Note that this may not be the offset of the first command of the line unquoted as whitespace isn't considered for words.

-- Given the following line; abc& 123
-- where commands are separated by & symbols.
line:getcommandoffset() == 4

() : integer

Returns the position of the cursor.

() : string

Returns the last word of the line. This is the word that matches are being generated for.

Note: The returned word omits any quotes. This helps generators naturally complete "foo\"ba to "foo\bar". The raw word including quotes can be obtained using the offset and length fields from line:getwordinfo() to extract a substring from the line returned by line:getline().

line:getword(line:getwordcount()) == line:getendword()

() : string

Returns the current line in its entirety.

( index:integer ) : string

Returns the word of the line at index.

Note: The returned word omits any quotes. This helps generators naturally complete "foo\"ba to "foo\bar". The raw word including quotes can be obtained using the offset and length fields from line:getwordinfo() to extract a substring from the line returned by line:getline().

() : integer

Returns the number of words in the current line.

( index:integer ) : table

Returns a table of information about the Nth word in the line.

Note: The length refers to the substring in the line; it omits leading and trailing quotes, but includes embedded quotes. line:getword() conveniently strips embedded quotes to help generators naturally complete "foo\"ba to "foo\bar".

The table returned has the following scheme:

{
offset,  -- [integer] offset where the word starts in the line:getline() string.
length,  -- [integer] length of the word (includes embedded quotes).
quoted,  -- [boolean] indicates whether the word is quoted.
delim,   -- [string] the delimiter character, or an empty string.
alias,   -- [boolean | nil] true if the word is a doskey alias, otherwise nil.
}

##### log
( message:string ) : nil

Writes info message to the Clink log file. Use this sparingly, or it could cause performance problems or disk space problems.

##### os
( path:string ) : boolean

Changes the current directory to path and returns whether it was successful.

( src:string, dest:string ) : boolean

Copies the src file to the dest file.

( [prefix:string], [ext:string], [path:string], [mode:string] ) : file, string

Creates a uniquely named file, intended for use as a temporary file. The name pattern is "location \ prefix _ processId _ uniqueNum extension".

prefix optionally specifies a prefix for the file name and defaults to "tmp".

ext optionally specifies a suffix for the file name and defaults to "" (if ext starts with a period "." then it is a filename extension).

path optionally specifies a path location in which to create the file. The default is the system TEMP directory.

mode optionally specifies "t" for text mode (line endings are translated) or "b" for binary mode (untranslated IO). The default is "t".

When successful, the function returns a file handle and the file name.

Note: Be sure to delete the file when finished, or it will be leaked.

If the function is unable to create a file it returns nil, an error message, and an error number. For example if the directory is inaccessible, or if there are already too many files, or invalid file name characters are used, or etc.

( ... ) : nil

This works like print() but writes the output via the OS OutputDebugString() API.

This function has no effect if the lua.debug Clink setting is off.

clink.debugprint("my variable = "..myvar)

( value:string ) : string

Returns value with any %name% environment variables expanded. Names are case insensitive. Special CMD syntax is not supported (e.g. %name:str1=str2% or %name:~offset,length%).

Note: See os.getenv() for a list of special variable names.

( name:string ) : string | nil

Returns command string for doskey alias name, or nil if the named alias does not exist.

() : table

Returns doskey alias names in a table of strings.

Returns a table containing the battery status for the device, or nil if an error occurs. The returned table has the following scheme:

{
level,         -- [integer] the battery life from 0 to 100, or -1 if an
--            error occurred or there is no battery.
acpower,       -- [boolean] whether the device is connected to AC power.
charging,      -- [boolean] whether the battery is charging.
batterysaver,  -- [boolean] whether Battery Saver mode is active.
}

() : string

Returns the current directory.

( name:string ) : string | nil

Returns the value of the named environment variable, or nil if it doesn't exist.

Note: Certain environment variable names receive special treatment:

NameSpecial Behavior
"HOME"If %HOME% is not set then a return value is synthesized from %HOMEDRIVE% and %HOMEPATH%, or from %USERPROFILE%.
"ERRORLEVEL"When the cmd.get_errorlevel setting is enabled (it is off by default) this returns the most recent exit code, just like the echo %ERRORLEVEL% command displays. Otherwise this returns 0.

() : table

Returns all environment variables in a table with the following scheme: { {name:string, value:string}, ... }.

() : integer

Returns the last command's exit code, if the cmd.get_errorlevel setting is enabled (it is disabled by default). Otherwise it returns 0.

( path:string ) : string

Returns the full path name for path.

() : string

Returns the fully qualified file name of the host process. Currently only CMD.EXE can host Clink.

( path:string ) : string

Returns the long path name for path.

() : integer

Returns the CMD.EXE process ID. This is mainly intended to help with salting unique resource names (for example named pipes).

() : table

Returns dimensions of the terminal's buffer and visible window. The returned table has the following scheme:

{
bufwidth,     -- [integer] width of the screen buffer
bufheight,    -- [integer] height of the screen buffer
winwidth,     -- [integer] width of the visible window
winheight,    -- [integer] height of the visible window
}

( path:string ) : string

Returns the 8.3 short path name for path. This may return the input path if an 8.3 short path name is not available.

( globpattern:string, [extrainfo:boolean] ) : table

Collects directories matching globpattern and returns them in a table of strings.

When extrainfo is true, then the returned table has the following scheme: { {name:string, type:string}, ... }.

The type string can be "file" or "dir", and may also contain ",hidden", ",readonly", ",link", and ",orphaned" depending on the attributes (making it usable as a match type for builder:addmatch()).

Note: any quotation marks (") in globpattern are stripped.

( globpattern:string, [extrainfo:boolean] ) : table

Collects files and/or directories matching globpattern and returns them in a table of strings.

When extrainfo is true, then the returned table has the following scheme: { {name:string, type:string}, ... }.

The type string can be "file" or "dir", and may also contain ",hidden", ",readonly", ",link", and ",orphaned" depending on the attributes (making it usable as a match type for builder:addmatch()).

Note: any quotation marks (") in globpattern are stripped.

( path:string ) : boolean

Returns whether path is a directory.

( path:string ) : boolean

Returns whether path is a file.

( path:string ) : boolean

Creates the directory path and returns whether it was successful.

( src:string, dest:string ) : boolean

Moves the src file to the dest file.

( path:string ) : boolean

Removes the directory path and returns whether it was successful.

( name:string, value:string ) : boolean

Sets the name environment variable to value and returns whether it was successful.

( path:string ) : boolean

Deletes the file path and returns whether it was successful.

##### path
( path:string ) : string

path.getbasename("/foo/bar.ext")    -- returns "bar"
path.getbasename("")                -- returns ""
path.getbasename(nil)               -- returns nil

( path:string ) : nil or string

This is similar to path.toparent() but can behave differently when the input path ends with a path separator. This is the recommended API for parsing a path into its component pieces, but is not recommended for walking up through parent directories.

path.getdirectory("foo")                -- returns nil
path.getdirectory("\foo")               -- returns "\"
path.getdirectory("c:foo")              -- returns "c:"
path.getdirectory([[c:\]])              -- returns "c:\"
path.getdirectory("c:\foo")             -- returns "c:\"
path.getdirectory("c:\foo\bar")         -- returns "c:\foo"
path.getdirectory("\\foo\bar")          -- returns "\\foo\bar"
path.getdirectory("\\foo\bar\dir")      -- returns "\\foo\bar"
path.getdirectory("")                   -- returns nil
path.getdirectory(nil)                  -- returns nil

-- These split the path components differently than path.toparent().
path.getdirectory([[c:\foo\bar\]])      -- returns "c:\foo\bar"
path.getdirectory([[\\foo\bar\dir\]])   -- returns "\\foo\bar\dir"

( path:string ) : nil or string

path.getdrive("e:/foo/bar")     -- returns "e:"
path.getdrive("foo/bar")        -- returns nil
path.getdrive("")               -- returns nil
path.getdrive(nil)              -- returns nil

( path:string ) : string

path.getextension("bar.ext")    -- returns ".ext"
path.getextension("bar")        -- returns ""
path.getextension("")           -- returns ""
path.getextension(nil)          -- returns nil

( path:string ) : string

path.getname("/foo/bar.ext")    -- returns "bar.ext"
path.getname("")                -- returns ""
path.getname(nil)               -- returns nil

( path:string ) : boolean

Examines the extension of the path name. Returns true if the extension is listed in %PATHEXT%. This caches the extensions in a map so that it's more efficient than getting and parsing %PATHEXT% each time.

path.isexecext("program.exe")   -- returns true
path.isexecext("file.doc")      -- returns false
path.isexecext("")              -- returns false
path.isexecext(nil)             -- returns nil

( left:string, right:string ) : string

path.join("/foo", "bar")    -- returns "/foo\bar"
path.join("", "bar")        -- returns "bar"
path.join("/foo", "")       -- returns "/foo"
path.join(nil, "bar")       -- returns nil
path.join("/foo", nil)      -- returns nil

( path:string, [separator:string] ) : string

Cleans path by normalising separators and removing "." and ".." elements. If separator is provided it is used to delimit path elements, otherwise a system-specific delimiter is used.

path.normalise("a////b/\\/c/")  -- returns "a\b\c\"
path.normalise("")              -- returns ""
path.normalise(nil)             -- returns nil

( path:string ) : parent:string, child:string

Splits the last path component from path, if possible. Returns the result and the component that was split, if any.

This is similar to path.getdirectory() but can behave differently when the input path ends with a path separator. This is the recommended API for walking up through parent directories.

local parent,child
parent,child = path.toparent("foo")             -- returns "", "foo"
parent,child = path.toparent("\foo")            -- returns "\", "foo"
parent,child = path.toparent("c:foo")           -- returns "c:", "foo"
parent,child = path.toparent([[c:\]])           -- returns "c:\", ""
parent,child = path.toparent("c:\foo")          -- returns "c:\", "foo"
parent,child = path.toparent("c:\foo\bar")      -- returns "c:\foo", "bar"
parent,child = path.toparent("\\foo\bar")       -- returns "\\foo\bar", ""
parent,child = path.toparent("\\foo\bar\dir")   -- returns "\\foo\bar", "dir"
parent,child = path.toparent("")                -- returns "", ""
parent,child = path.toparent(nil)               -- returns nil

-- These split the path components differently than path.getdirectory().
parent,child = path.toparent([[c:\foo\bar\]])   -- returns "c:\foo", "bar"
parent,child = path.toparent([[\\foo\bar\dir\]])-- returns "\\foo\bar", "dir"

##### rl
( path:string, [force:boolean] ) : string

rl.collapsetilde("C:\Users\yourusername\Documents")

-- The return value depends on the expand-tilde configuration variable:
-- When "on", the function returns "C:\Users\yourusername\Documents".
-- When "off", the function returns "~\Documents".

-- Or when force is true, the function returns "~\Documents".

( path:string ) : string, boolean

When generating filename matches for a word, use the rl.expandtilde and rl.collapsetilde helper functions to perform tilde completion expansion according to Readline's configuration.

Use rl.expandtilde to do tilde expansion before collecting file matches (e.g. via os.globfiles). If it indicates that it expanded the string, then use rl.collapsetilde to put back the tilde before returning a match.

local result, expanded = rl.expandtilde("~\Documents")
-- expanded is true

-- This dir_matches function demonstrates efficient use of rl.expandtilde()
-- and rl.collapsetilde() to generate directory matches from the file system.
function dir_matches(match_word, word_index, line_state)
-- Expand tilde before scanning file system.
local word = line_state:getword(word_index)
local expanded
word, expanded = rl.expandtilde(word)

-- Get the directory from 'word', and collapse tilde before generating
-- matches.  Notice that collapsetilde() only needs to be called once!
local root = path.getdirectory(word) or ""
if expanded then
root = rl.collapsetilde(root)
end

local matches = {}
for _, d in ipairs(os.globdirs(word.."*", true)) do
-- Join the filename with the input directory (might have a tilde).
local dir = path.join(root, d.name)
table.insert(matches, { match = dir, type = d.type })
end
return matches
end

( raw:boolean ) : table

Returns key bindings in a table with the following scheme: { {key:string, binding:string, desc:string, category:string}, ... }.

The following example demonstrates using this function in a luafunc: key binding to invoke clink.popuplist() to show a searchable list of key bindings, and then invoke whichever key binding is selected.

function luafunc_showkeybindings(rl_buffer)
local bindings = rl.getkeybindings()
if #bindings <= 0 then
rl_buffer:refreshline()
return
end

local items = {}
for _,kb in ipairs(bindings) do
table.insert(items, { value=kb.binding, display=kb.key, description=kb.binding.."\t"..kb.desc })
end

local binding, _, index = clink.popuplist("Key Bindings", items)
rl_buffer:refreshline()
if binding then
rl.invokecommand(binding)
end
end

() : string, function

Returns two values:

• The name of the last Readline command invoked by a key binding.
• The name of the last Lua function invoked by a key binding.

If the last key binding invoked a Lua function, then the first return value is an empty string unless the Lua function used rl.invokecommand() to also internally invoke a Readline command. If the last key binding did not invoke a Lua function, then the second return value is an empty string.

local last_rl_func, last_lua_func = rl.getlastcommand()

( name:string ) : string | nil

Returns the value of the named Readline configuration variable as a string, or nil if the variable name is not recognized.

( command:string, [count:integer] ) : boolean | nil

Invokes a Readline command named command. May only be used within a luafunc: key binding.

count is optional and defaults to 1 if omitted.

Returns true if the named command succeeds, false if the named command fails, or nil if the named command doesn't exist.

Warning: Invoking more than one Readline command in a luafunc: key binding could have unexpected results, depending on which commands are invoked.

( name:string ) : boolean | nil

Returns a boolean value indicating whether the named Readline configuration variable is set to true (on), or nil if the variable name is not recognized.

( matches:table, [type:string] ) : integer, boolean

Provides an alternative set of matches for the current word. This discards any matches that may have already been collected and uses matches for subsequent Readline completion commands until any action that normally resets the matches (such as moving the cursor or editing the input line).

May only be used within a luafunc: key binding.

The syntax is the same as for builder:addmatches() with one addition: You can add a "nosort" key to the matches table to disable sorting the matches.

local matches = {}matches["nosort"] = truerl.setmatches(matches)

This function can be used by a luafunc: key binding to provide matches based on some special criteria. For example, a key binding could collect numbers from the current screen buffer (such as issue numbers, commit hashes, line numbers, etc) and provide them to Readline as matches, making it convenient to grab a number from the screen and insert it as a command line argument.

Match display filtering is also possible by using clink.ondisplaymatches() after setting the matches.

Example .inputrc key binding:

M-n:            "luafunc:completenumbers"       # Alt+N

Example Lua function:

function completenumbers()
local _,last_luafunc = rl.getlastcommand()
if last_luafunc ~= "completenumbers" then
-- Collect numbers from the screen (minimum of three digits).
-- The numbers can be any base up to hexadecimal (decimal, octal, etc).
local matches = console.screengrab("[^%w]*(%w%w[%w]+)", "^%x+") -- They're already sorted by distance from the input line. matches["nosort"] = true rl.setmatches(matches) end rl.invokecommand("old-menu-complete") end ( name:string, value:string ) : boolean Temporarily overrides the named Readline configuration variable to the specified value. The return value reports whether it was successful, or is nil if the variable name is not recognized. Note: This does not write the value into a config file. Instead it updates the variable in memory, temporarily overriding whatever is present in any config files. When config files are reloaded, they may replace the value again. ##### rl_buffer Advances the output cursor to the next line after the Readline input buffer so that subsequent output doesn't overwrite the input buffer display. Starts a new undo group. This is useful for grouping together multiple editing actions into a single undo operation. () : nil Dings the bell. If the bell-style Readline variable is visible then it flashes the cursor instead. Ends an undo group. This is useful for grouping together multiple editing actions into a single undo operation. Note: all undo groups are automatically ended when a key binding finishes execution, so this function is only needed if a key binding needs to create more than one undo group. () : integer | nil Returns any accumulated numeric argument (Alt+Digits, etc), or nil if no numeric argument has been entered. () : string Returns the current input line. () : integer Returns the cursor position in the input line. () : integer Returns the length of the input line. ( text:string ) : nil Inserts text at the cursor position in the input line. Redraws the input line. ( from:integer, to:integer ) : nil Removes text from the input line starting at cursor position from through to. Note: the input line is UTF8, and removing only part of a multi-byte Unicode character may have undesirable results. ( cursor:integer ) : integer Sets the cursor position in the input line and returns the previous cursor position. cursor can be from 1 to rl_buffer:getlength(). Note: the input line is UTF8, and setting the cursor position inside a multi-byte Unicode character may have undesirable results. ##### settings ( name:string, default:..., [short_desc:string], [long_desc:string] ) : boolean Adds a setting to the list of Clink settings and includes it in clink set. The new setting is named name and has a default value default when the setting isn't explicitly set. The type of default determines what kind of setting is added: boolean, integer, and string values add the corresponding setting type. Or if the type is table then an enum setting is added: the table defines the accepted values, and the first value is the default value. Or if it's a string type and the name starts with "color." then a color setting is added. name can't be more than 32 characters. short_desc is an optional quick summary description and can't be more than 48 characters. long_desc is an optional long description. settings.add("myscript.myabc", true, "Boolean setting") settings.add("myscript.mydef", 100, "Number setting") settings.add("myscript.myghi", "abc", "String setting") settings.add("myscript.myjkl", {"x","y","z"}, "Enum setting") settings.add("color.mymno", "bright magenta", "Color setting") ( name:string, [descriptive:boolean] ) : boolean or string or integer Returns the current value of the name Clink setting. If it's a color setting and the optional descriptive parameter is true then the user friendly color name is returned. ( name:string, value:string ) : boolean Sets the name Clink setting to value and returns whether it was successful. ##### string ( a:string, b:string ) : boolean Performs a case insensitive comparison of the strings with international linguistic awareness. This is more efficient than converting both strings to lowercase and comparing the results. ( text:string, [delims:string], [quote_pair:string] ) : table Splits text delimited by delims (or by spaces if not provided) and returns a table containing the substrings. The optional quote_pair can provide a beginning quote character and an ending quote character. If only one character is provided it is used as both a beginning and ending quote character. ( text:string ) : integer Returns a hash of the input text. ( a:string, b:string ) : integer Returns how many characters match at the beginning of the strings, or -1 if the entire strings match. This respects the match.ignore_case and match.ignore_accents Clink settings. string.matchlen("abx", "a") -- returns 1 string.matchlen("abx", "aby") -- returns 2 string.matchlen("abx", "abx") -- returns -1 ##### word_classifications ( start:integer, length:integer, color:string, [overwrite:boolean] ) : nil Applies an ANSI SGR escape code to some characters in the input line. start is where to begin applying the SGR code. length is the number of characters to affect. color is the SGR parameters sequence to apply (for example "7" is the code for reverse video, which swaps the foreground and background colors). By default the color is applied to the characters even if some of them are already colored. But if overwrite is false each character is only colored if it hasn't been yet. See Coloring The Input Text for more information. ( word_index:integer, word_class:string, [overwrite:boolean] ) : nil This classifies the indicated word so that it can be colored appropriately. The word_class is one of the following codes: CodeClassificationClink Color Setting "a"Argument; used for words that match a list of preset argument matches.color.arg or color.input "c"Shell command; used for CMD command names.color.cmd "d"Doskey alias.color.doskey "f"Flag; used for flags that match a list of preset flag matches.color.flag "o"Other; used for file names and words that don't fit any of the other classifications.color.input "n"None; used for words that aren't recognized as part of the expected input syntax.color.unexpected "m"Prefix that can be combined with another code (for the first word) to indicate the command has an argmatcher (e.g. "mc" or "md").color.argmatcher or the other code's color By default the classification is applied to the word even if the word has already been classified. But if overwrite is false the word is only classified if it hasn't been yet. See Coloring The Input Text for more information. ##### Deprecated ( [prefixes...:string] ) : self Deprecated; don't use this. See _argmatcher:addflags for more information. This overrides the default flag prefix (-). The flag prefixes are used to switch between matching arguments versus matching flags. When listing possible completions for an empty word (e.g. command _ where the cursor is at the _), only arguments are listed. And only flags are listed when the word starts with one of the flag prefixes. Each flag prefix must be a single character, but there can be multiple prefixes. This is no longer needed because :addflags() does it automatically. local my_parser = clink.argmatcher() :setflagprefix("-", "/", "+") :addflags("--help", "/?", "+mode") ( match:string ) : nil Deprecated; don't use this. See builder:addmatch for more information. This is a shim that lets clink.register_match_generator continue to work for now, despite being obsolete. ( ... ) : table Deprecated; don't use this. See clink.argmatcher for more information. Creates a new parser and adds ... to it. -- Deprecated form: local parser = clink.arg.new_parser( { "abc", "def" }, -- arg position 1 { "ghi", "jkl" }, -- arg position 2 "--flag1", "--flag2" -- flags ) -- Replace with form: local parser = clink.argmatcher() :addarg("abc", "def") -- arg position 1 :addarg("ghi", "jkl") -- arg position 2 :addflags("--flag1", "--flag2") -- flags ( cmd:string, parser:table ) : table Deprecated; don't use this. See clink.argmatcher for more information. Adds parser to the first argmatcher for cmd. This behaves similarly to v0.4.8, but not identically. The Clink schema has changed significantly enough that there is no direct 1:1 translation. Calling clink.arg.register_parser repeatedly with the same command to merge parsers is not supported anymore. -- Deprecated form: local parser1 = clink.arg.new_parser("abc", "def") local parser2 = clink.arg.new_parser("ghi", "jkl") clink.arg.register_parser("foo", parser1) clink.arg.register_parser("foo", parser2) -- Replace with new form: clink.argmatcher("foo"):addarg(parser1, parser2) -- Warning: Note that the following are NOT the same as above! -- This replaces parser1 with parser2: clink.argmatcher("foo"):addarg(parser1) clink.argmatcher("foo"):addarg(parser2) -- This uses only parser2 if/when parser1 finishes parsing args: clink.argmatcher("foo"):addarg(parser1):addarg(parser2) ( needle:string, candidate:string ) : boolean Deprecated; don't use this. See clink.generator for more information. This returns true if needle is a prefix of candidate with a case insensitive comparison. Normally in Clink v1.x and higher the needle will be an empty string because the generators are no longer responsible for filtering matches. The match pipeline itself handles that internally now. function variable Deprecated; don't use this. See builder:addmatch for more information. This is no longer used. clink.match_display_filter = function(matches) -- Transform matches. return matches end function variable Deprecated; don't use this. See clink.ondisplaymatches for more information. A match generator can set this varible to a filter function that is called before displaying matches. It is reset every time match generation is invoked. The filter function receives table argument containing the matches that are going to be displayed, and it returns a table filtered as required by the match generator. See Filtering the Match Display for more information. ( [files:boolean] ) : nil Deprecated; don't use this. See builder:addmatch for more information. This is no longer needed, because now it's inferred from the match type when adding matches. ( filter_func:function, [priority:integer] ) : table Deprecated; don't use this. See clink.promptfilter for more information. Registers a prompt filter function. The capabilities are the same as before but the syntax is changed. -- Deprecated form: function foo_prompt() clink.prompt.value = "FOO "..clink.prompt.value.." >>" --return true -- Returning true stops further filtering. end clink.prompt.register_filter(foo_prompt, 10) -- Replace with new form: local foo_prompt = clink.promptfilter(10) function foo_prompt:filter(prompt) return "FOO "..prompt.." >>" --,false -- Adding ,false stops further filtering. end ( func:function, priority:integer ) : nil Deprecated; don't use this. See clink.generator for more information. Registers a generator function for producing matches. This behaves similarly to v0.4.8, but not identically. The Clink schema has changed significantly enough that there is no direct 1:1 translation; generators are called at a different time than before and have access to more information than before. -- Deprecated form: local function match_generator_func(text, first, last) -- text is the word text. -- first is the index of the beginning of the end word. -- last is the index of the end of the end word. -- clink.add_match() is used to add matches. -- return true if handled, or false to let another generator try. end clink.register_match_generator(match_generator_func, 10) -- Replace with new form: local g = clink.generator(10) function g:generate(line_state, match_builder) -- line_state is a line object. -- match_builder:addmatch() is used to add matches. -- return true if handled, or false to let another generator try. end ( type:integer ) : nil Deprecated; don't use this. See clink.translateslashes for more information. Controls how Clink will translate the path separating slashes for the current path being completed. Values for type are; -1 - no translation 0 - to backslashes 1 - to forward slashes ( path:string ) : boolean Deprecated; don't use this. See os.globfiles for more information. Returns whether path has the hidden attribute set. table variable Deprecated; don't use this. See line for more information. This is an obsolete global variable that was set while running match generators. It has been superseded by the line type parameter passed into match generator functions when using the new clink.generator API. # Changes #### v1.2.24 • Added support for %CLINK_RPROMPT% to show a right side prompt, and for prompt filters to define a :rightfilter() function to filter the right side prompt. • Fixed clink-select-complete to not append a space after a flag that ends with : or = (e.g. /x:). #### v1.2.23 • Fixed PgUp and PgDn in the clink-select-complete command, under certain conditions where they don't navigate in the intended manner. • Cosmetic change: better key names for Enter vs Ctrl+M, and Alt+Bkspc vs Alt+Ctrl+H, depending on the terminal.differentiate_keys setting. #### v1.2.22 • Added clink-what-is command bound by default to Alt+?, which shows the key binding for the next key sequence that is input. • Added rl.getargument() function to get the accumulated Readline numeric argument, if any. For use in "luafunc:" macros. • The clink-show-help command now categorizes key bindings and shows a description for the commands. Using a numeric argument can control whether categorization and descriptions are used. • Fixed invoking clink-select-complete while it is already active, so that it doesn't lose quotes around the current match if it has quotes. • Fixed clink-show-help to list "Enter" instead of "C-m" for the Enter key. Otherwise there's no way to differentiate between Enter and Ctrl+M when the terminal.differentiate_keys setting is enabled. • Fixed the insert-comment command, which accidentally fell back to inserting # after the first prompt (that's what bash inserts, and shouldn't be used in Clink). • Fixed the dump-functions command, which accidentally didn't list UTF8 key sequences correctly. #### v1.2.21 • Fixed backwards exit codes from clink autorun commands. • Fixed alert message text on startup when debug.log_terminal is set to true. • Fixed #143; crash on start when terminal.raw_esc is true (regression introduced in v1.2.19). #### v1.2.20 • Added os.debugprint() function to print debug text via the OS OutputDebugString() API. • Enabled match completion coloring even when using match display filtering. • Fixed input of slash and backslash in non-directory completions when using the clink-select-complete command. • Fixed match display filtering in the clink-select-complete command. • Fixed match display filtering in the clink-popup-complete command. • Fixed quirk from Readline where it sometimes displays one fewer columns of matches than actually fit on the screen. #### v1.2.19 • Added clink-select-complete command which shows an interactive list of possible completions. • Added terminal emulation for CGI G, CSI s, and CSI u sequences. • Fixed column alignment for match display filtering when some characters take more than one cell to display. #### v1.2.18 • Added completions for clink installscripts and clink uninstallscripts. • Added support for Readline's coloring and marking of symlinks. • Fixed clink installscripts --help. • Fixed clink-popup-directories for directories with spaces. #### v1.2.17 • Added clink-popup-show-help command to show popup list with searchable list of key bindings and invoke the selected key binding. • Added clink.popuplist() function to show a popup list. Only usable from inside a "luafunc:" key binding. • Incremental search in the popup list window now centers the found item so items above and below it are visible. • Fixed potential internal error when a doskey alias starts with  (regression introduced in v1.2.16).
• Fixed potential infinite loop when the cmd.auto_answer setting is enabled but an error occurs while retrieving a language string (might be related to #137).

#### v1.2.16

• Breaking Change: The clink.onendedit() Lua event has been split into two separate events:
• clink.onendedit() registers a function to be called when the edit prompt ends.
• clink.onfilterinput() registers a function to be called after the edit prompt ends (and after the onendedit event is sent), and the function can replace the input text.
• Added rl.getkeybindings() function to get a table containing key bindings. The bindings can be invoked via rl.invokecommand(). For example, a "luafunc:" macro could use this to get key bindings, show an interactive list, and then invoke the selected key binding.
• Fixed #134; print() can stop working. Issue #93 can potentially happen any time redirection is used, so the fix must be applied repeatedly (not just after Clink injection).
• Fixed #119; reuse registered parsers for doskey macros.

#### v1.2.15

• Fixed #132; multiline prompt gets overwritten when resizing the terminal width (regression introduced in v1.2.14).

#### v1.2.14

• Automatically runs clink_start.cmd from the binaries directory and/or the profile directory when Clink is injected.
• Clink is able to retrieve the last exit code for use by Lua scripts.
• The new cmd.get_errorlevel setting is off by default, but when enabled it retrieves the last exit code from CMD before running Lua scripts.
• The new os.geterrorlevel() function gets the last exit code (or 0 if the setting is off).
• It works by running a hidden command line between each interactive prompt (as if you typed echo %errorlevel% yourself every second command you type). If you experience problems with this, turn it off.
• Improved refreshing the input line when resizing the terminal window. It's better than before, but there's no way to make it work perfectly because Windows can resize the terminal further while a program is already trying to respond to the terminal having been resized previously.
• Fixed #130; doskey alias completions stop working when there are many aliases.

#### v1.2.13

• Added support for linking a parser to flags ending with : or =; now completion works for the flag's argument.

#### v1.2.12

• Improved diagnostic output for coroutines (Ctrl-X,Ctrl+Z), plus more diagnostic info when the lua.debug setting is enabled.
• Fixed potential for a script error when a coroutine gets skipped due to a new prompt starting.

#### v1.2.11

• Added clink.print() function which behaves like print() but with support for ANSI escape codes (and terminal emulation), and also a NONL special argument that suppresses the usual newline at the end of the output.
• Expanded the sample code for async prompt filtering to clarify some things.
• Fixed #126; allow Esc to input literal escape character.
• The new terminal.raw_esc setting controls how Esc input works.
• Added migration for the old esc_clears_line setting.

#### v1.2.10

• Added asynchronous prompt filtering -- scripts can use this to do work in the background (e.g. git status) and refresh the prompt when finished.
• Added clink.promptcoroutine() function to allow a prompt filter to do some work in the background.
• Added io.popenyield() function to allow a coroutine to yield until the command's complete output is ready.
• Added prompt.async setting that can disable asynchronous prompt filtering if preferred.
• Log error codes for failures during clink inject.
• Clarified help text for clink autorun (per #122).
• Documentation clarifications and reorganization.
• Fixed clink and history aliases getting lost after exiting a nested Clink instance.
• Fixed some input keys accidentally handled by the OS after certain Lua code is run.
• Fixed #124; onfiltermatches() receives one fewer matches than it should.
• Fixed #123; Failed to inject (Host validation failed).
• Fixed #117; Setup causes "System Error".

#### v1.2.9

• Fixed #118; inputrc is not read from state directory (regression introduced in v1.0.0).

#### v1.2.8

• Fixed ...\ or .../ to change directories (path separator after several dots).
• Fixed /dirname/ to change directories (forward slashes when a directory is the only thing in the input line).
• Fixed #114; "Clink already loaded in process" error when autorun is installed for both Current User and All Users.
• Fixed #113; forward slash translation didn't work with the cd command.

#### v1.2.7

• Fixed #113; clink.slash_translation() had been removed (regression introduced in v1.0.0).
• The new match.translate_slashes setting controls the default behavior for slash translation for completion matches.
• The new clink.translateslashes() API can override slash translation for completion matches (and clink.slash_translation() is supported for backward compatibility).

#### v1.2.6

• Fixed tilde expansion for directory by itself; now ~\ can change the working directory to the ~ directory.
• Fixed pagination when displaying completions that take more than 1 line to display.
• Fixed inserting directory match completions when a Lua script didn't include a trailing path separator in the directory match.
• Fixed #111; .. completion is different from bash (regression introduced in v1.0.0).

#### v1.2.5

• Added os.expandenv() function to expand environment variables in a string.
• Added console.cellcount() function to count the cells a string will use when displayed.
• Added console.plaintext() function to remove ANSI escape codes from a string.
• Clink now sets %=clink.bin% that points to the Clink binaries directory. This can be particularly useful for a portable installation of Clink so that scripts can find the Clink binaries directory and construct relative paths to other nearby files.
• Clean up column alignment in --help texts.
• Fixed history.sticky_search with anchored history search.
• Fixed clink inject --profile to use correct log file name while initially injecting.
• Fixed Clink autorun to be more compatible with Cmder (Cmder #2536).

#### v1.2.4

• Added support for Shift+Arrows to select text and typing to replace selected text.
• Added optional argument to word_classifications:classifyword() and word_classifications:applycolor() to allow only applying color where another color hasn't yet been applied.
• Fixed first Up after reusing a history line so that it gets the reused history line, rather than getting the previous history line.
• Fixed add-history command to not add blank lines to history.
• Fixed rl.setmatches() (regression introduced in v1.1.26).
• Fixed input coloring for clink set and any color setting name (regression introduced in v1.2).
• Fixed potential crash with clink history --session.
• Fixed Ctrl+D when cmd.ctrld_exits is disabled; it didn't exit, but it did still discard the input line and start a new prompt.
• Fixed #107; autorun reports inject failures (regression introduced in v1.2.3).
• Fixed #106; history missing --bare option (regression introduced in v1.2.3).

#### v1.2.3

• Added history.sticky_search setting: when enabled, reusing a history line does not add the reused line to the end of the history, and it leaves the history search position on the reused line so next/prev history can continue from there (e.g. replaying commands via Up several times then Enter, Down, Enter, etc).
• Added failure reporting and logging when clink inject fails.
• Added --unique flag for use with clink history compact --unique to remove duplicate entries from the history list.
• The clink-popup-complete command now matches wildcards.
• Restored the Ctrl+Alt+U key binding from v0.4.9 (moves the current working directory up one level).
• Fixed searching for inputrc files to also search in the profile directory (regression introduced in v1.0.0).
• Fixed incremental search in the History popup list to search in reverse order (bottom to top).
• Fixed clink-popup-history to set the history search position like other history search commands do, so that it plays well with the history.sticky_search setting.

#### v1.2.2

• Added %CLINK_HISTORY_LABEL% environment variable to use a different master history file (fixes #99).

#### v1.2.1

• Added Troubleshooting Tips section in the documentation.
• Added backward compatibility for clink set with v0.4.9. Old setting names and values are not documented, but are automatically mapped to the appropriate new setting(s). This was done so that suggestions in old web sites and posts can usually continue to work, to reduce confusion and support burden.
• Fixed #97; VS2017 error C2039: 'min': is not a member of 'std'.
• Fixed #96; wrong setting string (the name of a setting was accidentally truncated).
• Fixed some slightly inaccurate/incomplete migration from old settings to new settings.

#### v1.1.49

• Added clink.classifier() to enable coloring the input line independently from argmatchers.
• Added word_classifications:applycolor() to apply SGR escape codes anywhere in the input line.
• Removed word_classifications:iswordclassified().
• Fixed the Product Version string in the binary file version resources.

#### v1.1.48

• Added clink.getansihost() function to get Clink's best guess who will process ANSI escape codes (can be useful for avoiding 256 bit and 24 bit color codes, for example).
• Added detection for being hosted in ConsoleZ.
• Fixed #20; set /p VAR="" shows the normal command prompt text instead of empty prompt text.

#### v1.1.47

• Added default key binding for Ctrl+Space to invoke old-menu-complete, which is the most similar to CMD's standard Tab behavior.
• Fixed search-ignore-case config variable to be on by default.

#### v1.1.46

• Added rl.setvariable() to temporarily override the value of a Readline config variable.
• The completion commands now also expand tilde by itself (~), in addition to tilde followed by a path separator (~\etc).
• Fixed #94; setting history.save to False also disables interactive history in subsequent sessions.

#### v1.1.45

• Fixed #93; stdout is sometimes broken by Cmder init.bat.

#### v1.1.44

• Added clink.getsession().
• Added %CLINK_NOAUTORUN% which overrides automatic inject when Clink is installed for autorun.
• Fixed #92; clink-popup-history and similar commands not working with ConEmu and Cmder (regression introduced in v1.1.25).

#### v1.1.43

• Added clink history --diag flag that prints diagnostic information while performing history operations.
• Minor optimization in clink history when printing the full list of history items.
• Fixed clink history compact so it actually performs compaction.

#### v1.1.42

• Added clink history --bare flag to omit history item numbers.
• io.popenrw() is like io.popen(), but returns both a read file handle and a write file handle (see documentation for important usage warning).
• os.createtmpfile() creates a unique named temporary file, with control over the prefix and suffix and path.
• os.getfullpathname() to get the full path name for a file.
• os.getlongpathname() to get the long path name for a file.
• os.getshortpathname() to get the 8.3 short path name (if available) for a file.
• Improved argument validation for Clink's Lua APIs. This could expose bugs in existing scripts, so there is also a lua.strict setting that can be disabled to revert back to loose argument validation.
• Updated documentation.
• Fixed clink history compact so that it forces compaction as intended.
• Fixed completion for clink set so that filename completion works in string settings.
• Fixed backwards return value from rl.invokecommand().
• Fixed console input/output modes across "luafunc:" key bindings, in case the Lua functions spawn a process that alters the console mode without restoring it.

#### v1.1.41

• Added terminal.adjust_cursor_style setting as a workaround to avoid interfering with the Windows 10 Cursor Shape console setting. There are several trade-offs, though.
• Added rl_buffer:refreshline() function to redraw the input line, e.g. in case something has written over it.
• Added os.getpid() function to get the process ID, intended mainly to help salt unique resource names.
• Added clink.onfiltermatches() so scripts can register a callback function to run after Clink generates matches and before it displays them.

#### v1.1.40

• Added a group of clink-complete-numbers commands that do completion for numbers from the console screen, bound to Ctrl+Alt+N by default.
• Added rl.getlastcommand() function that returns the name of the last command invoked by key bindings.
• Fixed sort order in Alt+H for the newly supported key bindings (that were added in v1.1.39).
• Fixed Ctrl+Space (regression introduced in v1.1.39).
• Fixed various Ctrl+Shift+whatever combinations (regression introduced in v1.1.39).
• Fixed rl.setmatches() when the input line is not empty and clink.colorize_input is enabled.

#### v1.1.39

• Added support for many more key bindings, such as Ctrl+Shift+Letter keys.
• Added terminal.differentiate_keys setting that when enabled allows binding Ctrl + H or I or M or [ separately from Backspace, Tab, Return, or Escape.
• Removed terminal.modify_other_keys setting and made it always enabled.
• Changed terminal.use_altgr_substitute to be disabled by default so that Ctrl+Alt key bindings can work by default on keyboards with AltGr.
• Changed output from clink echo so it's directly usable in the inputrc files.
• Fixed terminal.use_altgr_substitute to only affect AltGr substitute key combinations (it had always broken the RightAlt key in general on other keyboard layouts).
• Fixed a benign issue with the console input mode in clink echo.

#### v1.1.38

• Fixed #84; added terminal.use_altgr_substitute setting.

#### v1.1.37

• Fixed copy to clipboard (it never cleared the clipboard!).
• Fixed #82; added two new clink.paste_crlf modes: ampersand replaces newlines with ampersands, and crlf pastes newlines as-is and executes any commands ending in a newline.
• Fixed #69; space in the prompt disappears after enter echo: added support for CJK codepages.

#### v1.1.36

• Fixed #79; Issue with United States - international keyboard layout (regression introduced in v1.1.0).
• Fixed #78; crash when history file contains a line longer than 8192 characters (regression introduced in v1.1.2-alpha).

#### v1.1.35

• Fixed when the mark-directories inputrc variable is off (regression introduced in v1.1.1-alpha).
• Fixed Lua reading from stdin, especially in the Lua debugger (regression introduced in v1.1.25).
• Fixed exponential cost performance bug in Readline when removing duplicate matches.

#### v1.1.34

• Fixed copying to clipboard (CF_UNICODETEXT was put on the clipboard correctly, but CF_TEXT was empty and should have been omitted to let Windows automatically convert it from the Unicode text).

#### v1.1.33

• Fixed #77; with ConsoleZ scrolling does not always work.
• Fixed #76; cannot cd up multiple directories normally.

#### v1.1.32

• Added support for non-standard escape codes to set the window title or print environment variables. Depending on the terminal.emulation setting, the behavior is slightly different. When emulate Clink processes the escape codes. When native with ConEmu (and Clink) the escape codes are passed to ConEmu, except that Clink processes the environment variable codes in prompt strings. When native with other terminals, Clink preprocesses the title and environment variable escape codes in prompt strings, but passes the escape codes to the terminal outside of prompt strings.
• Fixed #67; AutoRun interferes with Cmder.

#### v1.1.31

• Fixed #74; clink gets confused by non-standard ConEmu escape codes.
• Fixed #73; exec.space_prefix and other settings defined in Lua scripts don't take effect until second input line (regression introduced in v1.1.4).

#### v1.1.30

• Fixed history compacting on x86 (regression introduced in v1.1.2-alpha).

#### v1.1.29

• Added clink installscripts and clink uninstallscripts to make it easy for package managers like Scoop to install/uninstall script packages for use with Clink. The installed script paths are stored in the registry for the current user.
• Fixed bold vs bright colors to more accurately follow generally accepted ANSI escape code conventions:
• Renamed dim to nobold for clarity (though dim is still recognized for backward compatibility).
• bold adds intensity to a non-intense color (e.g. cyan which is 36).
• nobold removes intensity added by bold (e.g. 1;36 becomes 36), but does not remove intensity from an explicit intense color (such as bright cyan which is 96).
• Fixed support for --file= flags in argmatchers.
• Fixed match display filtering on the first try for a word (regression introduced in v1.1.19).
• Fixed the clink --profile flag (regression introduced in v1.1.10).
• Fixed clink info to accurately report the script dirs (it didn't account for the clink.path setting correctly).

#### v1.1.28

• Renamed the log.rl_terminal setting to debug.log_terminal; it has already been repeatedly very useful in multiple was since it was added, so it stays.
• Fixed #70; ctrl+c not working (regression introduced in v1.1.25).

#### v1.1.27

• Added color.argmatcher setting which, when set, is used to color a command name if it has an associated argmatcher (this supersedes color.cmd, color.doskey, and color.input). By default it's not set.
• Added log.rl_terminal setting which logs all terminal input and output for Readline (this setting may be renamed or removed in the future).

#### v1.1.26

• Added rl.invokecommand() which can invoke a Readline command from inside a "luafunc:" key binding.
• Added rl.setmatches() which can override match completions from inside a "luafunc:" key binding.
• Worked around UTF8 key binding problem with Readline which had been causing some meta key bindings (M-x, M-C-x, etc) to sometimes produce garbled key bindings and garbled entries in clink-show-help (Alt+H).
• Fixed crash if "luafunc:" key binding macro refers to a symbol that doesn't exist.

#### v1.1.25

• Added clink-find-conhost command that, when in a default (conhost) console window, is equivalent to picking "Find..." from the system menu.
• Added clink-mark-conhost command that, when in a default (conhost) console window, is equivalent to picking "Mark" from the system menu.
• clink-copy-word now copies the current word by default, but copies the nth word if a numeric argument is entered (see "Readline Arguments" in the Readline manual).
• Fixed match display filtering to not exceed the screen width (regression introduced in v1.1.12).
• Fixed multi-key sequences; in some cases it could get confused about whether an input key is part of a multi-key binding sequence (regression introduced in v1.1.1-alpha).
• Fixed stray input processing by conhost (holding Ctrl+A or Ctrl+F or etc could accidentally trigger conhost's shortcut keys).
• Fixed popup window location and size when using Windows Terminal.
• Fixed input coloring after operate-and-get-next; also fixes brief flicker of incorrect coloring whenever the input line is modified.

#### v1.1.24

• auto for terminal.emulation now uses native VT support on Windows 10 build 15063 and higher, unless the HKCU\Console\ForceV2 regkey is 0.
• Special quote handling now enables "dir\"fi to complete to "dir\file". CMD simply strips quotes during completion, and now Clink behaves similarly.
• Breaking Change: line:getword() and line:getendword() now strip quotes from the word. This should generally automagically make existing match generators work even with embedded quotes, but there's a chance that some match generator might need to be updated. This seems like a reasonable compromise, given the general benefit purchased by this breaking change.
• os:globdirs() and os:globfile() strip quotes from the globpattern in order to behave more like CMD. Embedded quotes are nonsensical and the intended interpretation is clear, so the APIs now help out with that.
• Fixed #66; crash when injecting into 32 bit cmd (regression introduced in v1.1.21).
• Fixed #64; wrong cursor position when PROMPT contains BEL character.
• Fixed #62; argmatchers should color -x:"foo" as a flag if -x: is a flag.
• Fixed #61; argmatchers should not handle completion for text immediately following -flag:. Instead it always uses file completion. A custom generator can be used to override that behavior.
• Fixed #60; completion fails with multiple slashes.
• Fixed completion in some circumstances. Readline and Clink didn't always agree on where the word breaks were; now Clink always tells Readline where the word breaks are (so that completion, input colorization, and lua scripts can all work properly and consistently).
• Fixed 256 color ANSI codes.

#### v1.1.23

• Fixed #57; slashes not normalized in some cases.
• Fixed #45; interaction between history.dupe_mode=erase_prev and history.shared=false.
• Fixed menu-complete-wraparound when off and there's only 1 match.

#### v1.1.22

• Added menu-complete-wraparound (on by default) that controls whether completion commands wrap around when cycling past an end (affects popup windows as well).
• Fixed match completion getting stuck (regression introduced in v1.1.19).
• Fixed active mark region so it gets deactivated appropriately (it wasn't hooked up fully for Readline's callback mode, which is the mode Clink uses).
• Fixed clink-show-help (Alt+H) so it's able to list C-@ bindings.
• Fixed inconsistent mark color.

#### v1.1.21

• Added clink.oninject() so scripts can register a callback function to run when Clink is injected into CMD.
• Added console.linehascolor() function that returns whether the specified line contains any of the specified colors.
• Added console.findprevline() and console.findnextline() functions that can search backwards or forwards for text and/or colors in the screen buffer. Regular expressions may be used.
• Fixed doskey alias parsing for match generators and input line coloring (Clink had been using slightly different parsing rules than CMD does).
• Fixed the "-- More --" prompt while listing key bindings; Esc didn't quit, and unexpected keys weren't ignored.

#### v1.1.20

• Now you can bind Lua functions to keys via "luafunc:" macros! Added new rl_buffer type that gets passed to the Lua function.
• Added a group of console Lua APIs intended mainly for use by Lua function key bindings (e.g. console.scroll()).
• Added string.equalsi() function that performs a case insensitive UTF8 comparison of two strings.
• Added string.matchlen() function that compares two UTF8 strings and returns how many characters match at the beginning, or -1 if the entire strings match. It respects the match.ignore_case and match.ignore_accents settings.
• Added path.toparent() function that adjust the input string by moving up one directory level.
• Added clink.onendedit() so scripts can register a callback function to run when editing finishes (e.g. Enter is pressed). If desired, the function can even change the input text. This is very powerful, and should be used carefully.
• Changed os.getbatterystatus() to return a table with the battery status details, rather than four separate return values.
• Fixed the doskey.enhanced setting to not expand doskey aliases when preceded by a space. However, a doskey alias after a & or | command separator needs to be preceded by two spaces to avoid expanding it. That's so alias & alias expands both, and  alias & alias expands neither; while the rules are more complicated to explain, they make more sense visually.
• Fixed environment variable completion (regression introduced in v1.1.19).
• Fixed Cmder startup (regression introduced in v1.1.17). Cmder expects to be able to replace Clink v0.4.9's clink.lua file, but there is no such thing anymore in newer versions of Clink. To be properly backwardly compatible with Clink v0.4.9 requires loading clink.lua (if it exists) from the first script directory listed by clink info, and ignoring clink.lua files in all other script directories.

#### v1.1.19

• Improved responsiveness while typing: matches are collected only on demand, instead of always while typing. This makes it possible to always support match completion for UNC paths.
• Fixed #50; Alt+H could warn about likely mistakes in key bindings.

#### v1.1.18

• The input text now has context sensitive coloring based on the argmatchers. It's on by default and can be turned off with clink set clink.colorize_input false.
• Updated the Readline library to 8.1.
• Terminal emulation now supports the audible bell character.
• Fixed #48; menu-complete gets stuck.
• Fixed #47; Alt+D erases history instead of word.
• Fixed #46; typing .. in subdirectory of root doesn't work.
• Fixed restoring color after pager when showing help.
• Fixed clink set match completions for color settings.

#### v1.1.17

• Added os.getbatterystatus() function that gets battery status information much faster than launching wmic.
• Fixed #44; Path completion doesn't work with cd /d.

#### v1.1.16

• Added match.ignore_accent setting (enabled by default) that ignores Latin alphabet diacriticals when completing matches (e.g. ä matches a, ı matches i, ł matches l, etc).
• Fixed #42; history lines are split on special characters.
• Fixed #41; Enable custom doskey handling of .. and -.
• Fixed Readline bug inserting dir matches; \win_ foo (cursor at _) would become \Windows\\_ foo.
• Fixed the quoted-insert command to insert just \x1b when ESC is pressed.

#### v1.1.15

• Migrating settings now immediately writes a new settings file, instead of waiting until a setting is changed.
• Added support to detect when running in Windows Terminal and use native terminal support (which enables things like Xterm 256 and 24-bit color support).
• Added terminal emulation support for Xterm 256 and 24-bit color escape codes. Clink maps the specified color to the most similar color in the active 16 color palette (using the CIELAB color space). To get full support for 24-bit color, it's necessary to use ConEmu or Windows Terminal or a similar console host, or to set terminal.emulation to native (which isn't supported on some older Windows OS versions).
• Allow doskey macros named .. or -, and also now doskey macros that resolve to .. or - or a directory name will work (just like if the macro text had been typed at the Clink prompt).
• Fixed compatibility problem with various scripts getting the %HOME% environment variable. Now if it isn't set, then Clink synthesizes %HOME% from %HOMEDRIVE% and %HOMEPATH% or from %USERPROFILE%.
• Fixed saving color settings to behave like other settings: only write a setting's value to the setting file if it differs from the default value.
• Fixed the clink.print() Lua function so it also works during loading scripts and during prompt filtering.
• Fixed the Readline input text display getting garbled if the filtered prompt includes Xterm's OSC window title code (\x1b]0;text\x07). Clink doesn't support that escape code, but at no longer garbles the input text if that escape code is present.

#### v1.1.14

• Migrate settings and history from an old version of Clink, if present. This only happens if the new-version Clink settings or history files don't exist. (Deleting an existing new-version Clink settings or history file will cause migration to happen again.)
• Added color.prompt setting for backward compatibility with Clink v0.4.x.

#### v1.1.13

• Fixed clink.arg.register_parser backward compatibility.

#### v1.1.12

• Added clink.ondisplaymatches() as a replacement for the deprecated clink.match_display_filter. The new API is able to support popup list windows as well.
• Fixed #33; Tab autocomplete, auto-quoting paths doesn't seem to work as in Clink 0.4.9.

#### v1.1.11

• Changed to load Lua scripts only once per session, unless forced to reload them. This enables backward compatibility for things like z.lua which has certain features that rely on Clink only loading scripts once per session.
• Added clink.onbeginedit() so scripts can register a callback function to run each time the edit prompt is activated.
• Added lua.reload_scripts setting to optionally force reloading Lua scripts each time the edit prompt is activated.
• Added color.message setting for the Readline message area color (e.g. the search prompt message or digit argument prompt message, etc).
• Fixed stray sticky = appended to completions after typing set  and then typing a different command.

#### v1.1.10

• Fixed #32; hooking ReadConsoleW on Windows 7.

#### v1.1.9

• Added backward compatibility for clink.match_display_filter. The clink-completions/git.lua script uses it a lot, and that should all be working now.
• settings.add adds a color setting when the type is string and the name starts with "color.".
• settings.get now has an extra parameter to request the user friendly color name when getting a color setting.
• Added clink.version_encoded variable with the Clink version number as MMmmmpppp (e.g. v1.1.9 is 10010009) to make it easy for scripts to check for feature availability.
• The clink info command now shows Lua script paths as well.
• Fixed backward compatibility for loading scripts from the profile directory (if clink.path isn't set, then load scripts from the DLL directory and the profile directory).
• Fixed some color.input bleed through to other things (introduced in v1.1.5).
• Fixed scroll commands (regression introduced by input line color in v1.1.5).
• Fixed horizontally sorted match display and re-enabled the performance fix from v1.1.4.
• Fixed wildcard evaluation with non-file and non-directory matches (e.g. a branch name origin/master accidentally didn't match or or *ma because of the /).
• Fixed sort order of foo\ vs foo.bar\ when displaying matches or using the menu-complete family of commands.
• Fixed potentially-missing trailing path separator when menu-complete completes a directory match (regression introduced by wildcard matching in v1.1.5).
• Other obscure minor fixes.

#### v1.1.8

• Fixed file match completions when an argmatcher only generates flag matches.
• Fixed automatic inferring whether Readline should use filename completion and/or display rules (regression introduced by backward compatibility in v1.1.3-alpha).
• Fixed backward compatibility for clink.find_files() and clink.find_dirs() (regression introduced by performance improvement in v1.1.7).
• Ignore extra arguments after the first one (the performance improvement in v1.1.7 revealed that some scripts call clink.find_files() with extra invalid arguments; e.g. clink-completions/modules/matchers.lua).
• Don't append a trailing path separator on directory names returned by these functions (the new os.globfiles() and os.globdirs() functions do, but the old clink.find_files() and clink.find_dirs() functions should not).
• Fixed backward compatibility for coloring matches (regression introduced by backward compatibility changes in v1.1.4).

#### v1.1.7

• Performance improvement when displaying matches: When enumerating files and dirs, the os.globfiles and os.globdirs functions have all the info about each file. Now they can return that info in a table. This frees the match display function from needing to do any further file system IO. The performance boost is noticeable.
• Rewrote the color settings: the .fg and .bg sub-settings are gone, and the main setting now uses a more natural syntax (e.g. clink set color.input bright yellow or clink set color.modmark bright cyan on blue).
• Added "cmd" match type for shell (CMD.EXE) command completions.
• Added VT emulation for the reverse video SGR parameters.
• Fixed tab completion for clink set setting, and also handle the new color setting syntax.
• Fixed confusing behavior if multiple scripts try to add settings with the same name (now the first one succeeds and the rest report errors).

#### v1.1.6

• Hooked up tilde completion in the cd, md, and rd command argmatchers.
• Hooked up tilde completion with the exec.enable setting ("~\pro" matches "C:\Users\myusername\program.exe").
• When terminal.emulation is auto, now it also detects ANSI{32|64}.DLL just like Clink 0.4.8 did.

#### v1.1.5

• The menu-complete family of commands now support matching ? and * wildcards when the match.wild setting is enabled.
• Added colour.input and colour.modmark settings for coloring Readline's input line.
• Added clink.upper() Lua function, and both clink.lower() and clink.upper() are properly UTF8 aware now.
• Added clink-copy-word command that copies the word at the cursor to the clipboard.
• Added clink.promptfilter setting to control whether to filter the prompt with Lua scripts.
• Renamed terminal.emulate setting to terminal.emulation.
• Improved executable file extension logic to consistently use %PATHEXT% (and efficiently).
• Improved file extension logic (e.g. "file.foo bar" has no extension because of the space).
• Updated arg matcher for clink itself (was missing some flags).
• Changed colour.hidden setting to not be set by default.
• Fixed #28; Tab completion for "~" does not work.
• Fixed #25; Unicode surrogate pairs (and emoji) input isn't working -- Microsoft Terminal renders the text correctly, but ConEmu and the default conhost still don't (and that isn't a Clink issue).
• Fixed screen size bug in Readline on Windows.
• Fixed the backwards values in the terminal.emulation setting.
• Fixed .... so it works properly again.
• Fixed case sensitive sorting of matches.
• Fixed script error when %PATHEXT% is empty.
• Fixed the exec.cwd Clink setting to default to true, so that the default behavior is consistent with how v0.4.x behaved.
• Fixed the cd, md, rd, etc argmatchers to only match one argument to be consistent with the actual command syntax.

#### v1.1.4

• Automatically detect when running inside ConEmu and disable Clink's Virtual Terminal emulation.
• Added search-ignore-case inputrc variable that makes the history search commands case insensitive.
• Suppress adding a space after completing a flag match that ends with : or = (e.g. msbuild -maxCpuCount:).
• Report an error if a Lua script tries to add a flag string that begins with a letter.
• Fixed slow printing of possible matches. Readline is inefficient about emitting output, so Clink supplies a custom implementation.
• Fixed some bugs in auto detection of flag prefix characters.
• Fixed backward compatibility for flags, and for args when merging two parsers by calling clink.arg.register_parser('foo') multiple times for the same command string.
• Fixed truncated message when the last line of a prompt exceeds 128 characters.
• Fixed abort (Ctrl+G or Esc) in non-incremental history search mode.
• Fixed saved values for settings added by Lua scripts; now the saved value is available to the script immediately on adding the setting, and saved values are retained even if the setting isn't always added by the script.
• Fixed (and documented) shorthand form for defining an argmatcher.
• Fixed length of colored match prefix after a path separator.
• Fixed normalizing a slash by itself (command / mustn't become command \ since that can interfere with completing flags).
• Fixed the completion-auto-query-items inputrc variable.
• Fixed the key binding list to correctly respect completion-display-width.
• No visible effect yet: internal change that parses the input line to identify colors to use for each word (command, argument, flag, etc), but the colors aren't yet applied to the input line.

#### v1.1.3-alpha

• Fixed argmatcher lookup to be more strict, like in Clink 0.4.9 (match exact names, or name plus an extension from %PATHEXT%).
• Backward compatibility:
• Most things should work now.
• Dropping the new Clink on top of the vendor\clink directory in Cmder seems to work -- but make a backup before you try this at home!
• API changes:
• Added log.info() function.
• Added Clink version numbers in clink.version_major, etc.
• Added _argmatcher:getwordbreakinfo() callback; removed _argmatcher:setprefixincluded() (it was a mess, and it was new to v1.x, so there's no compatibility concern with removing it).
• Deprecated _argmatcher:setflagprefix(); now it happens automagically when using _argmatcher:addflags().
• Introduced several deprecated functions to support backward compatibility.
• Improvements to Lua debugger:
• Added lua.traceback_on_error, lua.break_on_error, and lua.break_on_traceback settings to make debugging script errors easier.
• Made pause() consistent about pausing in the caller (rather than sometimes inside the pause command itself).
• The debugger automatically shows the stack trace when entering debug mode, and on every pause.
• Show 3 lines of source context by default.
• The help list is sorted now.
• Fixed the set command in the debugger to behave as documented.

#### v1.1.2-alpha

• Documentation is mostly updated; just the argmatcher Lua API and Clink command line options are left to be documented.
• Added history.max_lines setting that controls how many lines of command history to save (1 to 50000, default is 2500).
• Added readline.hide_stderr setting that can suppress stderr output from the Readline library.
• For backward compatibility with 0.4.8, clink_inputrc files are loaded as well.
• Lua script API changes:
• addmatch() in Lua scripts takes an optional match type argument.
• Removed displayable, aux, and suffix fields in matches.
• Revert the change to disallow mixing file/directory/symlink with other match types (it broke the tests and certain completion scenarios).
• Fixed issues:
• #18 alt+digit then alt+ctrl+y isn't working.
• #17 arrow keys don't exit reverse-search-history like in bash.
• #16 problems with $T in doskey macros. • #13 clink history delete <n> returns a CRT error. • Other fixes: • There should be no more problems running on Windows Insider builds because Clink now uses Detours for hooking APIs. • Fixed crash in insert-completions due to heap failure (introduced by the performance changes for displaying matches). • Fixed clink and history built-in aliases (solve glitchy path problem). • Fixed scrolling to top of screen buffer. • Fixed env var and set completions. • Fixed tilde-expand for quoted text. • Fixed Esc in Readline's digit argument input mode (it doesn't try to cancel the mode, because that's not how Readline is documented to work). • Fixed exit code from some clink command line options. • Set locale to UTF8 much earlier to avoid quirky behavior early in script processing. #### v1.1.1-alpha • Exclusively use Readline's completion implementation. This (with fixes and enhancements in Readline itself) makes the completion experience much nicer and more sophisticated, and removes a lot of code that was added in v1.0.0a0. • Exclusively use Readline's key binding implementation. This makes it possible to have a single consistent way to set key bindings (inputrc) and for clink-show-help to list all key bindings, and removes a lot of code that was added in v1.0.0a0. • Converted all of Clink's internal key behaviors to be implemented as commands that can be bound in the inputrc file. • Rewrote and refactored the pagination routine to be used in multiple places. • Fixed prompt filtering to correctly use the specified priority order. • Readline library: • Updated the Readline library from v6.2 to v8.0. This picked up lots of bug fixes and new capabilities (for example colored completions). • Changed Readline to support backslash as a path separator. • The pager prompt in Readline is optionally colored, controlled by the colour.interact Clink setting. • Added completion-auto-query-items config variable (on by default) which asks whether to list possible matches when the number of lines listed will fill one screen page. • Added history-point-at-end-of-anchored-search config variable in inputrc to make the cursor point behave like 4Dos/4NT/TakeCommand when searching forward and backward through command history. • Fixed prev history at top of history. • Fixed to get the current values of environment variables when needed, rather than always getting the value from whenever Clink was started. • Fixed coloring directory completions. • Fixed menu-complete for \dir and . and ... • Fixed slow performance when displaying matches. Readline was calling stat() at least once per match (!!). A new match type field enables faster performance, coloring readonly and hidden file matches, applying filename completion rules only to filenames (vs branch names or other text strings), correct match de-duplication, and more. The Lua match APIs can supply the new match type. • Fixed inserting a completion to happen as a single undo group. • Fixed tilde to map to %USERPROFILE% instead of %APPDATA% on Windows. • Typing a directory by itself uses cd /d to change to the directory: • Typing a directory with a trailing path separator changes to the directory. • Typing ..\ changes to the parent directory. • Typing ... or .... etc moves up an extra parent directory level for each extra dot (2 dots move up one parent, 3 dots moves up two parents, etc). A trailing path separator is optional when there are more than 2 dots. • Typing - or cd - or chdir - changes to the previous directory. • Commands that are new, enhanced, or fixed: • Added add-history and remove-history commands (similar to 4Dos/4NT/TakeCommand). • Got the menu-complete, menu-complete-backward, and old-menu-complete commands working (they never worked properly before in Clink). • Also added a corresponding old-menu-complete-backward command for reverse order. • All of the *-menu-complete-* commands support wildcards (* and ?). • Added clink-show-help command (Alt+H). The help now lists all key bindings, and it shows user-friendly key names (like A-Up or C-x,C-r or C-S-PgUp or A-C-S-F3). • Added clink-popup-completions command that shows a popup window listing possible completions. Enter inserts the highlighted completion. • Added clink-popup-directories command that shows a popup window listing recent directories. Enter changes to the highlighted directory, or Shift+Enter inserts the highlighted directory in the editing line (or Ctrl+Enter). • Added clink-popup-history command that shows a popup window listing command history. Enter executes the highlighted command, or Shift+Enter jumps to the highlighted command in the history (or Ctrl+Enter). • Added clink-scroll-lineup, clink-scroll-linedown, clink-scroll-page-up, clink-scroll-page-down, clink-scroll-top, and clink-scroll-bottom commands that do what it looks like they'd do and are bound to the keys it looks like they'd be. • Added clink-expand-doskey command (Ctrl+Alt+f) that expands the current line according to the current doskey aliases. • Added clink-expand-env-var command (Ctrl+Alt+e) that expands the environment variable at the cursor point. • Added clink-exit command (Alt+F4) that exits CMD. • Fixed keyboard input issues: • Esc is a bindable key now (\e[27;27~). • Added more bindable key combinations (run clink echo then press keys to see the key sequence to use in the inputrc file). • Ctrl+@ (NUL) didn't work. • Ins toggles insert/overwrite mode. • Unbound keys are ignored now, instead of inserting gibberish characters (part of the terminal internal key sequence). • Fixed input handling so the quoted-insert command can work properly. • Fixed Esc while searching. • Fixed vi mode (was working in v0.4.9, but not in v1.0.x). • Fixed command history issues: • The dont_add_to_history_cmds Clink setting is a space-delimited list of commands to not add to history. • Fixed bleeding between history banks. • Fixed uninitialized variable that made history updates intermittently do nothing or corrupt the other history bank. • Fixed output from clink history to convert to UTF16 when writing to the console (but write UTF8 when output is redirected). • Fixed terminal output issues: • Added terminal.emulate Clink setting that controls whether Clink does VT emulation or passes all ANSI escape codes directly to the console host. For example, this lets the prompt and completion coloring take advantage of more sophisticated ANSI escape codes such as XTerm 256 color and 16 bit color support. • Added back support for the prefer-visible-bell config variable. • Fixed underline support. • Fixed handling for UTF8 output from Readline. • Fixed invisible cursor point in Lua debugger. • Completions: • Added match.sort_dirs Clink setting that specifies where to sort directories in the list of possible completions: before files, mixed in with files, or after files. • Don't attempt completing incomplete UNC paths: at least the \\server\share\ path components are required (for anything shorter the OS APIs are guaranteed to fail, but will fail slowly). • Fixed sorting to use Unicode aware locale based sorting (like Windows does) instead of dumb UTF8 byte comparisons. • Fixed arbitrary limit on completions (had been limited to 64KB worth of completions). • Fixed quoting spaces in completions. • Fixed to use the same list as CMD for characters that require quoting. • Fixed normalizing UNC paths. • Fixed volume relative completions (e.g. x:foo). • Disallow mixing file/directory/symlink with other match types. This was to avoid a confusing/malfunctioning case in match display and prefix highlighting. • Fixed UTF8 encoding in various Lua functions. • Fixed printing stderr output from Readline, Lua, and Clink. • Fixed crashes and other failures when starting Clink in 32 bit CMD. • Fixed some memory leaks that accumulated with each new line of input. • Fixed prompt filtering API to be backward compatible with v0.4.9 scripts. • Fixed Lua errors from clink set (it neglected to fully initialize Clink's Lua integration before loading Lua scripts). • Fixed UTF8 conversion bug that could truncate a string without fully converting it. • Fixed serious rampant memory corruption bug in v1.0.x (not present in v0.4.9), which had been causing intermittent malfunctions and data corruption and crashes. • Fixed multi-line doskey macros to show the prompt in between lines, like CMD does. • Removed the 4096 byte limit on input. • Renamed the Clink DLL back to what it was in v0.4.x, to fix compile time problems. • Other fixed issues: • Fixed many other bugs. #### v1.0.0a1 (alpha test release) • Improve terminal integration with the Readline library. • Internal improvements to the built-in ecma48 terminal emulator. • Fixed use after free in Doskey emulation. • Fixed dash-dash flag completion. • Search ancestors for a compatible target process (for when cmd.exe starts another process that subsequently starts clink; especially useful during development). • Use clink/terminal's wcwidth() implementation. • screen_buffer::set_cursor() should be relative to the visible area. • Try to adjust the cursor position better when resizing the terminal. • Some internal Lua functions needed the unquoted clink exe path. • The origin path now affects the hash in the dll cache, to guard against directory moves. • More code reorganization. #### v1.0.0a0 (alpha test release) • Extensive code reorganization, refactoring, and rewriting -- multiple times -- almost everything was touched. • OS integration: • Fixed Doskey macros on Win8, and on Win10. • Fixed clink_x??.exe startup stall on Windows 10. • Removed XP support. It doesn't load DLLs like Clink uses them. • Removed Powershell support. • Readline integration: • Search for multiple places for [.|_]inputrc (fixes mridgers #258). • Disabled Readline's completion code, and only use the clink alternative code. • Removed redundant slash translation and shims to make it happen. • Removed control of Readline's suffix appending and disabled it. • clink commands and flags: • Changed --cfgdir to --profile, it's no longer required, and added help about it. • Added a --version option to print Clink's version. • Added clink info to print information about Clink. • Added clink echo command to echo input key sequences to stdout. • Added clink history command (fixes mridgers #172). • Added history as an alias for clink history. • Added internal --list flag to clink set for match generation. • Removed --scripts argument (fixes mridgers #206). • Updated clink autorun command's help text. • Lua scripts: • Prefer userprofile over other standard environment variables for where to look for lua scripts. • New API for argument style completion scripts. • Refactored prompt filtering, and introduced new prompt filtering API. • Refactored generating matches, and introduced new match generator API. • Removed built in completions scripts for git, go, hg, and p4. There's better ones. • Renamed many of clink's Lua functions. • Moved functions from clink to os in Lua. • Removed clink.is_match() in Lua; don't presume anything on anyone's behalf about matches. • Added some current dir functions in Lua. • Added some env/dir functions in Lua. • Exposed path manipulation functions to Lua. • Embed the core Lua scripts instead of loading them from files. • Terminal IO: • Added a module for scrolling the screen. • Rewrote the terminal emulation module, and all Readline IO goes through it. • Use VT220-style control codes for special keys. • If Alt is pressed send ESC in the input stream rather than setting meta bit. • Replaced wcwidth() with a more complete and correct version. • Settings: • Added clink_path setting for where to look for lua scripts. • Added match.ignore_case setting. • Added files.unc_paths setting for optional matching from UNC paths. • Added a setting to skip adding lines that start with history. • Removed esc_clears_line setting. • Pasting CRLFs doesn't really make sense. • Don't write out settings that are set to default. • Make sure Ctrl-C doesn't modify history. • Make a cached copy of Clink's DLL when injecting so as to not lock the master. • Guard against Readline's writes to stderr. • Remove clink_inputrc_base file and embed its content (fixes mridgers #257). • Include more metadata in the Clink's executables. #### v0.4.9 • Fixed broken Doskey on Win10 (#438, #451) #### v0.4.8 • Environment variable clink_profile overrides Clink's profile path (#390). • Load a clink_inputrc file from Clink's profile directory (fixes #406). • Bug fixes; • Redraw issues when prompts end in OSC ANSI codes (#387, #384). • Fixed clink autorun --help crash. #### v0.4.7 • Bug fixes; • Sometimes autorun tries to run clink.exe (#374). • Autorun would cause cmd.exe to return an error if it wasn't interactive (#373). #### v0.4.6 • HOME is only set if it is currently unset. • Readline can be initialised with .inputrc and _inputrc files too (#258). • Bug fixes; • Executable completion; • Paths from PATH were checked twice. • Incorrect results were returned for words ending in . or -. • Directories . and .. were incorrectly displayed. • Fixed a crash if .bat script's stdout is redirected (#366). • Occasional crash when injecting Clink (#351). • Display errors; • When editing near the window's right-hand edge (#347). • Double display of multi-line prompts when resizing the terminal (#352). • Very rare wrap artefacts when making the terminal window larger. • Doskey emulation (#344). • Improved clink autorun help (#348). • Fixed launching Clink when clink.bat is renamed (#357). #### v0.4.5 • Improved clink autorun. It now defaults to the Current User registry hive. • clink set gives more details for enumeration-type settings. • Tab completion for p4vc. • New settings history_expand_mode to control history expansion in quotes (#317). • Bug fixes; • Use full width of the terminal (#337). • Fixed MinGW compile error (#335). • Autorun now defaults to the current user's hive (#332). • Creating clink.html no longer needs Pandoc, plus it looks a bit better (#331). • Added settings to control history expansion (#326). • Correct fallback when use_altgr_substitute is off (#325). • Load history prior to saving it on shutdown (#318). • Added Shift-Tab documentation and menu completion example (#190). • Added shim for backwards menu completion (#190). • Input handling now outputs \eZ for Shift-Tab (#190). • Updated Readme with current Premake info (#310). • Guard against there being no buffer to read from (#304). • Fixed artefacts when resizing conhost's buffer (#139). • Clear remaining characters if scroll window was too small (#301) • Escape % characters when expanding aliases (#280). • Fixed leaking exception filters. • Clearing the screen doesn't leave artefacts behind. #### v0.4.4 • Completing .. behaves more like Bash (#277). • Escape from yes/no question when Ctrl+C is pressed. • Valid XP executables (#278, #289). • Fixed n-th argument yank not working as expected (#254). • Fixed prompt colours sometimes not working (#279, #286). • Fixed !0 causing Clink to crash. • Save/restore cursor position in case Readline moves it. #### v0.4.3 • Localised Y/N when auto-answering "terminate?" prompt. • $* would early out if there was no arguments.
• Disable ANSI code support if third party provides it.
• Installer can now set %CLINK_DIR% to install location.
• Improved output from clink set.
• Support for Windows 10 Technical Preview.
• Ctrl-L now scrolls last line to the top of the window rather than clearing.
• New option to control how newline characters are pasted to the line.
• New options to control history;
• history_file_lines - maximum lines saved to disk.
• history_ignore_space - ignore lines prefixed with whitespace.
• history_dupe_mode - how duplicate entries are handled.
• history_io - load/save history from disk every line.
• Fixed missing WINCH signals if other processes resize the buffer.
• Support Alt codes sent from Conhost.

#### v0.4.2

• Prompt colouring no longer requires third party ANSI code utility.
• Override settings with environment variables prefixed with 'clink'.
• Ctrl-PgUp goes up a directory.
• Updated Go completions (by matrixik).
• Removed footer and Alt-H tip for more succinct stdout output.
• Bug fixes;
• Windows XP works again.
• Fixed race condition in lua_execute().

#### v0.4.1

• Bug fixes;
• Various Unicode fixes causing corrupt environment variables.
• Fixed incorrect translation of suffixed slash when completing flags.
• Add --nolog argument to disable file logging. Fix #187 Fix #154
• Added missing escape sequences from doskey emulation.
• Reinstated unix-kill-line key binding.
• Mapped PgUp/Down to search history using line typed so far.
• Added documentation covering escape codes for special keys.
• Added support for Windows' AltGr substitute Ctrl-Alt.

#### v0.4

• New features;
• Better clink.arg API. Easier, more intuitive, and more powerful.
• Whitespace prefix skips exec matching.
• Added a set verb to easily change settings from the command line.
• Basic support for a shells other than cmd.exe.
• Completion for Go (contributed by Dobroslaw Zybort).
• Setting exec_match_style to -1 disables it entirely.
• Make history persistence optional.
• Alias/doskey completion.
• Very basic support for Powershell.
• View cmd.exe's autorun entry without needing admin rights.
• New key bindings;
• Ctrl-Alt-C : Copy command line to the clipboard.
• Ctrl-Alt-E : Expand environment variable under cursor.
• Ctrl-Alt-U : "up directory" (formerly Shift-Up).
• Ctrl-U : Adds ..\ to the command line.
• Alt-H : Shows active keymap's key bindings.
• New Lua functions;
• Lots of bug fixes, including;
• Better command extraction.
• Fixed cmd.exe command paging and Ctrl-C/Ctrl-Break handling.
• Multiple locale fixes.
• Use localised text for "Terminate batch job?" prompt.

#### v0.3

• Automatic answering of cmd.exe's "Terminate batch script?" prompt.
• Coloured prompts (requires ANSICON or ConEmu).
• Added Shift-Up keyboard shortcut to automatically execute cd ..
• Mapped Ctrl-Z to undo, Microsoft style.
• New input handling code (Ctrl-Alt combos now work).
• An implementation of the Termcap library.
• Fully functional Vi-mode support.
• Support for resizable consoles.
• Line wrapping now works correctly (issue 50).
• Adjustable executable match style (issue 65).
• Improved environment variable completion.
• New Lua features and functions;
• Matches can now be filtered in Lua before they are display.
• Functions to query Clink's settings.
• New command line options;
• --profile dir to override default profile directory.
• --nohostcheck disables verification that host is cmd.exe.
• --pid specifies the process to inject into.
• Update Mercurial completion (issue 73).
• Start menu shortcut starts in USERPROFILE, like cmd.exe
• Zip distribution is now portable.

#### v0.2.1

• The .history file now merges multiple sessions together.
• Fixed missing y/n, pause, and other prompts.
• Fixed segfault in loader executable.
• Better ConEmu compatibility.

#### v0.2

• Basic argument completion for git, hg, svn, and p4.
• Traditional Bash clear screen (Ctrl-L) and exit shortcuts (Ctrl-D).
• Scrollable command window using PgUp/PgDown keys.
• Doskey support.
• Automatic quoting of file names with spaces.
• Scriptable custom prompts.
• New argument framework to ease writing context-sensitive match generators.
• History and log file is now saved per-user rather than globally.
• Improved Clink's command line interface (clink --help).
• More reliable handling of cmd.exe's autorun entry.
• General improvements to executable and directory-command completion.
• Documentation.
• Windows 8 support.
• Improved hooking so Clink can be shared with other thirdparty utilities that also hook cmd.exe (ConEmu, ANSICon, etc.).

#### v0.1.1

• Fixed AltGr+<key> on international keyboards.
• Fixed broken completion when directories have a -` in their name (Mark Hammond)
• The check for single match scenarios now correctly handles case-insensitivity.

#### v0.1

• Initial release.

# Credits

Copyright (c) 2012-2018 by Martin Ridgers.

Portions Copyright (c) 2020-2021 by Christopher Antos.