BIND(1)

NAME
bind - handle fish key bindings

SYNOPSIS
bind [(-M | --mode) MODE] [(-m | --sets-mode) NEW_MODE] [--preset | --user] [-s | --silent] KEYS COMMAND ...
bind [(-M | --mode) MODE] [--preset] [--user] [KEYS]
bind [-a | --all] [--preset] [--user]
bind (-f | --function-names)
bind (-K | --key-names)
bind (-L | --list-modes)
bind (-e | --erase) [(-M | --mode) MODE] [--preset] [--user] [-a | --all] | KEYS ...

DESCRIPTION

bind manages key bindings.

If both KEYS and COMMAND are given, bind adds (or replaces) a binding in MODE. If only KEYS is given, any existing binding for those keys in the given MODE will be printed. If no KEYS argument is provided, all bindings (in the given MODE) are printed.

KEYS is a comma-separated list of key names. Modifier keys can be specified by prefixing a key name with a combination of ctrl-, alt-, shift- and super- (i.e. the "windows" or "command" key). For example, pressing w while holding the Alt modifier is written as alt-w. Key names are case-sensitive; for example alt-W is the same as alt-shift-w. ctrl-x,ctrl-e would mean pressing ctrl-x followed by ctrl-e.

Some keys have names, usually because they don't have an obvious printable character representation. They are:

    •   the arrow keys up, down, left and right,

    •   backspace,

    •   comma (,),

    •   delete,

    •   end,

    •   enter,

    •   escape,

    •   f1 through f12.

    •   home,

    •   insert,

    •   menu,

    •   minus (-),

    •   pageup,

    •   pagedown,

    •   printscreen,

    •   space and

    •   tab,

These names are case-sensitive.

An empty value ('') for KEYS designates the generic binding that will be used if nothing else matches. For most bind modes, it makes sense to bind this to the self-insert function (i.e. bind '' self-insert). This will insert any keystrokes that have no bindings otherwise. Non-printable characters are ignored by the editor, so this will not result in control sequences being inserted.

To find the name of a key combination you can use fish_key_reader <>.

COMMAND can be any fish command, but it can also be one of a set of special input functions. These include functions for moving the cursor, operating on the kill-ring, performing tab completion, etc. Use bind --function-names or see below for a list of these input functions.

Note:
        If a script changes the commandline, it should finish by calling the repaint special input function.

Key bindings may use "modes", which mimics vi's modal input behavior. The default mode is "default" (in vi-mode, that's vi's "normal" mode). Every key binding applies to a single mode; you can specify which one with -M MODE. If the key binding should change the mode, you can specify the new mode with -m NEW_MODE. The mode can be viewed and changed via the $fish_bind_mode variable. If you want to change the mode from inside a fish function, use set fish_bind_mode MODE.

To save custom key bindings, put the bind statements into config.fish <#configuration>. Alternatively, fish also automatically executes a function called fish_user_key_bindings if it exists.

OPTIONS

The following options are available:

    -f or --function-names
        Display a list of available input functions

    -K or --key-names
        Display a list of available named keys such as backspace.

    -L or --list-modes
        Display a list of defined bind modes

    -M MODE or --mode MODE
        Specify a bind mode that the bind is used in. Defaults to "default". If you use vi bindings <#vi-mode>, that's the command mode, what vi calls "normal" mode.

    -m NEW_MODE or --sets-mode NEW_MODE
        Change the current mode to NEW_MODE after this binding is executed

    -e or --erase
        Erase the binding with the given sequence and mode instead of defining a new one. Multiple sequences can be specified with this flag. Specifying -a or --all with -M or --mode erases all binds in the given mode regardless of sequence. Specifying -a or --all without -M or --mode erases all binds in all modes regardless of sequence.

    -a or --all
        See --erase

    --preset and --user
        Specify if bind should operate on user or preset bindings. User bindings take precedence over preset bindings when fish looks up mappings. By default, all bind invocations work on the "user" level except for listing, which will show both levels. All invocations except for inserting new bindings can operate on both levels at the same time (if both --preset and --user are given). --preset should only be used in full binding sets (like when working on fish_vi_key_bindings).

    -s or --silent
        Silences some of the error messages, including for unknown key names and unbound sequences.

    -h or --help
        Displays help about using this command.

SPECIAL INPUT FUNCTIONS

The following special input functions are available:

    and only execute the next function if the previous succeeded (note: only some functions report success)

    accept-autosuggestion
        accept the current autosuggestion. Returns false when there was nothing to accept.

    backward-char
        move one character to the left. If the completion pager is active, select the previous completion instead.

    backward-char-passive
        move one character to the left, but do not trigger any non-movement-related operations. If the cursor is at the start of the commandline, does nothing. Does not change the selected item in the completion pager UI when shown.

    backward-bigword
        move one whitespace-delimited word to the left

    backward-token
        move one argument to the left

    backward-delete-char
        deletes one character of input to the left of the cursor

    backward-kill-bigword
        move the whitespace-delimited word to the left of the cursor to the killring

    backward-kill-token
        move the argument to the left of the cursor to the killring

    backward-kill-line
        move everything from the beginning of the line to the cursor to the killring

    backward-kill-path-component
        move one path component to the left of the cursor to the killring. A path component is everything likely to belong to a path component, i.e. not any of the following: /={,}'":@ |;<>&, plus newlines and tabs.

    backward-kill-word
        move the word to the left of the cursor to the killring. The "word" here is everything up to punctuation or whitespace.

    backward-word
        move one word to the left

    beginning-of-buffer
        moves to the beginning of the buffer, i.e. the start of the first line

    beginning-of-history
        move to the beginning of the history

    beginning-of-line
        move to the beginning of the line

    begin-selection
        start selecting text

    cancel
        close the pager if it is open, or undo the most recent completion if one was just inserted

    cancel-commandline
        cancel the current commandline and replace it with a new empty one, leaving the old one in place with a marker to show that it was cancelled

    capitalize-word
        make the current word begin with a capital letter

    clear-commandline
        empty the entire commandline

    clear-screen
        clears the screen and redraws the prompt.

    scrollback-push
        pushes earlier output to the terminal scrollback, positioning the prompt at the top. This requires the terminal to implement the ECMA-48 SCROLL UP <#term-compat-indn> command and cursor position reporting <#term-compat-cursor-position-report>.

    complete
        guess the remainder of the current token

    complete-and-search
        invoke the searchable pager on completion options (for convenience, this also moves backwards in the completion pager)

    delete-char
        delete one character to the right of the cursor

    delete-or-exit
        delete one character to the right of the cursor, or exit the shell if the commandline is empty

    down-line
        move down one line

    downcase-word
        make the current word lowercase

    end-of-buffer
        moves to the end of the buffer, i.e. the end of the first line

    end-of-history
        move to the end of the history

    end-of-line
        move to the end of the line

    end-selection
        end selecting text

    expand-abbr
        expands any abbreviation currently under the cursor

    execute
        run the current commandline

    exit
        exit the shell

    forward-bigword
        move one whitespace-delimited word to the right

    forward-token
        move one argument to the right

    forward-char
        move one character to the right; or if at the end of the commandline, accept the current autosuggestion. If the completion pager is active, select the next completion instead.

    forward-char-passive
        move one character to the right, but do not trigger any non-movement-related operations. If the cursor is at the end of the commandline, does not accept the current autosuggestion (if any). Does not change the selected item in the completion pager, if shown.

    forward-single-char
        move one character to the right; or if at the end of the commandline, accept a single char from the current autosuggestion.

    forward-word
        move one word to the right; or if at the end of the commandline, accept one word from the current autosuggestion.

    history-pager
        invoke the searchable pager on history (incremental search); or if the history pager is already active, search further backwards in time.

    history-delete
        permanently delete the current history item, either from the history pager or from an active up-arrow history search

    history-search-backward
        search the history for the previous match

    history-search-forward
        search the history for the next match

    history-prefix-search-backward
        search the history for the previous prefix match

    history-prefix-search-forward
        search the history for the next prefix match

    history-token-search-backward
        search the history for the previous matching argument

    history-token-search-forward
        search the history for the next matching argument

    history-last-token-search-backward
        search the history for the previous matching last argument

    history-last-token-search-forward
        search the history for the next matching last argument

    forward-jump and backward-jump
        read another character and jump to its next occurrence after/before the cursor

    forward-jump-till and backward-jump-till
        jump to right before the next occurrence

    repeat-jump and repeat-jump-reverse
        redo the last jump in the same/opposite direction

    jump-to-matching-bracket
        jump to matching bracket if the character under the cursor is bracket; otherwise, jump to the next occurrence of any right bracket after the cursor. The following brackets are considered: ([{}])

    jump-till-matching-bracket
        the same as jump-to-matching-bracket but offset cursor to the right for left bracket, and offset cursor to the left for right bracket. The offset is applied for both the position we jump from and position we jump to. In other words, the cursor will continuously jump inside the brackets but won't reach them by 1 character. The input function is useful to emulate ib vi text object. The following brackets are considered: ([{}])

    kill-bigword
        move the next whitespace-delimited word to the killring

    kill-token
        move the next argument to the killring

    kill-line
        move everything from the cursor to the end of the line to the killring

    kill-selection
        move the selected text to the killring

    kill-whole-line
        move the line (including the following newline) to the killring. If the line is the last line, its preceding newline is also removed

    kill-inner-line
        move the line (without the following newline) to the killring

    kill-word
        move the next word to the killring

    nextd-or-forward-word
        if the commandline is empty, then move forward in the directory history, otherwise move one word to the right; or if at the end of the commandline, accept one word from the current autosuggestion.

    or  only execute the next function if the previous did not succeed (note: only some functions report failure)

    pager-toggle-search
        toggles the search field if the completions pager is visible; or if used after history-pager, search forwards in time.

    prevd-or-backward-word
        if the commandline is empty, then move backward in the directory history, otherwise move one word to the left

    repaint
        reexecutes the prompt functions and redraws the prompt (also force-repaint for backwards-compatibility)

    repaint-mode
        reexecutes the fish_mode_prompt <> and redraws the prompt. This is useful for vi mode. If no fish_mode_prompt exists or it prints nothing, it acts like a normal repaint.

    self-insert
        inserts the matching sequence into the command line

    self-insert-notfirst
        inserts the matching sequence into the command line, unless the cursor is at the beginning

    suppress-autosuggestion
        remove the current autosuggestion. Returns true if there was a suggestion to remove.

    swap-selection-start-stop
        go to the other end of the highlighted text without changing the selection

    transpose-chars
        transpose two characters to the left of the cursor

    transpose-words
        transpose two words to the left of the cursor

    togglecase-char
        toggle the capitalisation (case) of the character under the cursor

    togglecase-selection
        toggle the capitalisation (case) of the selection

    insert-line-under
        add a new line under the current line

    insert-line-over
        add a new line over the current line

    up-line
        move up one line

    undo and redo
        revert or redo the most recent edits on the command line

    upcase-word
        make the current word uppercase

    yank
        insert the latest entry of the killring into the buffer

    yank-pop
        rotate to the previous entry of the killring

ADDITIONAL FUNCTIONS

The following functions are included as normal functions, but are particularly useful for input editing:

    up-or-search and down-or-search
        move the cursor or search the history depending on the cursor position and current mode

    edit_command_buffer
        open the visual editor (controlled by the VISUAL or EDITOR environment variables) with the current command-line contents

    fish_clipboard_copy
        copy the current selection to the system clipboard

    fish_clipboard_paste
        paste the current selection from the system clipboard before the cursor

    fish_commandline_append
        append the argument to the command-line. If the command-line already ends with the argument, this removes the suffix instead. Starts with the last command from history if the command-line is empty.

    fish_commandline_prepend
        prepend the argument to the command-line. If the command-line already starts with the argument, this removes the prefix instead. Starts with the last command from history if the command-line is empty.

EXAMPLES

Exit the shell when ctrl-d is pressed:

            bind ctrl-d 'exit'

Perform a history search when pageup is pressed:

            bind pageup history-search-backward

Turn on vi key bindings <#vi-mode> and rebind ctrl-c to clear the input line:

            set -g fish_key_bindings fish_vi_key_bindings
            bind -M insert ctrl-c kill-whole-line repaint

Launch git diff and repaint the commandline afterwards when ctrl-g is pressed:

            bind ctrl-g 'git diff' repaint

Swap tab and shift-tab, making tab focus the search field. But if the search field is already active, keep the behavior (tab cycles forward, shift-tab backward).:

            bind tab '
                if commandline --search-field >/dev/null
                    commandline -f complete
                else
                    commandline -f complete-and-search
                end
            '
            bind shift-tab '
                if commandline --search-field >/dev/null
                    commandline -f complete-and-search
                else
                    commandline -f complete
                end
            '

TERMINAL LIMITATIONS

Unix terminals, like the ones fish operates in, are at heart 70s technology. They have some limitations that applications running inside them can't workaround.

For instance, historically the control key modifies a character by setting the top three bits to 0. This means:

    •   Many characters + control are indistinguishable from other keys: ctrl-i is tab, ctrl-j is newline (\n).

    •   Control and shift don't work simultaneously - ctrl-X is the same as ctrl-x.

Other keys don't have a direct encoding, and are sent as escape sequences. For example right (→) usually sends \e\[C.

Some modern terminals support newer encodings for keys, that allow distinguishing more characters and modifiers, and fish enables as many of these as it can, automatically.

When in doubt, run fish_key_reader - explore what characters keyboard keys send <>. If that tells you that pressing ctrl-i sends tab, your terminal does not support these better encodings, and so fish is limited to what it sends.

KEY TIMEOUT

When you've bound a sequence of multiple characters, there is always the possibility that fish has only seen a part of it, and then it needs to disambiguate between the full sequence and part of it.

For example:

            bind j,k 'commandline -i foo'
            # or `bind jk`

will bind the sequence jk to insert "foo" into the commandline. When you've only pressed "j", fish doesn't know if it should insert the "j" (because of the default self-insert), or wait for the "k".

You can enable a timeout for this, by setting the fish_sequence_key_delay_ms <#envvar-fish_sequence_key_delay_ms> variable to the timeout in milliseconds. If the timeout elapses, fish will no longer wait for the sequence to be completed, and do what it can with the characters it already has.

The escape key is a special case, because it can be used standalone as a real key or as part of a longer escape sequence, like function or arrow keys. Holding alt and something else also typically sends escape, for example holding alt+a will send an escape character and then an "a". So the escape character has its own timeout configured with fish_escape_delay_ms <#envvar-fish_escape_delay_ms>.

See also Key sequences <#interactive-key-sequences>.

Copyright
fish-shell developers