Nicolas Pitre <nico@xxxxxxx> writes:
>> Nicolas Pitre <nico@xxxxxxx> writes:
>>
>> > SYNOPSIS
>> >
>> > git-local-arrival <committish>
>> >
>> > DESCRIPTION
>> >
>> > The command displays the time when given commit appeared in the
>> > local repository.
>>
>> This should be certainly doable, but local-arrival may not be
>> interesting if the repository has more than one branches. Maybe
>>
>> git-local-arrival <committish> [<branch>]
>>
>> which defaults to the current branch?
>
> Indeed. I didn't mention it initially because it is really easy to do
> once you have it working for the current branch. The technical
> challenge is about making it efficient to find out which reflog entry
> with a path to given commit is the oldest.
Perhaps bisect it like this. This assumes you never rewind the
branch in question and the tip already contains the commit in
question.
-- >8 --
#!/bin/sh
. git-sh-setup
commit=`git rev-parse "$1"` &&
branch="${2-`git symbolic-ref HEAD`} || exit
contains () {
contains=`git merge-base --all $1 $commit`
case "$LF$contains$LF" in
*"$LF$contains$LF"*)
: ;;
*)
false ;;
esac
}
LF='
'
script='{
s/ .*//
p
}' ;# strip things after TAB if a TAB exists
reflog="$GIT_DIR/logs/refs/heads/$branch";
lo=1;
hi=`wc -l <$reflog`
ld=$hi
while expr "$lo" \< "$hi" >/dev/null
do
mi=`expr \( $hi \+ $lo \) / 2`
line=`sed -ne "$mi$script" "$reflog"`
to=`expr "$line" : '[^ ]* \([^ ]*\) '`
if contains $to
then
ld=$hi
hi=$mi
else
lo=`expr "$mi" + 1`
fi
done
case "$ld" in
'')
echo >&2 Oops
exit 1;;
?*)
line=`sed -ne "$ld$script" "$reflog"`
time=`expr "$line" : '.*> \([0-9]*\) '`
zone=`expr "$line" : '.*> [0-9]* \(.[0-9][0-9][0-9][0-9]\)$'`
echo "$time $zone"
esac
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