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SCRIPTS: git-show-backports: add -H to use the hash of the commit message

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Sometimes certain commits don't contain useful tracking information but
we'd still like to be able to report them. Here we implement a hash on
the author's name, e-mail and date, the subject and the body before the
first s-o-b or cherry-picked line. These parts are supposed to be
reasonable invariant across backports and are usable to compute an
invariant hash of a given commit. When we don't find ancestry in a
commit, we try this method (if -H is specified) to compare commits
hashes and we can report a match. The equivalent commit is reported
as "XXXX+?" to indicate that it's an apparent backport but we don't
know how far it goes.
This commit is contained in:
Willy Tarreau 2016-12-14 16:44:45 +01:00
parent b684cd4642
commit 5e637e556d
1 changed files with 24 additions and 2 deletions
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26
scripts/git-show-backports
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@ -28,7 +28,7 @@
# show-backports -q -m -r hapee-r2 hapee-r1
USAGE="Usage: ${0##*/} [-q] [-m] [-u] [-r reference] [-l logexpr] [-s subject] [-b base] {branch|range} [...]"
USAGE="Usage: ${0##*/} [-q] [-H] [-m] [-u] [-r reference] [-l logexpr] [-s subject] [-b base] {branch|range} [...]"
BASES=( )
BRANCHES=( )
REF=master
@ -38,6 +38,7 @@ LOGEXPR=
SUBJECT=
MISSING=
UPSTREAM=
BODYHASH=
die() {
[ "$#" -eq 0 ] || echo "$*" >&2
@ -75,10 +76,12 @@ dump_commit_matrix() {
upstream="none"
missing=0
refbhash=""
line=""
for branch in "${BRANCHES[@]}"; do
set -- $(grep -m 1 $ref "$WORK/${branch//\//_}")
newhash=$1 ; shift
bhash=""
# count the number of cherry-picks after this one. Since we shift,
# the result is in "$#"
while [ -n "$1" -a "$1" != "$ref" ]; do
@ -108,6 +111,19 @@ dump_commit_matrix() {
break
fi
done
if [ -z "$newhash" -a -n "$BODYHASH" ]; then
if [ -z "$refbhash" ]; then
refbhash=$(git log -1 --pretty="%an|%ae|%at|%B" "$ref" | sed -n '/^\(Signed-off-by\|(cherry picked\)/q;p' | md5sum)
fi
set -- $(grep -m 1 "H$refbhash\$" "$WORK/${branch//\//_}")
newhash=$1 ; shift
if [ -n "$newhash" ]; then
line="${line} $(short $newhash)+?"
break
fi
fi
if [ -z "$newhash" ]; then
line="${line} -"
missing=1
@ -136,6 +152,7 @@ while [ -n "$1" -a -z "${1##-*}" ]; do
-q) QUIET=1 ; shift ;;
-m) MISSING=1 ; shift ;;
-u) UPSTREAM=1 ; shift ;;
-H) BODYHASH=1 ; shift ;;
-h|--help) quit "$USAGE" ;;
*) die "$USAGE" ;;
esac
@ -194,8 +211,13 @@ while [ $branch_num -lt "${#BRANCHES[@]}" ]; do
base="${base:-$BASE}"
rm -f "$WORK/${branch//\//_}"
git log --reverse --pretty="%H %s" "$base".."$branch" | grep "${SUBJECT}" | while read h subject; do
echo "$h" $(git log -1 --pretty --format=%B "$h" | \
echo -n "$h" $(git log -1 --pretty --format=%B "$h" | \
sed -n 's/^commit \([^)]*\) upstream\.$/\1/p;s/^(cherry picked from commit \([^)]*\))/\1/p')
if [ -n "$BODYHASH" ]; then
echo " H$(git log -1 --pretty="%an|%ae|%at|%B" "$h" | sed -n '/^\(Signed-off-by\|(cherry picked\)/q;p' | md5sum)"
else
echo
fi
done > "$WORK/${branch//\//_}"
(( branch_num++ ))
done