863 lines
26 KiB
Bash
863 lines
26 KiB
Bash
# Fish-like fast/unobtrusive autosuggestions for zsh.
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# https://github.com/zsh-users/zsh-autosuggestions
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# v0.7.0
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# Copyright (c) 2013 Thiago de Arruda
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# Copyright (c) 2016-2021 Eric Freese
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#
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# Permission is hereby granted, free of charge, to any person
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# obtaining a copy of this software and associated documentation
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# files (the "Software"), to deal in the Software without
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# restriction, including without limitation the rights to use,
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# copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the
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# Software is furnished to do so, subject to the following
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# conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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# OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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# OTHER DEALINGS IN THE SOFTWARE.
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#--------------------------------------------------------------------#
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# Global Configuration Variables #
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#--------------------------------------------------------------------#
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# Color to use when highlighting suggestion
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# Uses format of `region_highlight`
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# More info: http://zsh.sourceforge.net/Doc/Release/Zsh-Line-Editor.html#Zle-Widgets
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(( ! ${+ZSH_AUTOSUGGEST_HIGHLIGHT_STYLE} )) &&
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typeset -g ZSH_AUTOSUGGEST_HIGHLIGHT_STYLE='fg=8'
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# Prefix to use when saving original versions of bound widgets
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(( ! ${+ZSH_AUTOSUGGEST_ORIGINAL_WIDGET_PREFIX} )) &&
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typeset -g ZSH_AUTOSUGGEST_ORIGINAL_WIDGET_PREFIX=autosuggest-orig-
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# Strategies to use to fetch a suggestion
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# Will try each strategy in order until a suggestion is returned
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(( ! ${+ZSH_AUTOSUGGEST_STRATEGY} )) && {
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typeset -ga ZSH_AUTOSUGGEST_STRATEGY
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ZSH_AUTOSUGGEST_STRATEGY=(history)
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}
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# Widgets that clear the suggestion
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(( ! ${+ZSH_AUTOSUGGEST_CLEAR_WIDGETS} )) && {
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typeset -ga ZSH_AUTOSUGGEST_CLEAR_WIDGETS
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ZSH_AUTOSUGGEST_CLEAR_WIDGETS=(
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history-search-forward
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history-search-backward
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history-beginning-search-forward
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history-beginning-search-backward
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history-substring-search-up
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history-substring-search-down
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up-line-or-beginning-search
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down-line-or-beginning-search
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up-line-or-history
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down-line-or-history
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accept-line
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copy-earlier-word
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)
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}
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# Widgets that accept the entire suggestion
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(( ! ${+ZSH_AUTOSUGGEST_ACCEPT_WIDGETS} )) && {
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typeset -ga ZSH_AUTOSUGGEST_ACCEPT_WIDGETS
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ZSH_AUTOSUGGEST_ACCEPT_WIDGETS=(
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forward-char
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end-of-line
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vi-forward-char
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vi-end-of-line
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vi-add-eol
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)
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}
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# Widgets that accept the entire suggestion and execute it
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(( ! ${+ZSH_AUTOSUGGEST_EXECUTE_WIDGETS} )) && {
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typeset -ga ZSH_AUTOSUGGEST_EXECUTE_WIDGETS
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ZSH_AUTOSUGGEST_EXECUTE_WIDGETS=(
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)
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}
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# Widgets that accept the suggestion as far as the cursor moves
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(( ! ${+ZSH_AUTOSUGGEST_PARTIAL_ACCEPT_WIDGETS} )) && {
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typeset -ga ZSH_AUTOSUGGEST_PARTIAL_ACCEPT_WIDGETS
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ZSH_AUTOSUGGEST_PARTIAL_ACCEPT_WIDGETS=(
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forward-word
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emacs-forward-word
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vi-forward-word
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vi-forward-word-end
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vi-forward-blank-word
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vi-forward-blank-word-end
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vi-find-next-char
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vi-find-next-char-skip
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)
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}
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# Widgets that should be ignored (globbing supported but must be escaped)
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(( ! ${+ZSH_AUTOSUGGEST_IGNORE_WIDGETS} )) && {
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typeset -ga ZSH_AUTOSUGGEST_IGNORE_WIDGETS
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ZSH_AUTOSUGGEST_IGNORE_WIDGETS=(
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orig-\*
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beep
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run-help
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set-local-history
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which-command
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yank
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yank-pop
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zle-\*
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)
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}
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# Pty name for capturing completions for completion suggestion strategy
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(( ! ${+ZSH_AUTOSUGGEST_COMPLETIONS_PTY_NAME} )) &&
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typeset -g ZSH_AUTOSUGGEST_COMPLETIONS_PTY_NAME=zsh_autosuggest_completion_pty
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#--------------------------------------------------------------------#
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# Utility Functions #
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#--------------------------------------------------------------------#
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_zsh_autosuggest_escape_command() {
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setopt localoptions EXTENDED_GLOB
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# Escape special chars in the string (requires EXTENDED_GLOB)
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echo -E "${1//(#m)[\"\'\\()\[\]|*?~]/\\$MATCH}"
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}
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#--------------------------------------------------------------------#
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# Widget Helpers #
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#--------------------------------------------------------------------#
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_zsh_autosuggest_incr_bind_count() {
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typeset -gi bind_count=$((_ZSH_AUTOSUGGEST_BIND_COUNTS[$1]+1))
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_ZSH_AUTOSUGGEST_BIND_COUNTS[$1]=$bind_count
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}
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# Bind a single widget to an autosuggest widget, saving a reference to the original widget
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_zsh_autosuggest_bind_widget() {
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typeset -gA _ZSH_AUTOSUGGEST_BIND_COUNTS
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local widget=$1
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local autosuggest_action=$2
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local prefix=$ZSH_AUTOSUGGEST_ORIGINAL_WIDGET_PREFIX
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local -i bind_count
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# Save a reference to the original widget
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case $widgets[$widget] in
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# Already bound
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user:_zsh_autosuggest_(bound|orig)_*)
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bind_count=$((_ZSH_AUTOSUGGEST_BIND_COUNTS[$widget]))
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;;
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# User-defined widget
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user:*)
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_zsh_autosuggest_incr_bind_count $widget
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zle -N $prefix$bind_count-$widget ${widgets[$widget]#*:}
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;;
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# Built-in widget
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builtin)
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_zsh_autosuggest_incr_bind_count $widget
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eval "_zsh_autosuggest_orig_${(q)widget}() { zle .${(q)widget} }"
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zle -N $prefix$bind_count-$widget _zsh_autosuggest_orig_$widget
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;;
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# Completion widget
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completion:*)
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_zsh_autosuggest_incr_bind_count $widget
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eval "zle -C $prefix$bind_count-${(q)widget} ${${(s.:.)widgets[$widget]}[2,3]}"
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;;
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esac
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# Pass the original widget's name explicitly into the autosuggest
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# function. Use this passed in widget name to call the original
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# widget instead of relying on the $WIDGET variable being set
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# correctly. $WIDGET cannot be trusted because other plugins call
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# zle without the `-w` flag (e.g. `zle self-insert` instead of
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# `zle self-insert -w`).
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eval "_zsh_autosuggest_bound_${bind_count}_${(q)widget}() {
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_zsh_autosuggest_widget_$autosuggest_action $prefix$bind_count-${(q)widget} \$@
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}"
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# Create the bound widget
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zle -N -- $widget _zsh_autosuggest_bound_${bind_count}_$widget
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}
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# Map all configured widgets to the right autosuggest widgets
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_zsh_autosuggest_bind_widgets() {
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emulate -L zsh
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local widget
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local ignore_widgets
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ignore_widgets=(
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.\*
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_\*
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${_ZSH_AUTOSUGGEST_BUILTIN_ACTIONS/#/autosuggest-}
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$ZSH_AUTOSUGGEST_ORIGINAL_WIDGET_PREFIX\*
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$ZSH_AUTOSUGGEST_IGNORE_WIDGETS
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)
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# Find every widget we might want to bind and bind it appropriately
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for widget in ${${(f)"$(builtin zle -la)"}:#${(j:|:)~ignore_widgets}}; do
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if [[ -n ${ZSH_AUTOSUGGEST_CLEAR_WIDGETS[(r)$widget]} ]]; then
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_zsh_autosuggest_bind_widget $widget clear
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elif [[ -n ${ZSH_AUTOSUGGEST_ACCEPT_WIDGETS[(r)$widget]} ]]; then
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_zsh_autosuggest_bind_widget $widget accept
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elif [[ -n ${ZSH_AUTOSUGGEST_EXECUTE_WIDGETS[(r)$widget]} ]]; then
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_zsh_autosuggest_bind_widget $widget execute
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elif [[ -n ${ZSH_AUTOSUGGEST_PARTIAL_ACCEPT_WIDGETS[(r)$widget]} ]]; then
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_zsh_autosuggest_bind_widget $widget partial_accept
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else
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# Assume any unspecified widget might modify the buffer
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_zsh_autosuggest_bind_widget $widget modify
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fi
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done
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}
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# Given the name of an original widget and args, invoke it, if it exists
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_zsh_autosuggest_invoke_original_widget() {
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# Do nothing unless called with at least one arg
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(( $# )) || return 0
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local original_widget_name="$1"
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shift
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if (( ${+widgets[$original_widget_name]} )); then
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zle $original_widget_name -- $@
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fi
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}
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#--------------------------------------------------------------------#
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# Highlighting #
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#--------------------------------------------------------------------#
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# If there was a highlight, remove it
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_zsh_autosuggest_highlight_reset() {
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typeset -g _ZSH_AUTOSUGGEST_LAST_HIGHLIGHT
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if [[ -n "$_ZSH_AUTOSUGGEST_LAST_HIGHLIGHT" ]]; then
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region_highlight=("${(@)region_highlight:#$_ZSH_AUTOSUGGEST_LAST_HIGHLIGHT}")
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unset _ZSH_AUTOSUGGEST_LAST_HIGHLIGHT
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fi
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}
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# If there's a suggestion, highlight it
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_zsh_autosuggest_highlight_apply() {
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typeset -g _ZSH_AUTOSUGGEST_LAST_HIGHLIGHT
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if (( $#POSTDISPLAY )); then
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typeset -g _ZSH_AUTOSUGGEST_LAST_HIGHLIGHT="$#BUFFER $(($#BUFFER + $#POSTDISPLAY)) $ZSH_AUTOSUGGEST_HIGHLIGHT_STYLE"
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region_highlight+=("$_ZSH_AUTOSUGGEST_LAST_HIGHLIGHT")
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else
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unset _ZSH_AUTOSUGGEST_LAST_HIGHLIGHT
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fi
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}
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#--------------------------------------------------------------------#
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# Autosuggest Widget Implementations #
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#--------------------------------------------------------------------#
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# Disable suggestions
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_zsh_autosuggest_disable() {
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typeset -g _ZSH_AUTOSUGGEST_DISABLED
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_zsh_autosuggest_clear
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}
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# Enable suggestions
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_zsh_autosuggest_enable() {
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unset _ZSH_AUTOSUGGEST_DISABLED
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if (( $#BUFFER )); then
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_zsh_autosuggest_fetch
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fi
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}
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# Toggle suggestions (enable/disable)
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_zsh_autosuggest_toggle() {
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if (( ${+_ZSH_AUTOSUGGEST_DISABLED} )); then
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_zsh_autosuggest_enable
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else
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_zsh_autosuggest_disable
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fi
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}
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# Clear the suggestion
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_zsh_autosuggest_clear() {
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# Remove the suggestion
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unset POSTDISPLAY
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_zsh_autosuggest_invoke_original_widget $@
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}
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# Modify the buffer and get a new suggestion
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_zsh_autosuggest_modify() {
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local -i retval
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# Only available in zsh >= 5.4
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local -i KEYS_QUEUED_COUNT
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# Save the contents of the buffer/postdisplay
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local orig_buffer="$BUFFER"
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local orig_postdisplay="$POSTDISPLAY"
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# Clear suggestion while waiting for next one
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unset POSTDISPLAY
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# Original widget may modify the buffer
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_zsh_autosuggest_invoke_original_widget $@
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retval=$?
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emulate -L zsh
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# Don't fetch a new suggestion if there's more input to be read immediately
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if (( $PENDING > 0 || $KEYS_QUEUED_COUNT > 0 )); then
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POSTDISPLAY="$orig_postdisplay"
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return $retval
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fi
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# Optimize if manually typing in the suggestion or if buffer hasn't changed
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if [[ "$BUFFER" = "$orig_buffer"* && "$orig_postdisplay" = "${BUFFER:$#orig_buffer}"* ]]; then
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POSTDISPLAY="${orig_postdisplay:$(($#BUFFER - $#orig_buffer))}"
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return $retval
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fi
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# Bail out if suggestions are disabled
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if (( ${+_ZSH_AUTOSUGGEST_DISABLED} )); then
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return $?
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fi
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# Get a new suggestion if the buffer is not empty after modification
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if (( $#BUFFER > 0 )); then
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if [[ -z "$ZSH_AUTOSUGGEST_BUFFER_MAX_SIZE" ]] || (( $#BUFFER <= $ZSH_AUTOSUGGEST_BUFFER_MAX_SIZE )); then
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_zsh_autosuggest_fetch
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fi
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fi
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return $retval
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}
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# Fetch a new suggestion based on what's currently in the buffer
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_zsh_autosuggest_fetch() {
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if (( ${+ZSH_AUTOSUGGEST_USE_ASYNC} )); then
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_zsh_autosuggest_async_request "$BUFFER"
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else
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local suggestion
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_zsh_autosuggest_fetch_suggestion "$BUFFER"
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_zsh_autosuggest_suggest "$suggestion"
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fi
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}
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# Offer a suggestion
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_zsh_autosuggest_suggest() {
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emulate -L zsh
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local suggestion="$1"
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if [[ -n "$suggestion" ]] && (( $#BUFFER )); then
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POSTDISPLAY="${suggestion#$BUFFER}"
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else
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unset POSTDISPLAY
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fi
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}
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# Accept the entire suggestion
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_zsh_autosuggest_accept() {
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local -i retval max_cursor_pos=$#BUFFER
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# When vicmd keymap is active, the cursor can't move all the way
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# to the end of the buffer
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if [[ "$KEYMAP" = "vicmd" ]]; then
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max_cursor_pos=$((max_cursor_pos - 1))
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fi
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# If we're not in a valid state to accept a suggestion, just run the
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# original widget and bail out
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if (( $CURSOR != $max_cursor_pos || !$#POSTDISPLAY )); then
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_zsh_autosuggest_invoke_original_widget $@
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return
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fi
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# Only accept if the cursor is at the end of the buffer
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# Add the suggestion to the buffer
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BUFFER="$BUFFER$POSTDISPLAY"
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# Remove the suggestion
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unset POSTDISPLAY
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# Run the original widget before manually moving the cursor so that the
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# cursor movement doesn't make the widget do something unexpected
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_zsh_autosuggest_invoke_original_widget $@
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retval=$?
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# Move the cursor to the end of the buffer
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if [[ "$KEYMAP" = "vicmd" ]]; then
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CURSOR=$(($#BUFFER - 1))
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else
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CURSOR=$#BUFFER
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fi
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return $retval
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}
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# Accept the entire suggestion and execute it
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_zsh_autosuggest_execute() {
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# Add the suggestion to the buffer
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BUFFER="$BUFFER$POSTDISPLAY"
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# Remove the suggestion
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unset POSTDISPLAY
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# Call the original `accept-line` to handle syntax highlighting or
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# other potential custom behavior
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_zsh_autosuggest_invoke_original_widget "accept-line"
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}
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# Partially accept the suggestion
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_zsh_autosuggest_partial_accept() {
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local -i retval cursor_loc
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# Save the contents of the buffer so we can restore later if needed
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local original_buffer="$BUFFER"
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# Temporarily accept the suggestion.
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BUFFER="$BUFFER$POSTDISPLAY"
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# Original widget moves the cursor
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_zsh_autosuggest_invoke_original_widget $@
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retval=$?
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# Normalize cursor location across vi/emacs modes
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cursor_loc=$CURSOR
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if [[ "$KEYMAP" = "vicmd" ]]; then
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cursor_loc=$((cursor_loc + 1))
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fi
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# If we've moved past the end of the original buffer
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if (( $cursor_loc > $#original_buffer )); then
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# Set POSTDISPLAY to text right of the cursor
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POSTDISPLAY="${BUFFER[$(($cursor_loc + 1)),$#BUFFER]}"
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# Clip the buffer at the cursor
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BUFFER="${BUFFER[1,$cursor_loc]}"
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else
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# Restore the original buffer
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BUFFER="$original_buffer"
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fi
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return $retval
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}
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() {
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typeset -ga _ZSH_AUTOSUGGEST_BUILTIN_ACTIONS
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_ZSH_AUTOSUGGEST_BUILTIN_ACTIONS=(
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clear
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fetch
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suggest
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accept
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execute
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enable
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disable
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toggle
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)
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local action
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for action in $_ZSH_AUTOSUGGEST_BUILTIN_ACTIONS modify partial_accept; do
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eval "_zsh_autosuggest_widget_$action() {
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local -i retval
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_zsh_autosuggest_highlight_reset
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_zsh_autosuggest_$action \$@
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retval=\$?
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_zsh_autosuggest_highlight_apply
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zle -R
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return \$retval
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}"
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done
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for action in $_ZSH_AUTOSUGGEST_BUILTIN_ACTIONS; do
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zle -N autosuggest-$action _zsh_autosuggest_widget_$action
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done
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}
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#--------------------------------------------------------------------#
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# Completion Suggestion Strategy #
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#--------------------------------------------------------------------#
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# Fetches a suggestion from the completion engine
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#
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_zsh_autosuggest_capture_postcompletion() {
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# Always insert the first completion into the buffer
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compstate[insert]=1
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# Don't list completions
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unset 'compstate[list]'
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}
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_zsh_autosuggest_capture_completion_widget() {
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# Add a post-completion hook to be called after all completions have been
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# gathered. The hook can modify compstate to affect what is done with the
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# gathered completions.
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local -a +h comppostfuncs
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comppostfuncs=(_zsh_autosuggest_capture_postcompletion)
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# Only capture completions at the end of the buffer
|
|
CURSOR=$#BUFFER
|
|
|
|
# Run the original widget wrapping `.complete-word` so we don't
|
|
# recursively try to fetch suggestions, since our pty is forked
|
|
# after autosuggestions is initialized.
|
|
zle -- ${(k)widgets[(r)completion:.complete-word:_main_complete]}
|
|
|
|
if is-at-least 5.0.3; then
|
|
# Don't do any cr/lf transformations. We need to do this immediately before
|
|
# output because if we do it in setup, onlcr will be re-enabled when we enter
|
|
# vared in the async code path. There is a bug in zpty module in older versions
|
|
# where the tty is not properly attached to the pty slave, resulting in stty
|
|
# getting stopped with a SIGTTOU. See zsh-workers thread 31660 and upstream
|
|
# commit f75904a38
|
|
stty -onlcr -ocrnl -F /dev/tty
|
|
fi
|
|
|
|
# The completion has been added, print the buffer as the suggestion
|
|
echo -nE - $'\0'$BUFFER$'\0'
|
|
}
|
|
|
|
zle -N autosuggest-capture-completion _zsh_autosuggest_capture_completion_widget
|
|
|
|
_zsh_autosuggest_capture_setup() {
|
|
# There is a bug in zpty module in older zsh versions by which a
|
|
# zpty that exits will kill all zpty processes that were forked
|
|
# before it. Here we set up a zsh exit hook to SIGKILL the zpty
|
|
# process immediately, before it has a chance to kill any other
|
|
# zpty processes.
|
|
if ! is-at-least 5.4; then
|
|
zshexit() {
|
|
# The zsh builtin `kill` fails sometimes in older versions
|
|
# https://unix.stackexchange.com/a/477647/156673
|
|
kill -KILL $$ 2>&- || command kill -KILL $$
|
|
|
|
# Block for long enough for the signal to come through
|
|
sleep 1
|
|
}
|
|
fi
|
|
|
|
# Try to avoid any suggestions that wouldn't match the prefix
|
|
zstyle ':completion:*' matcher-list ''
|
|
zstyle ':completion:*' path-completion false
|
|
zstyle ':completion:*' max-errors 0 not-numeric
|
|
|
|
bindkey '^I' autosuggest-capture-completion
|
|
}
|
|
|
|
_zsh_autosuggest_capture_completion_sync() {
|
|
_zsh_autosuggest_capture_setup
|
|
|
|
zle autosuggest-capture-completion
|
|
}
|
|
|
|
_zsh_autosuggest_capture_completion_async() {
|
|
_zsh_autosuggest_capture_setup
|
|
|
|
zmodload zsh/parameter 2>/dev/null || return # For `$functions`
|
|
|
|
# Make vared completion work as if for a normal command line
|
|
# https://stackoverflow.com/a/7057118/154703
|
|
autoload +X _complete
|
|
functions[_original_complete]=$functions[_complete]
|
|
function _complete() {
|
|
unset 'compstate[vared]'
|
|
_original_complete "$@"
|
|
}
|
|
|
|
# Open zle with buffer set so we can capture completions for it
|
|
vared 1
|
|
}
|
|
|
|
_zsh_autosuggest_strategy_completion() {
|
|
# Reset options to defaults and enable LOCAL_OPTIONS
|
|
emulate -L zsh
|
|
|
|
# Enable extended glob for completion ignore pattern
|
|
setopt EXTENDED_GLOB
|
|
|
|
typeset -g suggestion
|
|
local line REPLY
|
|
|
|
# Exit if we don't have completions
|
|
whence compdef >/dev/null || return
|
|
|
|
# Exit if we don't have zpty
|
|
zmodload zsh/zpty 2>/dev/null || return
|
|
|
|
# Exit if our search string matches the ignore pattern
|
|
[[ -n "$ZSH_AUTOSUGGEST_COMPLETION_IGNORE" ]] && [[ "$1" == $~ZSH_AUTOSUGGEST_COMPLETION_IGNORE ]] && return
|
|
|
|
# Zle will be inactive if we are in async mode
|
|
if zle; then
|
|
zpty $ZSH_AUTOSUGGEST_COMPLETIONS_PTY_NAME _zsh_autosuggest_capture_completion_sync
|
|
else
|
|
zpty $ZSH_AUTOSUGGEST_COMPLETIONS_PTY_NAME _zsh_autosuggest_capture_completion_async "\$1"
|
|
zpty -w $ZSH_AUTOSUGGEST_COMPLETIONS_PTY_NAME $'\t'
|
|
fi
|
|
|
|
{
|
|
# The completion result is surrounded by null bytes, so read the
|
|
# content between the first two null bytes.
|
|
zpty -r $ZSH_AUTOSUGGEST_COMPLETIONS_PTY_NAME line '*'$'\0''*'$'\0'
|
|
|
|
# Extract the suggestion from between the null bytes. On older
|
|
# versions of zsh (older than 5.3), we sometimes get extra bytes after
|
|
# the second null byte, so trim those off the end.
|
|
# See http://www.zsh.org/mla/workers/2015/msg03290.html
|
|
suggestion="${${(@0)line}[2]}"
|
|
} always {
|
|
# Destroy the pty
|
|
zpty -d $ZSH_AUTOSUGGEST_COMPLETIONS_PTY_NAME
|
|
}
|
|
}
|
|
|
|
#--------------------------------------------------------------------#
|
|
# History Suggestion Strategy #
|
|
#--------------------------------------------------------------------#
|
|
# Suggests the most recent history item that matches the given
|
|
# prefix.
|
|
#
|
|
|
|
_zsh_autosuggest_strategy_history() {
|
|
# Reset options to defaults and enable LOCAL_OPTIONS
|
|
emulate -L zsh
|
|
|
|
# Enable globbing flags so that we can use (#m) and (x~y) glob operator
|
|
setopt EXTENDED_GLOB
|
|
|
|
# Escape backslashes and all of the glob operators so we can use
|
|
# this string as a pattern to search the $history associative array.
|
|
# - (#m) globbing flag enables setting references for match data
|
|
# TODO: Use (b) flag when we can drop support for zsh older than v5.0.8
|
|
local prefix="${1//(#m)[\\*?[\]<>()|^~#]/\\$MATCH}"
|
|
|
|
# Get the history items that match the prefix, excluding those that match
|
|
# the ignore pattern
|
|
local pattern="$prefix*"
|
|
if [[ -n $ZSH_AUTOSUGGEST_HISTORY_IGNORE ]]; then
|
|
pattern="($pattern)~($ZSH_AUTOSUGGEST_HISTORY_IGNORE)"
|
|
fi
|
|
|
|
# Give the first history item matching the pattern as the suggestion
|
|
# - (r) subscript flag makes the pattern match on values
|
|
typeset -g suggestion="${history[(r)$pattern]}"
|
|
}
|
|
|
|
#--------------------------------------------------------------------#
|
|
# Match Previous Command Suggestion Strategy #
|
|
#--------------------------------------------------------------------#
|
|
# Suggests the most recent history item that matches the given
|
|
# prefix and whose preceding history item also matches the most
|
|
# recently executed command.
|
|
#
|
|
# For example, suppose your history has the following entries:
|
|
# - pwd
|
|
# - ls foo
|
|
# - ls bar
|
|
# - pwd
|
|
#
|
|
# Given the history list above, when you type 'ls', the suggestion
|
|
# will be 'ls foo' rather than 'ls bar' because your most recently
|
|
# executed command (pwd) was previously followed by 'ls foo'.
|
|
#
|
|
# Note that this strategy won't work as expected with ZSH options that don't
|
|
# preserve the history order such as `HIST_IGNORE_ALL_DUPS` or
|
|
# `HIST_EXPIRE_DUPS_FIRST`.
|
|
|
|
_zsh_autosuggest_strategy_match_prev_cmd() {
|
|
# Reset options to defaults and enable LOCAL_OPTIONS
|
|
emulate -L zsh
|
|
|
|
# Enable globbing flags so that we can use (#m) and (x~y) glob operator
|
|
setopt EXTENDED_GLOB
|
|
|
|
# TODO: Use (b) flag when we can drop support for zsh older than v5.0.8
|
|
local prefix="${1//(#m)[\\*?[\]<>()|^~#]/\\$MATCH}"
|
|
|
|
# Get the history items that match the prefix, excluding those that match
|
|
# the ignore pattern
|
|
local pattern="$prefix*"
|
|
if [[ -n $ZSH_AUTOSUGGEST_HISTORY_IGNORE ]]; then
|
|
pattern="($pattern)~($ZSH_AUTOSUGGEST_HISTORY_IGNORE)"
|
|
fi
|
|
|
|
# Get all history event numbers that correspond to history
|
|
# entries that match the pattern
|
|
local history_match_keys
|
|
history_match_keys=(${(k)history[(R)$~pattern]})
|
|
|
|
# By default we use the first history number (most recent history entry)
|
|
local histkey="${history_match_keys[1]}"
|
|
|
|
# Get the previously executed command
|
|
local prev_cmd="$(_zsh_autosuggest_escape_command "${history[$((HISTCMD-1))]}")"
|
|
|
|
# Iterate up to the first 200 history event numbers that match $prefix
|
|
for key in "${(@)history_match_keys[1,200]}"; do
|
|
# Stop if we ran out of history
|
|
[[ $key -gt 1 ]] || break
|
|
|
|
# See if the history entry preceding the suggestion matches the
|
|
# previous command, and use it if it does
|
|
if [[ "${history[$((key - 1))]}" == "$prev_cmd" ]]; then
|
|
histkey="$key"
|
|
break
|
|
fi
|
|
done
|
|
|
|
# Give back the matched history entry
|
|
typeset -g suggestion="$history[$histkey]"
|
|
}
|
|
|
|
#--------------------------------------------------------------------#
|
|
# Fetch Suggestion #
|
|
#--------------------------------------------------------------------#
|
|
# Loops through all specified strategies and returns a suggestion
|
|
# from the first strategy to provide one.
|
|
#
|
|
|
|
_zsh_autosuggest_fetch_suggestion() {
|
|
typeset -g suggestion
|
|
local -a strategies
|
|
local strategy
|
|
|
|
# Ensure we are working with an array
|
|
strategies=(${=ZSH_AUTOSUGGEST_STRATEGY})
|
|
|
|
for strategy in $strategies; do
|
|
# Try to get a suggestion from this strategy
|
|
_zsh_autosuggest_strategy_$strategy "$1"
|
|
|
|
# Ensure the suggestion matches the prefix
|
|
[[ "$suggestion" != "$1"* ]] && unset suggestion
|
|
|
|
# Break once we've found a valid suggestion
|
|
[[ -n "$suggestion" ]] && break
|
|
done
|
|
}
|
|
|
|
#--------------------------------------------------------------------#
|
|
# Async #
|
|
#--------------------------------------------------------------------#
|
|
|
|
_zsh_autosuggest_async_request() {
|
|
zmodload zsh/system 2>/dev/null # For `$sysparams`
|
|
|
|
typeset -g _ZSH_AUTOSUGGEST_ASYNC_FD _ZSH_AUTOSUGGEST_CHILD_PID
|
|
|
|
# If we've got a pending request, cancel it
|
|
if [[ -n "$_ZSH_AUTOSUGGEST_ASYNC_FD" ]] && { true <&$_ZSH_AUTOSUGGEST_ASYNC_FD } 2>/dev/null; then
|
|
# Close the file descriptor and remove the handler
|
|
exec {_ZSH_AUTOSUGGEST_ASYNC_FD}<&-
|
|
zle -F $_ZSH_AUTOSUGGEST_ASYNC_FD
|
|
|
|
# We won't know the pid unless the user has zsh/system module installed
|
|
if (( _ZSH_AUTOSUGGEST_CHILD_PID )); then
|
|
kill -TERM -- $_ZSH_AUTOSUGGEST_CHILD_PID 2>/dev/null
|
|
fi
|
|
fi
|
|
|
|
# Fork a process to fetch a suggestion and open a pipe to read from it
|
|
exec {_ZSH_AUTOSUGGEST_ASYNC_FD}< <(
|
|
# Tell parent process our pid
|
|
echo $sysparams[pid]
|
|
|
|
# Fetch and print the suggestion
|
|
local suggestion
|
|
_zsh_autosuggest_fetch_suggestion "$1"
|
|
echo -nE - "$suggestion"
|
|
)
|
|
|
|
# There's a weird bug here where ^C stops working unless we force a fork
|
|
# See https://github.com/zsh-users/zsh-autosuggestions/issues/364
|
|
autoload -Uz is-at-least
|
|
is-at-least 5.8 || command true
|
|
|
|
# Read the pid from the child process
|
|
read _ZSH_AUTOSUGGEST_CHILD_PID <&$_ZSH_AUTOSUGGEST_ASYNC_FD
|
|
|
|
# Zsh will make a new process group for the child process only if job
|
|
# control is enabled (MONITOR option)
|
|
if [[ -o MONITOR ]]; then
|
|
# If we need to kill the background process in the future, we'll send
|
|
# SIGTERM to the process group to kill any processes that may have been
|
|
# forked by the suggestion strategy
|
|
_ZSH_AUTOSUGGEST_CHILD_PID=${_ZSH_AUTOSUGGEST_CHILD_PID:+-$_ZSH_AUTOSUGGEST_CHILD_PID}
|
|
fi
|
|
|
|
# When the fd is readable, call the response handler
|
|
zle -F "$_ZSH_AUTOSUGGEST_ASYNC_FD" _zsh_autosuggest_async_response
|
|
}
|
|
|
|
# Called when new data is ready to be read from the pipe
|
|
# First arg will be fd ready for reading
|
|
# Second arg will be passed in case of error
|
|
_zsh_autosuggest_async_response() {
|
|
emulate -L zsh
|
|
|
|
local suggestion
|
|
|
|
if [[ $# == 1 || "$2" == "hup" ]]; then
|
|
# Read everything from the fd and give it as a suggestion
|
|
IFS='' read -rd '' -u $1 suggestion
|
|
zle autosuggest-suggest -- "$suggestion"
|
|
|
|
# Close the fd
|
|
exec {1}<&-
|
|
fi
|
|
|
|
# Always remove the handler
|
|
zle -F $1
|
|
}
|
|
|
|
#--------------------------------------------------------------------#
|
|
# Start #
|
|
#--------------------------------------------------------------------#
|
|
|
|
# Start the autosuggestion widgets
|
|
_zsh_autosuggest_start() {
|
|
# By default we re-bind widgets on every precmd to ensure we wrap other
|
|
# wrappers. Specifically, highlighting breaks if our widgets are wrapped by
|
|
# zsh-syntax-highlighting widgets. This also allows modifications to the
|
|
# widget list variables to take effect on the next precmd. However this has
|
|
# a decent performance hit, so users can set ZSH_AUTOSUGGEST_MANUAL_REBIND
|
|
# to disable the automatic re-binding.
|
|
if (( ${+ZSH_AUTOSUGGEST_MANUAL_REBIND} )); then
|
|
add-zsh-hook -d precmd _zsh_autosuggest_start
|
|
fi
|
|
|
|
_zsh_autosuggest_bind_widgets
|
|
}
|
|
|
|
# Mark for auto-loading the functions that we use
|
|
autoload -Uz add-zsh-hook is-at-least
|
|
|
|
# Automatically enable asynchronous mode in newer versions of zsh. Disable for
|
|
# older versions because there is a bug when using async mode where ^C does not
|
|
# work immediately after fetching a suggestion.
|
|
# See https://github.com/zsh-users/zsh-autosuggestions/issues/364
|
|
if is-at-least 5.0.8; then
|
|
typeset -g ZSH_AUTOSUGGEST_USE_ASYNC=
|
|
fi
|
|
|
|
# Start the autosuggestion widgets on the next precmd
|
|
add-zsh-hook precmd _zsh_autosuggest_start
|