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mpv/etc/_mpv.zsh
Niklas Haas ea89e813f7 zsh completion: perform globbing on binary path
When trying to use completion for mpv binaries specified with some shell
glob, e.g. ~/dev/mpv/build/mpv, the current code doesn't substitute the
homedir prefix into the path name, resulting in runtime errors about
the file '~/dev/mpv/build/mpv' not being found.

The simple fixed is to use $~var instead of $var whenever expanding the
filename, which performs the same globbing that would otherwise be
performed when executing the command.
2021-05-07 22:18:23 +02:00

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#compdef mpv
# ZSH completion for mpv
#
# For customization, see:
# https://github.com/mpv-player/mpv/wiki/Zsh-completion-customization
#
# This file is part of mpv.
#
# mpv is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# mpv is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with mpv. If not, see <http://www.gnu.org/licenses/>.
#
local curcontext="$curcontext" state state_descr line
typeset -A opt_args
local -a match mbegin mend
local MATCH MBEGIN MEND
# By default, don't complete URLs unless no files match
local -a tag_order
zstyle -a ":completion:*:*:$service:*" tag-order tag_order ||
zstyle ":completion:*:*:$service:*" tag-order '!urls'
typeset -ga _mpv_completion_arguments _mpv_completion_protocols
function _mpv_generate_arguments {
_mpv_completion_arguments=()
local -a option_aliases=()
local list_options_line
for list_options_line in "${(@f)$($~words[1] --list-options)}"; do
[[ $list_options_line =~ $'^[ \t]+--([^ \t]+)[ \t]*(.*)' ]] || continue
local name=$match[1] desc=$match[2]
if [[ $desc == Flag* ]]; then
_mpv_completion_arguments+="$name"
if [[ $name != (\{|\}|v|list-options) ]]; then
# Negated version
_mpv_completion_arguments+="no-$name"
fi
elif [[ -z $desc ]]; then
# Sub-option for list option
if [[ $name == *-(clr|help) ]]; then
# Like a flag
_mpv_completion_arguments+="$name"
else
# Find the parent option and use that with this option's name
_mpv_completion_arguments+="${_mpv_completion_arguments[(R)${name%-*}=*]/*=/$name=}"
fi
elif [[ $desc == Print* ]]; then
_mpv_completion_arguments+="$name"
elif [[ $desc =~ $'^alias for (--)?([^ \t]+)' ]]; then
# Save this for later; we might not have parsed the target option yet
option_aliases+="$name $match[2]"
else
# Option takes argument
local entry="$name=-:${desc//:/\\:}:"
if [[ $desc =~ '^Choices: ([^(]*)' ]]; then
local -a choices=(${(s: :)match[1]})
entry+="($choices)"
# If "no" is one of the choices, it can also be negated like a flag
# (--no-whatever is equivalent to --whatever=no).
if (( ${+choices[(r)no]} )); then
_mpv_completion_arguments+="no-$name"
fi
elif [[ $desc == *'[file]'* ]]; then
entry+='->files'
elif [[ $name == (ao|vo|af|vf|profile|audio-device|vulkan-device) ]]; then
entry+="->parse-help-$name"
elif [[ $name == show-profile ]]; then
entry+="->parse-help-profile"
fi
_mpv_completion_arguments+="$entry"
fi
done
# Process aliases
local to_from real_name arg_spec
for to_from in $option_aliases; do
# to_from='alias-name real-name'
real_name=${to_from##* }
for arg_spec in "$real_name" "$real_name=*" "no-$real_name"; do
arg_spec=${_mpv_completion_arguments[(r)$arg_spec]}
[[ -n $arg_spec ]] &&
_mpv_completion_arguments+="${arg_spec/$real_name/${to_from%% *}}"
done
done
# Older versions of zsh have a bug where they won't complete an option listed
# after one that's a prefix of it. To work around this, we can sort the
# options by length, longest first, so that any prefix of an option will be
# listed after it. On newer versions of zsh where the bug is fixed, we skip
# this to avoid slowing down the first tab press any more than we have to.
autoload -Uz is-at-least
if ! is-at-least 5.2; then
# If this were a real language, we wouldn't have to sort by prepending the
# length, sorting the whole thing numerically, and then removing it again.
local -a sort_tmp=()
for arg_spec in $_mpv_completion_arguments; do
sort_tmp+=${#arg_spec%%=*}_$arg_spec
done
_mpv_completion_arguments=(${${(On)sort_tmp}/#*_})
fi
}
function _mpv_generate_protocols {
_mpv_completion_protocols=()
local list_protos_line
for list_protos_line in "${(@f)$($~words[1] --list-protocols)}"; do
if [[ $list_protos_line =~ $'^[ \t]+(.*)' ]]; then
_mpv_completion_protocols+="$match[1]"
fi
done
}
function _mpv_generate_if_changed {
# Called with $1 = 'arguments' or 'protocols'. Generates the respective list
# on the first run and re-generates it if the executable being completed for
# is different than the one we used to generate the cached list.
typeset -gA _mpv_completion_binary
local current_binary=${~words[1]:c}
zmodload -F zsh/stat b:zstat
current_binary+=T$(zstat +mtime $current_binary)
if [[ $_mpv_completion_binary[$1] != $current_binary ]]; then
# Use PCRE for regular expression matching if possible. This approximately
# halves the execution time of generate_arguments compared to the default
# POSIX regex, which translates to a more responsive first tab press.
# However, we can't rely on PCRE being available, so we keep all our
# patterns POSIX-compatible.
zmodload -s -F zsh/pcre C:pcre-match && setopt re_match_pcre
_mpv_generate_$1
_mpv_completion_binary[$1]=$current_binary
fi
}
# Only consider generating arguments if the argument being completed looks like
# an option. This way, the user should never see a delay when just completing a
# filename.
if [[ $words[$CURRENT] == -* ]]; then
_mpv_generate_if_changed arguments
fi
local rc=1
_arguments -C -S \*--$_mpv_completion_arguments '*:files:->mfiles' && rc=0
case $state in
parse-help-*)
local option_name=${state#parse-help-}
# Can't do non-capturing groups without pcre, so we index the ones we want
local pattern name_group=1 desc_group=2
case $option_name in
audio-device|vulkan-device)
pattern=$'^[ \t]+'\''([^'\'']*)'\'$'[ \t]+''\((.*)\)'
;;
profile)
# The generic pattern would actually work in most cases for --profile,
# but would break if a profile name contained spaces. This stricter one
# only breaks if a profile name contains tabs.
pattern=$'^\t([^\t]*)\t(.*)'
;;
*)
pattern=$'^[ \t]+(--'${option_name}$'=)?([^ \t]+)[ \t]*[-:]?[ \t]*(.*)'
name_group=2 desc_group=3
;;
esac
local -a values
local current
for current in "${(@f)$($~words[1] --${option_name}=help)}"; do
[[ $current =~ $pattern ]] || continue;
local name=${match[name_group]//:/\\:} desc=${match[desc_group]}
if [[ -n $desc ]]; then
values+="${name}:${desc}"
else
values+="${name}"
fi
done
(( $#values )) && {
compset -P '*,'
compset -S ',*'
_describe "$state_descr" values -r ',=: \t\n\-' && rc=0
}
;;
files)
compset -P '*,'
compset -S ',*'
_files -r ',/ \t\n\-' && rc=0
;;
mfiles)
local expl
_tags files urls
while _tags; do
_requested files expl 'media file' _files && rc=0
if _requested urls; then
while _next_label urls expl URL; do
_urls "$expl[@]" && rc=0
_mpv_generate_if_changed protocols
compadd -S '' "$expl[@]" $_mpv_completion_protocols && rc=0
done
fi
(( rc )) || return 0
done
;;
esac
return rc