#!/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.'
+USAGE='[start|bad|good|next|reset|visualize|replay|log|run]'
+LONG_USAGE='git bisect start [<bad> [<good>...]] [--] [<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 bisect run <cmd>...
+ use <cmd>... to automatically bisect.'
. git-sh-setup
require_work_tree
head=$(GIT_DIR="$GIT_DIR" git-symbolic-ref HEAD) ||
die "Bad HEAD - I need a symbolic ref"
case "$head" in
- refs/heads/bisect*)
+ refs/heads/bisect)
if [ -s "$GIT_DIR/head-name" ]; then
branch=`cat "$GIT_DIR/head-name"`
else
#
# Get rid of any old bisect state
#
- rm -f "$GIT_DIR/refs/heads/bisect"
- rm -rf "$GIT_DIR/refs/bisect/"
+ bisect_clean_state
mkdir "$GIT_DIR/refs/bisect"
- {
- printf "git-bisect start"
- sq "$@"
- } >"$GIT_DIR/BISECT_LOG"
+
+ #
+ # Check for one bad and then some good revisions.
+ #
+ has_double_dash=0
+ for arg; do
+ case "$arg" in --) has_double_dash=1; break ;; esac
+ done
+ orig_args=$(sq "$@")
+ bad_seen=0
+ while [ $# -gt 0 ]; do
+ arg="$1"
+ case "$arg" in
+ --)
+ shift
+ break
+ ;;
+ *)
+ rev=$(git-rev-parse --verify "$arg^{commit}" 2>/dev/null) || {
+ test $has_double_dash -eq 1 &&
+ die "'$arg' does not appear to be a valid revision"
+ break
+ }
+ if [ $bad_seen -eq 0 ]; then
+ bad_seen=1
+ bisect_write_bad "$rev"
+ else
+ bisect_write_good "$rev"
+ fi
+ shift
+ ;;
+ esac
+ done
+
sq "$@" >"$GIT_DIR/BISECT_NAMES"
+ echo "git-bisect start$orig_args" >>"$GIT_DIR/BISECT_LOG"
+ bisect_auto_next
}
bisect_bad() {
0)
rev=$(git-rev-parse --verify HEAD) ;;
1)
- rev=$(git-rev-parse --verify "$1") ;;
+ rev=$(git-rev-parse --verify "$1^{commit}") ;;
*)
usage ;;
esac || exit
- echo "$rev" >"$GIT_DIR/refs/bisect/bad"
- echo "# bad: "$(git-show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
+ bisect_write_bad "$rev"
echo "git-bisect bad $rev" >>"$GIT_DIR/BISECT_LOG"
bisect_auto_next
}
+bisect_write_bad() {
+ rev="$1"
+ echo "$rev" >"$GIT_DIR/refs/bisect/bad"
+ echo "# bad: "$(git-show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
+}
+
bisect_good() {
bisect_autostart
case "$#" in
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"
+ rev=$(git-rev-parse --verify "$rev^{commit}") || exit
+ bisect_write_good "$rev"
echo "git-bisect good $rev" >>"$GIT_DIR/BISECT_LOG"
+
done
bisect_auto_next
}
+bisect_write_good() {
+ rev="$1"
+ echo "$rev" >"$GIT_DIR/refs/bisect/good-$rev"
+ echo "# good: "$(git-show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
+}
+
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,$1" in
- no,) false ;;
- no,fail)
- echo >&2 'You need to give me at least one good and one bad revisions.'
- exit 1 ;;
+ missing_good= missing_bad=
+ git show-ref -q --verify refs/bisect/bad || missing_bad=t
+ test -n "$(git for-each-ref "refs/bisect/good-*")" || missing_good=t
+
+ case "$missing_good,$missing_bad,$1" in
+ ,,*)
+ : have both good and bad - ok
+ ;;
+ *,)
+ # do not have both but not asked to fail - just report.
+ false
+ ;;
+ t,,good)
+ # have bad but not good. we could bisect although
+ # this is less optimum.
+ echo >&2 'Warning: bisecting only with a bad commit.'
+ if test -t 0
+ then
+ printf >&2 'Are you sure [Y/n]? '
+ case "$(read yesno)" in [Nn]*) exit 1 ;; esac
+ fi
+ : bisect without good...
+ ;;
*)
- true ;;
+ THEN=''
+ test -d "$GIT_DIR/refs/bisect" || {
+ echo >&2 'You need to start by "git bisect start".'
+ THEN='then '
+ }
+ echo >&2 'You '$THEN'need to give me at least one good' \
+ 'and one bad revisions.'
+ echo >&2 '(You can use "git bisect bad" and' \
+ '"git bisect good" for that.)'
+ exit 1 ;;
esac
}
bisect_next() {
case "$#" in 0) ;; *) usage ;; esac
bisect_autostart
- bisect_next_check fail
+ bisect_next_check good
+
bad=$(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 "$bad was both good and bad"
- exit 1
+ good=$(git for-each-ref --format='^%(objectname)' \
+ "refs/bisect/good-*" | tr '[\012]' ' ') &&
+ eval="git-rev-list --bisect-vars $good $bad --" &&
+ eval="$eval $(cat "$GIT_DIR/BISECT_NAMES")" &&
+ eval=$(eval "$eval") &&
+ eval "$eval" || exit
+
+ if [ -z "$bisect_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 $rev
- exit 0
+ if [ "$bisect_rev" = "$bad" ]; then
+ echo "$bisect_rev is first bad commit"
+ git-diff-tree --pretty $bisect_rev
+ exit 0
fi
- nr=$(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"
+
+ echo "Bisecting: $bisect_nr revisions left to test after this"
+ echo "$bisect_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 "$rev"
+ git-show-branch "$bisect_rev"
}
bisect_visualize() {
else
branch=master
fi ;;
- 1) test -f "$GIT_DIR/refs/heads/$1" || {
+ 1) git-show-ref --verify --quiet -- "refs/heads/$1" || {
echo >&2 "$1 does not seem to be a valid branch"
exit 1
}
usage ;;
esac
if git checkout "$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 "$GIT_DIR/BISECT_NAMES"
+ rm -f "$GIT_DIR/head-name"
+ bisect_clean_state
fi
}
+bisect_clean_state() {
+ rm -fr "$GIT_DIR/refs/bisect"
+ rm -f "$GIT_DIR/refs/heads/bisect"
+ rm -f "$GIT_DIR/BISECT_LOG"
+ rm -f "$GIT_DIR/BISECT_NAMES"
+ rm -f "$GIT_DIR/BISECT_RUN"
+}
+
bisect_replay () {
test -r "$1" || {
echo >&2 "cannot read $1 for replaying"
bisect_auto_next
}
+bisect_run () {
+ bisect_next_check fail
+
+ while true
+ do
+ echo "running $@"
+ "$@"
+ res=$?
+
+ # Check for really bad run error.
+ if [ $res -lt 0 -o $res -ge 128 ]; then
+ echo >&2 "bisect run failed:"
+ echo >&2 "exit code $res from '$@' is < 0 or >= 128"
+ exit $res
+ fi
+
+ # Use "bisect_good" or "bisect_bad"
+ # depending on run success or failure.
+ if [ $res -gt 0 ]; then
+ next_bisect='bisect_bad'
+ else
+ next_bisect='bisect_good'
+ fi
+
+ # We have to use a subshell because bisect_good or
+ # bisect_bad functions can exit.
+ ( $next_bisect > "$GIT_DIR/BISECT_RUN" )
+ res=$?
+
+ cat "$GIT_DIR/BISECT_RUN"
+
+ if [ $res -ne 0 ]; then
+ echo >&2 "bisect run failed:"
+ echo >&2 "$next_bisect exited with error code $res"
+ exit $res
+ fi
+
+ if grep "is first bad commit" "$GIT_DIR/BISECT_RUN" > /dev/null; then
+ echo "bisect run success"
+ exit 0;
+ fi
+
+ done
+}
+
+
case "$#" in
0)
usage ;;
bisect_replay "$@" ;;
log)
cat "$GIT_DIR/BISECT_LOG" ;;
+ run)
+ bisect_run "$@" ;;
*)
usage ;;
esac