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38624: _git: Optimize the last commit's __git_recent_branches__names as suggested by Matthew.

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Daniel Shahaf 2016-06-07 06:20:40 +00:00
parent 6e834587eb
commit 0516736eae
2 changed files with 12 additions and 24 deletions
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3
ChangeLog
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@ -1,5 +1,8 @@
2016-06-07 Daniel Shahaf <d.s@daniel.shahaf.name> 2016-06-07 Daniel Shahaf <d.s@daniel.shahaf.name>
* 38624: Completion/Unix/Command/_git: Optimize the last commit's
__git_recent_branches__names as suggested by Matthew.
* 38592 (plus tweak): Completion/Unix/Command/_git: New recent * 38592 (plus tweak): Completion/Unix/Command/_git: New recent
branches completion, unused. (Joint with Nils Luxton) branches completion, unused. (Joint with Nils Luxton)

33
Completion/Unix/Command/_git
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@ -5645,30 +5645,15 @@ __git_commit_objects_prefer_recent () {
(( $+functions[__git_recent_branches__names] )) || (( $+functions[__git_recent_branches__names] )) ||
__git_recent_branches__names() __git_recent_branches__names()
{ {
local -a reflog # This parameter expansion does the following:
local reflog_subject # 1. Obtains the last 1000 'checkout' operations from the reflog
local new_head # 2. Extracts the move-source from each
local -A seen # 3. Eliminates duplicates
reply=() # 4. Eliminates commit hashes (leaving only ref names)
#
reflog=(${(ps:\0:)"$(_call_program reflog git reflog -1000 -z --grep-reflog='\^checkout:\ moving\ from\ ' --pretty='%gs' 2>/dev/null)"}) # See workers/38592 for an equivalent long-hand implementation, and the rest
for reflog_subject in $reflog; do # of that thread for why this implementation was chosen instead.
new_head=${${=reflog_subject}[4]} reply=(${${(u)${${(0)"$(_call_program reflog git reflog -1000 -z --grep-reflog='\^checkout:\ moving\ from\ ' --pretty='%gs')"}#checkout: moving from }%% *}:#[[:xdigit:]](#c40)})
# Skip values added in previous iterations.
if (( ${+seen[$new_head]} )); then
continue
fi
seen[$new_head]="" # value is ignored
# Filter out hashes, to leave only ref names.
if [[ $new_head =~ '^[0-9a-f]{40}$' ]]; then
continue
fi
# All checks passed. Add it.
reply+=( $new_head )
done
} }
(( $+functions[__git_recent_branches] )) || (( $+functions[__git_recent_branches] )) ||