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executable file 251 lines (235 sloc) 5.897 kb
#!/bin/sh
USAGE='[start|bad|good|next|reset|visualize|replay|log]'
LONG_USAGE='git bisect start [<pathspec>] 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.
git bisect visualize show bisect status in gitk.
git bisect replay <logfile> replay bisection log
git bisect log show bisect log.'
. git-sh-setup
require_work_tree
sq() {
@@PERL@@ -e '
for (@ARGV) {
s/'\''/'\'\\\\\'\''/g;
print " '\''$_'\''";
}
print "\n";
' "$@"
}
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() {
#
# Verify HEAD. If we were bisecting before this, reset to the
# top-of-line master first!
#
head=$(GIT_DIR="$GIT_DIR" git-symbolic-ref HEAD) ||
die "Bad HEAD - I need a symbolic ref"
case "$head" in
refs/heads/bisect*)
if [ -s "$GIT_DIR/head-name" ]; then
branch=`cat "$GIT_DIR/head-name"`
else
branch=master
fi
git checkout $branch || exit
;;
refs/heads/*)
[ -s "$GIT_DIR/head-name" ] && die "won't bisect on seeked tree"
echo "$head" | sed 's#^refs/heads/##' >"$GIT_DIR/head-name"
;;
*)
die "Bad HEAD - strange symbolic ref"
;;
esac
#
# Get rid of any old bisect state
#
rm -f "$GIT_DIR/refs/heads/bisect"
rm -rf "$GIT_DIR/refs/bisect/"
mkdir "$GIT_DIR/refs/bisect"
{
printf "git-bisect start"
sq "$@"
} >"$GIT_DIR/BISECT_LOG"
sq "$@" >"$GIT_DIR/BISECT_NAMES"
}
bisect_bad() {
bisect_autostart
case "$#" in
0)
rev=$(git-rev-parse --verify HEAD) ;;
1)
rev=$(git-rev-parse --verify "$1") ;;
*)
usage ;;
esac || exit
echo "$rev" >"$GIT_DIR/refs/bisect/bad"
echo "# bad: "$(git-show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
echo "git-bisect bad $rev" >>"$GIT_DIR/BISECT_LOG"
bisect_auto_next
}
bisect_good() {
bisect_autostart
case "$#" in
0) revs=$(git-rev-parse --verify HEAD) || exit ;;
*) revs=$(git-rev-parse --revs-only --no-flags "$@") &&
test '' != "$revs" || die "Bad rev input: $@" ;;
esac
for rev in $revs
do
rev=$(git-rev-parse --verify "$rev") || exit
echo "$rev" >"$GIT_DIR/refs/bisect/good-$rev"
echo "# good: "$(git-show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
echo "git-bisect good $rev" >>"$GIT_DIR/BISECT_LOG"
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 -- $(cat $GIT_DIR/BISECT_NAMES)") || exit
if [ -z "$rev" ]; then
echo "$bad was both good and bad"
exit 1
fi
if [ "$rev" = "$bad" ]; then
echo "$rev is first bad commit"
git-diff-tree --pretty $rev
exit 0
fi
nr=$(eval "git-rev-list $rev $good -- $(cat $GIT_DIR/BISECT_NAMES)" | wc -l) || exit
echo "Bisecting: $nr revisions left to test after this"
echo "$rev" > "$GIT_DIR/refs/heads/new-bisect"
git checkout -q new-bisect || exit
mv "$GIT_DIR/refs/heads/new-bisect" "$GIT_DIR/refs/heads/bisect" &&
GIT_DIR="$GIT_DIR" git-symbolic-ref HEAD refs/heads/bisect
git-show-branch "$rev"
}
bisect_visualize() {
bisect_next_check fail
not=`cd "$GIT_DIR/refs" && echo bisect/good-*`
eval gitk bisect/bad --not $not -- $(cat "$GIT_DIR/BISECT_NAMES")
}
bisect_reset() {
case "$#" in
0) if [ -s "$GIT_DIR/head-name" ]; then
branch=`cat "$GIT_DIR/head-name"`
else
branch=master
fi ;;
1) test -f "$GIT_DIR/refs/heads/$1" || {
echo >&2 "$1 does not seem to be a valid branch"
exit 1
}
branch="$1" ;;
*)
usage ;;
esac
if git checkout "$branch"; then
rm -fr "$GIT_DIR/refs/bisect"
rm -f "$GIT_DIR/refs/heads/bisect" "$GIT_DIR/head-name"
rm -f "$GIT_DIR/BISECT_LOG"
rm -f "$GIT_DIR/BISECT_NAMES"
fi
}
bisect_replay () {
test -r "$1" || {
echo >&2 "cannot read $1 for replaying"
exit 1
}
bisect_reset
while read bisect command rev
do
test "$bisect" = "git-bisect" || continue
case "$command" in
start)
cmd="bisect_start $rev"
eval "$cmd"
;;
good)
echo "$rev" >"$GIT_DIR/refs/bisect/good-$rev"
echo "# good: "$(git-show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
echo "git-bisect good $rev" >>"$GIT_DIR/BISECT_LOG"
;;
bad)
echo "$rev" >"$GIT_DIR/refs/bisect/bad"
echo "# bad: "$(git-show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
echo "git-bisect bad $rev" >>"$GIT_DIR/BISECT_LOG"
;;
*)
echo >&2 "?? what are you talking about?"
exit 1 ;;
esac
done <"$1"
bisect_auto_next
}
case "$#" in
0)
usage ;;
*)
cmd="$1"
shift
case "$cmd" in
start)
bisect_start "$@" ;;
bad)
bisect_bad "$@" ;;
good)
bisect_good "$@" ;;
next)
# Not sure we want "next" at the UI level anymore.
bisect_next "$@" ;;
visualize)
bisect_visualize "$@" ;;
reset)
bisect_reset "$@" ;;
replay)
bisect_replay "$@" ;;
log)
cat "$GIT_DIR/BISECT_LOG" ;;
*)
usage ;;
esac
esac
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