mirror of
https://github.com/git/git.git
synced 2024-12-03 06:53:53 +08:00
6ca8b977e4
Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
459 lines
10 KiB
Bash
Executable File
459 lines
10 KiB
Bash
Executable File
#!/bin/sh
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USAGE='[start|bad|good|skip|next|reset|visualize|replay|log|run]'
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LONG_USAGE='git bisect start [<bad> [<good>...]] [--] [<pathspec>...]
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reset bisect state and start bisection.
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git bisect bad [<rev>]
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mark <rev> a known-bad revision.
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git bisect good [<rev>...]
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mark <rev>... known-good revisions.
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git bisect skip [<rev>...]
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mark <rev>... untestable revisions.
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git bisect next
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find next bisection to test and check it out.
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git bisect reset [<branch>]
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finish bisection search and go back to branch.
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git bisect visualize
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show bisect status in gitk.
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git bisect replay <logfile>
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replay bisection log.
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git bisect log
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show bisect log.
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git bisect run <cmd>...
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use <cmd>... to automatically bisect.'
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. git-sh-setup
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require_work_tree
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sq() {
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@@PERL@@ -e '
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for (@ARGV) {
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s/'\''/'\'\\\\\'\''/g;
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print " '\''$_'\''";
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}
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print "\n";
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' "$@"
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}
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bisect_autostart() {
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test -d "$GIT_DIR/refs/bisect" || {
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echo >&2 'You need to start by "git bisect start"'
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if test -t 0
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then
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echo >&2 -n 'Do you want me to do it for you [Y/n]? '
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read yesno
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case "$yesno" in
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[Nn]*)
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exit ;;
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esac
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bisect_start
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else
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exit 1
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fi
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}
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}
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bisect_start() {
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#
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# Verify HEAD. If we were bisecting before this, reset to the
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# top-of-line master first!
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#
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head=$(GIT_DIR="$GIT_DIR" git symbolic-ref HEAD) ||
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die "Bad HEAD - I need a symbolic ref"
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case "$head" in
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refs/heads/bisect)
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if [ -s "$GIT_DIR/head-name" ]; then
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branch=`cat "$GIT_DIR/head-name"`
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else
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branch=master
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fi
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git checkout $branch || exit
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;;
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refs/heads/*)
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[ -s "$GIT_DIR/head-name" ] && die "won't bisect on seeked tree"
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echo "$head" | sed 's#^refs/heads/##' >"$GIT_DIR/head-name"
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;;
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*)
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die "Bad HEAD - strange symbolic ref"
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;;
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esac
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#
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# Get rid of any old bisect state
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#
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bisect_clean_state
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mkdir "$GIT_DIR/refs/bisect"
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#
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# Check for one bad and then some good revisions.
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#
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has_double_dash=0
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for arg; do
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case "$arg" in --) has_double_dash=1; break ;; esac
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done
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orig_args=$(sq "$@")
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bad_seen=0
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while [ $# -gt 0 ]; do
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arg="$1"
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case "$arg" in
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--)
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shift
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break
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;;
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*)
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rev=$(git rev-parse --verify "$arg^{commit}" 2>/dev/null) || {
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test $has_double_dash -eq 1 &&
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die "'$arg' does not appear to be a valid revision"
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break
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}
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case $bad_seen in
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0) state='bad' ; bad_seen=1 ;;
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*) state='good' ;;
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esac
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bisect_write "$state" "$rev" 'nolog'
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shift
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;;
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esac
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done
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sq "$@" >"$GIT_DIR/BISECT_NAMES"
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echo "git-bisect start$orig_args" >>"$GIT_DIR/BISECT_LOG"
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bisect_auto_next
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}
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bisect_write() {
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state="$1"
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rev="$2"
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nolog="$3"
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case "$state" in
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bad) tag="$state" ;;
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good|skip) tag="$state"-"$rev" ;;
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*) die "Bad bisect_write argument: $state" ;;
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esac
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echo "$rev" >"$GIT_DIR/refs/bisect/$tag"
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echo "# $state: "$(git show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
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test -z "$nolog" && echo "git-bisect $state $rev" >>"$GIT_DIR/BISECT_LOG"
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}
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bisect_state() {
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bisect_autostart
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state=$1
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case "$#,$state" in
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0,*)
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die "Please call 'bisect_state' with at least one argument." ;;
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1,bad|1,good|1,skip)
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rev=$(git rev-parse --verify HEAD) ||
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die "Bad rev input: HEAD"
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bisect_write "$state" "$rev" ;;
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2,bad)
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rev=$(git rev-parse --verify "$2^{commit}") ||
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die "Bad rev input: $2"
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bisect_write "$state" "$rev" ;;
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*,good|*,skip)
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shift
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revs=$(git rev-parse --revs-only --no-flags "$@") &&
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test '' != "$revs" || die "Bad rev input: $@"
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for rev in $revs
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do
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rev=$(git rev-parse --verify "$rev^{commit}") ||
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die "Bad rev commit: $rev^{commit}"
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bisect_write "$state" "$rev"
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done ;;
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*)
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usage ;;
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esac
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bisect_auto_next
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}
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bisect_next_check() {
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missing_good= missing_bad=
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git show-ref -q --verify refs/bisect/bad || missing_bad=t
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test -n "$(git for-each-ref "refs/bisect/good-*")" || missing_good=t
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case "$missing_good,$missing_bad,$1" in
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,,*)
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: have both good and bad - ok
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;;
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*,)
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# do not have both but not asked to fail - just report.
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false
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;;
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t,,good)
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# have bad but not good. we could bisect although
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# this is less optimum.
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echo >&2 'Warning: bisecting only with a bad commit.'
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if test -t 0
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then
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printf >&2 'Are you sure [Y/n]? '
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case "$(read yesno)" in [Nn]*) exit 1 ;; esac
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fi
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: bisect without good...
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;;
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*)
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THEN=''
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test -d "$GIT_DIR/refs/bisect" || {
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echo >&2 'You need to start by "git bisect start".'
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THEN='then '
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}
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echo >&2 'You '$THEN'need to give me at least one good' \
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'and one bad revisions.'
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echo >&2 '(You can use "git bisect bad" and' \
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'"git bisect good" for that.)'
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exit 1 ;;
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esac
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}
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bisect_auto_next() {
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bisect_next_check && bisect_next || :
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}
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filter_skipped() {
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_eval="$1"
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_skip="$2"
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if [ -z "$_skip" ]; then
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eval $_eval
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return
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fi
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# Let's parse the output of:
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# "git rev-list --bisect-vars --bisect-all ..."
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eval $_eval | while read hash line
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do
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case "$VARS,$FOUND,$TRIED,$hash" in
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# We display some vars.
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1,*,*,*) echo "$hash $line" ;;
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# Split line.
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,*,*,---*) ;;
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# We had nothing to search.
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,,,bisect_rev*)
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echo "bisect_rev="
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VARS=1
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;;
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# We did not find a good bisect rev.
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# This should happen only if the "bad"
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# commit is also a "skip" commit.
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,,*,bisect_rev*)
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echo "bisect_rev=$TRIED"
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VARS=1
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;;
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# We are searching.
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,,*,*)
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TRIED="${TRIED:+$TRIED|}$hash"
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case "$_skip" in
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*$hash*) ;;
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*)
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echo "bisect_rev=$hash"
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echo "bisect_tried=\"$TRIED\""
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FOUND=1
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;;
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esac
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;;
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# We have already found a rev to be tested.
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,1,*,bisect_rev*) VARS=1 ;;
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,1,*,*) ;;
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# ???
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*) die "filter_skipped error " \
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"VARS: '$VARS' " \
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"FOUND: '$FOUND' " \
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"TRIED: '$TRIED' " \
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"hash: '$hash' " \
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"line: '$line'"
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;;
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esac
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done
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}
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exit_if_skipped_commits () {
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_tried=$1
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if expr "$_tried" : ".*[|].*" > /dev/null ; then
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echo "There are only 'skip'ped commit left to test."
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echo "The first bad commit could be any of:"
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echo "$_tried" | sed -e 's/[|]/\n/g'
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echo "We cannot bisect more!"
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exit 2
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fi
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}
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bisect_next() {
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case "$#" in 0) ;; *) usage ;; esac
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bisect_autostart
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bisect_next_check good
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skip=$(git for-each-ref --format='%(objectname)' \
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"refs/bisect/skip-*" | tr '[\012]' ' ') || exit
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BISECT_OPT=''
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test -n "$skip" && BISECT_OPT='--bisect-all'
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bad=$(git rev-parse --verify refs/bisect/bad) &&
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good=$(git for-each-ref --format='^%(objectname)' \
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"refs/bisect/good-*" | tr '[\012]' ' ') &&
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eval="git rev-list --bisect-vars $BISECT_OPT $good $bad --" &&
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eval="$eval $(cat "$GIT_DIR/BISECT_NAMES")" &&
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eval=$(filter_skipped "$eval" "$skip") &&
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eval "$eval" || exit
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if [ -z "$bisect_rev" ]; then
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echo "$bad was both good and bad"
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exit 1
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fi
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if [ "$bisect_rev" = "$bad" ]; then
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exit_if_skipped_commits "$bisect_tried"
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echo "$bisect_rev is first bad commit"
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git diff-tree --pretty $bisect_rev
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exit 0
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fi
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# We should exit here only if the "bad"
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# commit is also a "skip" commit (see above).
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exit_if_skipped_commits "$bisect_rev"
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echo "Bisecting: $bisect_nr revisions left to test after this"
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echo "$bisect_rev" >"$GIT_DIR/refs/heads/new-bisect"
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git checkout -q new-bisect || exit
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mv "$GIT_DIR/refs/heads/new-bisect" "$GIT_DIR/refs/heads/bisect" &&
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GIT_DIR="$GIT_DIR" git symbolic-ref HEAD refs/heads/bisect
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git show-branch "$bisect_rev"
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}
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bisect_visualize() {
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bisect_next_check fail
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not=`cd "$GIT_DIR/refs" && echo bisect/good-*`
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eval gitk bisect/bad --not $not -- $(cat "$GIT_DIR/BISECT_NAMES")
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}
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bisect_reset() {
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case "$#" in
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0) if [ -s "$GIT_DIR/head-name" ]; then
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branch=`cat "$GIT_DIR/head-name"`
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else
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branch=master
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fi ;;
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1) git show-ref --verify --quiet -- "refs/heads/$1" ||
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die "$1 does not seem to be a valid branch"
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branch="$1" ;;
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*)
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usage ;;
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esac
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if git checkout "$branch"; then
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rm -f "$GIT_DIR/head-name"
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bisect_clean_state
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fi
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}
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bisect_clean_state() {
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rm -fr "$GIT_DIR/refs/bisect"
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rm -f "$GIT_DIR/refs/heads/bisect"
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rm -f "$GIT_DIR/BISECT_LOG"
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rm -f "$GIT_DIR/BISECT_NAMES"
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rm -f "$GIT_DIR/BISECT_RUN"
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}
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bisect_replay () {
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test -r "$1" || die "cannot read $1 for replaying"
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bisect_reset
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while read bisect command rev
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do
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test "$bisect" = "git-bisect" || continue
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case "$command" in
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start)
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cmd="bisect_start $rev"
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eval "$cmd" ;;
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good|bad|skip)
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bisect_write "$command" "$rev" ;;
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*)
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die "?? what are you talking about?" ;;
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esac
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done <"$1"
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bisect_auto_next
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}
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bisect_run () {
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bisect_next_check fail
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while true
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do
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echo "running $@"
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"$@"
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res=$?
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# Check for really bad run error.
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if [ $res -lt 0 -o $res -ge 128 ]; then
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echo >&2 "bisect run failed:"
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echo >&2 "exit code $res from '$@' is < 0 or >= 128"
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exit $res
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fi
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# Find current state depending on run success or failure.
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# A special exit code of 125 means cannot test.
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if [ $res -eq 125 ]; then
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state='skip'
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elif [ $res -gt 0 ]; then
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state='bad'
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else
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state='good'
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fi
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# We have to use a subshell because "bisect_state" can exit.
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( bisect_state $state > "$GIT_DIR/BISECT_RUN" )
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res=$?
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cat "$GIT_DIR/BISECT_RUN"
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if grep "first bad commit could be any of" "$GIT_DIR/BISECT_RUN" \
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> /dev/null; then
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echo >&2 "bisect run cannot continue any more"
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exit $res
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fi
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if [ $res -ne 0 ]; then
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echo >&2 "bisect run failed:"
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echo >&2 "'bisect_state $state' exited with error code $res"
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exit $res
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fi
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if grep "is first bad commit" "$GIT_DIR/BISECT_RUN" > /dev/null; then
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echo "bisect run success"
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exit 0;
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fi
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done
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}
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case "$#" in
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0)
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usage ;;
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*)
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cmd="$1"
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shift
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case "$cmd" in
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start)
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bisect_start "$@" ;;
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bad|good|skip)
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bisect_state "$cmd" "$@" ;;
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next)
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# Not sure we want "next" at the UI level anymore.
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bisect_next "$@" ;;
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visualize)
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bisect_visualize "$@" ;;
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reset)
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bisect_reset "$@" ;;
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replay)
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bisect_replay "$@" ;;
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log)
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cat "$GIT_DIR/BISECT_LOG" ;;
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run)
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bisect_run "$@" ;;
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*)
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usage ;;
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esac
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esac
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