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#!/bin/sh
. git-sh-setup-script || dir "Not a git archive"
usage() {
echo >&2 'usage: git bisect [start | bad | good | next | reset]
git bisect start reset bisect state and start bisection.
git bisect bad [<rev>] mark <rev> a known-bad revision.
git bisect good [<rev>...] mark <rev>... known-good revisions.
git bisect next find next bisection to test and check it out.
git bisect reset [<branch>] finish bisection search and go back to branch.'
exit 1
}
bisect_autostart() {
test -d "$GIT_DIR/refs/bisect" || {
echo >&2 'You need to start by "git bisect start"'
if test -t 0
then
echo >&2 -n 'Do you want me to do it for you [Y/n]? '
read yesno
case "$yesno" in
[Nn]*)
exit ;;
esac
bisect_start
else
exit 1
fi
}
}
bisect_start() {
case "$#" in 0) ;; *) usage ;; esac
#
# Verify HEAD. If we were bisecting before this, reset to the
# top-of-line master first!
#
head=$(readlink $GIT_DIR/HEAD) || die "Bad HEAD - I need a symlink"
case "$head" in
refs/heads/bisect*)
git checkout master || exit
;;
refs/heads/*)
;;
*)
die "Bad HEAD - strange symlink"
;;
esac
#
# Get rid of any old bisect state
#
rm -f "$GIT_DIR/refs/heads/bisect"
rm -rf "$GIT_DIR/refs/bisect/"
mkdir "$GIT_DIR/refs/bisect"
}
bisect_bad() {
bisect_autostart
case "$#" in 0 | 1) ;; *) usage ;; esac
rev=$(git-rev-parse --revs-only --verify --default HEAD "$@") || exit
echo "$rev" > "$GIT_DIR/refs/bisect/bad"
bisect_auto_next
}
bisect_good() {
bisect_autostart
case "$#" in
0) revs=$(git-rev-parse --verify HEAD) || exit ;;
*) revs=$(git-rev-parse --revs-only "$@") || exit ;;
esac
for rev in $revs
do
echo "$rev" >"$GIT_DIR/refs/bisect/good-$rev"
done
bisect_auto_next
}
bisect_next_check() {
next_ok=no
test -f "$GIT_DIR/refs/bisect/bad" &&
case "$(cd "$GIT_DIR" && echo refs/bisect/good-*)" in
refs/bisect/good-\*) ;;
*) next_ok=yes ;;
esac
case "$next_ok,$1" in
no,) false ;;
no,fail)
echo >&2 'You need to give me at least one good and one bad revisions.'
exit 1 ;;
*)
true ;;
esac
}
bisect_auto_next() {
bisect_next_check && bisect_next
}
bisect_next() {
case "$#" in 0) ;; *) usage ;; esac
bisect_autostart
bisect_next_check fail
bad=$(git-rev-parse --verify refs/bisect/bad) &&
good=$(git-rev-parse --sq --revs-only --not \
$(cd "$GIT_DIR" && ls refs/bisect/good-*)) &&
rev=$(eval "git-rev-list --bisect $good $bad") || exit
nr=$(eval "git-rev-list $rev $good" | wc -l) || exit
if [ "$nr" -le "1" ]; then
echo "$rev is first bad commit"
git-diff-tree --pretty $rev
exit 0
fi
echo "Bisecting: $nr revisions left to test after this"
echo "$rev" > "$GIT_DIR/refs/heads/new-bisect"
git checkout new-bisect || exit
mv "$GIT_DIR/refs/heads/new-bisect" "$GIT_DIR/refs/heads/bisect" &&
ln -sf refs/heads/bisect "$GIT_DIR/HEAD"
}
bisect_reset() {
case "$#" in
0) branch=master ;;
1) test -f "$GIT_DIR/refs/heads/$1" || {
echo >&2 "$1 does not seem to be a valid branch"
exit 1
}
branch="$1" ;;
*)
usage ;;
esac
git checkout "$branch" &&
rm -fr "$GIT_DIR/refs/bisect"
rm -f "$GIT_DIR/refs/reads/bisect"
}
case "$#" in
0)
usage ;;
*)
cmd="$1"
shift
case "$cmd" in
start)
bisect_start "$@" ;;
bad)
bisect_bad "$@" ;;
good)
bisect_good "$@" ;;
next)
# Not sure we want "next" at the UI level anymore.
bisect_next "$@" ;;
reset)
bisect_reset "$@" ;;
*)
usage ;;
esac
esac
|
