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git completions: Make checking aliases faster

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See #4117.
This commit is contained in:
Fabian Homborg 2017-06-11 21:38:57 +02:00
parent 0ed2af464c
commit 1a135aa0b0
1 changed files with 21 additions and 3 deletions
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24
share/completions/git.fish
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@ -130,6 +130,24 @@ function __fish_git_needs_command
return 1
end
# HACK: Aliases
# Git allows aliases, so we need to see what command the current command-token corresponds to
# (so we can complete e.g. `lg` like `log`).
# Checking `git config` for a lot of aliases can be quite slow if it is called
# for every possible command.
# Ideally, we'd `complete --wraps` this, but that is not currently possible, as is
# using `complete -C` like
# complete -c git -n '__fish_git_using_command lg' -a '(complete -C"git log ")'
#
# So instead, we store the aliases in global variables, named after the alias, containing the command.
# This is because alias:command is an n:1 mapping (an alias can only have one corresponding command,
# but a command can be aliased multiple times)
git config -z --get-regexp 'alias\..*' | while read -lz alias command _
set alias (string replace 'alias.' '' -- $alias)
set -g __fish_git_alias_$alias $command
end
function __fish_git_using_command
set -l cmd (__fish_git_needs_command)
test -z "$cmd"
@ -137,9 +155,9 @@ function __fish_git_using_command
contains -- $cmd $argv
and return 0
# aliased command
set -l aliased (command git config --get "alias.$cmd" ^/dev/null | string split " ")
contains -- "$aliased[1]" $argv
# Check aliases.
set -l varname __fish_git_alias_$cmd
contains -- "$$varname" $argv
and return 0
return 1
end