3 USAGE='[help|start|bad|good|skip|next|reset|visualize|replay|log|run]'
4 LONG_USAGE='git bisect help
5 print this long help message.
6 git bisect start [<bad> [<good>...]] [--] [<pathspec>...]
7 reset bisect state and start bisection.
9 mark <rev> a known-bad revision.
10 git bisect good [<rev>...]
11 mark <rev>... known-good revisions.
12 git bisect skip [(<rev>|<range>)...]
13 mark <rev>... untestable revisions.
15 find next bisection to test and check it out.
16 git bisect reset [<branch>]
17 finish bisection search and go back to branch.
19 show bisect status in gitk.
20 git bisect replay <logfile>
24 git bisect run <cmd>...
25 use <cmd>... to automatically bisect.
27 Please use "git help bisect" to get the full man page.'
33 _x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
34 _x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40"
37 test -s "$GIT_DIR/BISECT_START" || {
38 echo >&2 'You need to start by "git bisect start"'
41 echo >&2 -n 'Do you want me to do it for you [Y/n]? '
58 head=$(GIT_DIR="$GIT_DIR" git symbolic-ref -q HEAD) ||
59 head=$(GIT_DIR="$GIT_DIR" git rev-parse --verify HEAD) ||
60 die "Bad HEAD - I need a HEAD"
63 # Check if we are bisecting.
66 if test -s "$GIT_DIR/BISECT_START"
68 # Reset to the rev from where we started.
69 start_head=$(cat "$GIT_DIR/BISECT_START")
70 git checkout "$start_head" -- || exit
72 # Get rev from where we start.
75 # This error message should only be triggered by
76 # cogito usage, and cogito users should understand
77 # it relates to cg-seek.
78 [ -s "$GIT_DIR/head-name" ] &&
79 die "won't bisect on seeked tree"
80 start_head="${head#refs/heads/}"
83 die "Bad HEAD - strange symbolic ref"
89 # Get rid of any old bisect state.
91 bisect_clean_state || exit
94 # Check for one bad and then some good revisions.
98 case "$arg" in --) has_double_dash=1; break ;; esac
100 orig_args=$(git rev-parse --sq-quote "$@")
103 while [ $# -gt 0 ]; do
111 rev=$(git rev-parse -q --verify "$arg^{commit}") || {
112 test $has_double_dash -eq 1 &&
113 die "'$arg' does not appear to be a valid revision"
117 0) state='bad' ; bad_seen=1 ;;
120 eval="$eval bisect_write '$state' '$rev' 'nolog'; "
128 # In case of mistaken revs or checkout error, or signals received,
129 # "bisect_auto_next" below may exit or misbehave.
130 # We have to trap this to be able to clean up using
131 # "bisect_clean_state".
133 trap 'bisect_clean_state' 0
134 trap 'exit 255' 1 2 3 15
137 # Write new start state.
139 echo "$start_head" >"$GIT_DIR/BISECT_START" &&
140 git rev-parse --sq-quote "$@" >"$GIT_DIR/BISECT_NAMES" &&
142 echo "git bisect start$orig_args" >>"$GIT_DIR/BISECT_LOG" || exit
144 # Check if we can proceed to the next bisect state.
157 good|skip) tag="$state"-"$rev" ;;
158 *) die "Bad bisect_write argument: $state" ;;
160 git update-ref "refs/bisect/$tag" "$rev" || exit
161 echo "# $state: $(git show-branch $rev)" >>"$GIT_DIR/BISECT_LOG"
162 test -n "$nolog" || echo "git bisect $state $rev" >>"$GIT_DIR/BISECT_LOG"
166 test -f "$GIT_DIR/BISECT_EXPECTED_REV" &&
167 test "$1" = $(cat "$GIT_DIR/BISECT_EXPECTED_REV")
170 mark_expected_rev() {
171 echo "$1" > "$GIT_DIR/BISECT_EXPECTED_REV"
174 check_expected_revs() {
176 if ! is_expected_rev "$_rev"; then
177 rm -f "$GIT_DIR/BISECT_ANCESTORS_OK"
178 rm -f "$GIT_DIR/BISECT_EXPECTED_REV"
190 revs=$(git rev-list "$arg") || die "Bad rev input: $arg" ;;
192 revs=$(git rev-parse --sq-quote "$arg") ;;
196 eval bisect_state 'skip' $all
204 die "Please call 'bisect_state' with at least one argument." ;;
206 rev=$(git rev-parse --verify HEAD) ||
207 die "Bad rev input: HEAD"
208 bisect_write "$state" "$rev"
209 check_expected_revs "$rev" ;;
215 sha=$(git rev-parse --verify "$rev^{commit}") ||
216 die "Bad rev input: $rev"
217 eval="$eval bisect_write '$state' '$sha'; "
220 check_expected_revs "$@" ;;
222 die "'git bisect bad' can take only one argument." ;;
229 bisect_next_check() {
230 missing_good= missing_bad=
231 git show-ref -q --verify refs/bisect/bad || missing_bad=t
232 test -n "$(git for-each-ref "refs/bisect/good-*")" || missing_good=t
234 case "$missing_good,$missing_bad,$1" in
236 : have both good and bad - ok
239 # do not have both but not asked to fail - just report.
243 # have bad but not good. we could bisect although
244 # this is less optimum.
245 echo >&2 'Warning: bisecting only with a bad commit.'
248 printf >&2 'Are you sure [Y/n]? '
250 case "$yesno" in [Nn]*) exit 1 ;; esac
252 : bisect without good...
256 test -s "$GIT_DIR/BISECT_START" || {
257 echo >&2 'You need to start by "git bisect start".'
260 echo >&2 'You '$THEN'need to give me at least one good' \
261 'and one bad revisions.'
262 echo >&2 '(You can use "git bisect bad" and' \
263 '"git bisect good" for that.)'
269 bisect_next_check && bisect_next || :
275 echo "Bisecting: $_msg"
276 mark_expected_rev "$_rev"
277 git checkout -q "$_rev" -- || exit
278 git show-branch "$_rev"
284 case "$_list" in *$_rev*) return 0 ;; esac
288 handle_bad_merge_base() {
291 if is_expected_rev "$_badmb"; then
293 The merge base $_badmb is bad.
294 This means the bug has been fixed between $_badmb and [$_good].
299 Some good revs are not ancestor of the bad rev.
300 git bisect cannot work properly in this case.
301 Maybe you mistake good and bad revs?
307 handle_skipped_merge_base() {
312 Warning: the merge base between $_bad and [$_good] must be skipped.
313 So we cannot be sure the first bad commit is between $_mb and $_bad.
319 # "check_merge_bases" checks that merge bases are not "bad".
321 # - If one is "good", that's good, we have nothing to do.
322 # - If one is "bad", it means the user assumed something wrong
324 # - If one is "skipped", we can't know but we should warn.
325 # - If we don't know, we should check it out and ask the user to test.
327 # In the last case we will return 1, and otherwise 0.
329 check_merge_bases() {
333 for _mb in $(git merge-base --all $_bad $_good)
335 if is_among "$_mb" "$_good"; then
337 elif test "$_mb" = "$_bad"; then
338 handle_bad_merge_base "$_bad" "$_good"
339 elif is_among "$_mb" "$_skip"; then
340 handle_skipped_merge_base "$_mb" "$_bad" "$_good"
342 bisect_checkout "$_mb" "a merge base must be tested"
350 # "check_good_are_ancestors_of_bad" checks that all "good" revs are
351 # ancestor of the "bad" rev.
353 # If that's not the case, we need to check the merge bases.
354 # If a merge base must be tested by the user we return 1 and
357 check_good_are_ancestors_of_bad() {
358 test -f "$GIT_DIR/BISECT_ANCESTORS_OK" &&
362 _good=$(echo $2 | sed -e 's/\^//g')
365 # Bisecting with no good rev is ok
366 test -z "$_good" && return
368 _side=$(git rev-list $_good ^$_bad)
369 if test -n "$_side"; then
370 # Return if a checkout was done
371 check_merge_bases "$_bad" "$_good" "$_skip" || return
374 : > "$GIT_DIR/BISECT_ANCESTORS_OK"
380 case "$#" in 0) ;; *) usage ;; esac
382 bisect_next_check good
384 # Get bad, good and skipped revs
385 bad=$(git rev-parse --verify refs/bisect/bad) &&
386 good=$(git for-each-ref --format='^%(objectname)' \
387 "refs/bisect/good-*" | tr '\012' ' ') &&
388 skip=$(git for-each-ref --format='%(objectname)' \
389 "refs/bisect/skip-*" | tr '\012' ' ') || exit
391 # Maybe some merge bases must be tested first
392 check_good_are_ancestors_of_bad "$bad" "$good" "$skip"
393 # Return now if a checkout has already been done
394 test "$?" -eq "1" && return
396 # Perform bisection computation, display and checkout
397 git bisect--helper --next-exit
400 # Check if we should exit because bisection is finished
401 test $res -eq 10 && exit 0
403 # Check for an error in the bisection process
404 test $res -ne 0 && exit $res
410 bisect_next_check fail
414 case "${DISPLAY+set}${SESSIONNAME+set}${MSYSTEM+set}${SECURITYSESSIONID+set}" in
421 -*) set git log "$@" ;;
426 not=$(git for-each-ref --format='%(refname)' "refs/bisect/good-*")
427 eval '"$@"' refs/bisect/bad --not $not -- $(cat "$GIT_DIR/BISECT_NAMES")
431 test -s "$GIT_DIR/BISECT_START" || {
432 echo "We are not bisecting."
436 0) branch=$(cat "$GIT_DIR/BISECT_START") ;;
437 1) git show-ref --verify --quiet -- "refs/heads/$1" ||
438 die "$1 does not seem to be a valid branch"
443 git checkout "$branch" -- && bisect_clean_state
446 bisect_clean_state() {
447 # There may be some refs packed during bisection.
448 git for-each-ref --format='%(refname) %(objectname)' refs/bisect/\* |
451 git update-ref -d $ref $hash || exit
453 rm -f "$GIT_DIR/BISECT_EXPECTED_REV" &&
454 rm -f "$GIT_DIR/BISECT_ANCESTORS_OK" &&
455 rm -f "$GIT_DIR/BISECT_LOG" &&
456 rm -f "$GIT_DIR/BISECT_NAMES" &&
457 rm -f "$GIT_DIR/BISECT_RUN" &&
458 # Cleanup head-name if it got left by an old version of git-bisect
459 rm -f "$GIT_DIR/head-name" &&
461 rm -f "$GIT_DIR/BISECT_START"
465 test -r "$1" || die "cannot read $1 for replaying"
467 while read git bisect command rev
469 test "$git $bisect" = "git bisect" -o "$git" = "git-bisect" || continue
470 if test "$git" = "git-bisect"; then
476 cmd="bisect_start $rev"
479 bisect_write "$command" "$rev" ;;
481 die "?? what are you talking about?" ;;
488 bisect_next_check fail
496 # Check for really bad run error.
497 if [ $res -lt 0 -o $res -ge 128 ]; then
498 echo >&2 "bisect run failed:"
499 echo >&2 "exit code $res from '$@' is < 0 or >= 128"
503 # Find current state depending on run success or failure.
504 # A special exit code of 125 means cannot test.
505 if [ $res -eq 125 ]; then
507 elif [ $res -gt 0 ]; then
513 # We have to use a subshell because "bisect_state" can exit.
514 ( bisect_state $state > "$GIT_DIR/BISECT_RUN" )
517 cat "$GIT_DIR/BISECT_RUN"
519 if grep "first bad commit could be any of" "$GIT_DIR/BISECT_RUN" \
521 echo >&2 "bisect run cannot continue any more"
525 if [ $res -ne 0 ]; then
526 echo >&2 "bisect run failed:"
527 echo >&2 "'bisect_state $state' exited with error code $res"
531 if grep "is first bad commit" "$GIT_DIR/BISECT_RUN" > /dev/null; then
532 echo "bisect run success"
552 bisect_state "$cmd" "$@" ;;
556 # Not sure we want "next" at the UI level anymore.
559 bisect_visualize "$@" ;;
563 bisect_replay "$@" ;;
565 cat "$GIT_DIR/BISECT_LOG" ;;