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"
39 s/'\''/'\'\\\\\'\''/g;
47 test -s "$GIT_DIR/BISECT_START" || {
48 echo >&2 'You need to start by "git bisect start"'
51 echo >&2 -n 'Do you want me to do it for you [Y/n]? '
68 head=$(GIT_DIR="$GIT_DIR" git symbolic-ref -q HEAD) ||
69 head=$(GIT_DIR="$GIT_DIR" git rev-parse --verify HEAD) ||
70 die "Bad HEAD - I need a HEAD"
73 # Check if we are bisecting.
76 if test -s "$GIT_DIR/BISECT_START"
78 # Reset to the rev from where we started.
79 start_head=$(cat "$GIT_DIR/BISECT_START")
80 git checkout "$start_head" -- || exit
82 # Get rev from where we start.
85 # This error message should only be triggered by
86 # cogito usage, and cogito users should understand
87 # it relates to cg-seek.
88 [ -s "$GIT_DIR/head-name" ] &&
89 die "won't bisect on seeked tree"
90 start_head="${head#refs/heads/}"
93 die "Bad HEAD - strange symbolic ref"
99 # Get rid of any old bisect state.
101 bisect_clean_state || exit
104 # Check for one bad and then some good revisions.
108 case "$arg" in --) has_double_dash=1; break ;; esac
113 while [ $# -gt 0 ]; do
121 rev=$(git rev-parse -q --verify "$arg^{commit}") || {
122 test $has_double_dash -eq 1 &&
123 die "'$arg' does not appear to be a valid revision"
127 0) state='bad' ; bad_seen=1 ;;
130 eval="$eval bisect_write '$state' '$rev' 'nolog'; "
138 # In case of mistaken revs or checkout error, or signals received,
139 # "bisect_auto_next" below may exit or misbehave.
140 # We have to trap this to be able to clean up using
141 # "bisect_clean_state".
143 trap 'bisect_clean_state' 0
144 trap 'exit 255' 1 2 3 15
147 # Write new start state.
149 echo "$start_head" >"$GIT_DIR/BISECT_START" &&
150 sq "$@" >"$GIT_DIR/BISECT_NAMES" &&
152 echo "git bisect start$orig_args" >>"$GIT_DIR/BISECT_LOG" || exit
154 # Check if we can proceed to the next bisect state.
167 good|skip) tag="$state"-"$rev" ;;
168 *) die "Bad bisect_write argument: $state" ;;
170 git update-ref "refs/bisect/$tag" "$rev" || exit
171 echo "# $state: $(git show-branch $rev)" >>"$GIT_DIR/BISECT_LOG"
172 test -n "$nolog" || echo "git bisect $state $rev" >>"$GIT_DIR/BISECT_LOG"
176 test -f "$GIT_DIR/BISECT_EXPECTED_REV" &&
177 test "$1" = $(cat "$GIT_DIR/BISECT_EXPECTED_REV")
180 mark_expected_rev() {
181 echo "$1" > "$GIT_DIR/BISECT_EXPECTED_REV"
184 check_expected_revs() {
186 if ! is_expected_rev "$_rev"; then
187 rm -f "$GIT_DIR/BISECT_ANCESTORS_OK"
188 rm -f "$GIT_DIR/BISECT_EXPECTED_REV"
200 revs=$(git rev-list "$arg") || die "Bad rev input: $arg" ;;
206 eval bisect_state 'skip' $all
214 die "Please call 'bisect_state' with at least one argument." ;;
216 rev=$(git rev-parse --verify HEAD) ||
217 die "Bad rev input: HEAD"
218 bisect_write "$state" "$rev"
219 check_expected_revs "$rev" ;;
225 sha=$(git rev-parse --verify "$rev^{commit}") ||
226 die "Bad rev input: $rev"
227 eval="$eval bisect_write '$state' '$sha'; "
230 check_expected_revs "$@" ;;
232 die "'git bisect bad' can take only one argument." ;;
239 bisect_next_check() {
240 missing_good= missing_bad=
241 git show-ref -q --verify refs/bisect/bad || missing_bad=t
242 test -n "$(git for-each-ref "refs/bisect/good-*")" || missing_good=t
244 case "$missing_good,$missing_bad,$1" in
246 : have both good and bad - ok
249 # do not have both but not asked to fail - just report.
253 # have bad but not good. we could bisect although
254 # this is less optimum.
255 echo >&2 'Warning: bisecting only with a bad commit.'
258 printf >&2 'Are you sure [Y/n]? '
260 case "$yesno" in [Nn]*) exit 1 ;; esac
262 : bisect without good...
266 test -s "$GIT_DIR/BISECT_START" || {
267 echo >&2 'You need to start by "git bisect start".'
270 echo >&2 'You '$THEN'need to give me at least one good' \
271 'and one bad revisions.'
272 echo >&2 '(You can use "git bisect bad" and' \
273 '"git bisect good" for that.)'
279 bisect_next_check && bisect_next || :
282 exit_if_skipped_commits () {
285 if test -n "$_tried" ; then
286 echo "There are only 'skip'ped commit left to test."
287 echo "The first bad commit could be any of:"
288 echo "$_tried" | tr '[|]' '[\012]'
289 test -n "$_bad" && echo "$_bad"
290 echo "We cannot bisect more!"
298 echo "Bisecting: $_msg"
299 mark_expected_rev "$_rev"
300 git checkout -q "$_rev" -- || exit
301 git show-branch "$_rev"
307 case "$_list" in *$_rev*) return 0 ;; esac
311 handle_bad_merge_base() {
314 if is_expected_rev "$_badmb"; then
316 The merge base $_badmb is bad.
317 This means the bug has been fixed between $_badmb and [$_good].
322 Some good revs are not ancestor of the bad rev.
323 git bisect cannot work properly in this case.
324 Maybe you mistake good and bad revs?
330 handle_skipped_merge_base() {
335 Warning: the merge base between $_bad and [$_good] must be skipped.
336 So we cannot be sure the first bad commit is between $_mb and $_bad.
342 # "check_merge_bases" checks that merge bases are not "bad".
344 # - If one is "good", that's good, we have nothing to do.
345 # - If one is "bad", it means the user assumed something wrong
347 # - If one is "skipped", we can't know but we should warn.
348 # - If we don't know, we should check it out and ask the user to test.
350 # In the last case we will return 1, and otherwise 0.
352 check_merge_bases() {
356 for _mb in $(git merge-base --all $_bad $_good)
358 if is_among "$_mb" "$_good"; then
360 elif test "$_mb" = "$_bad"; then
361 handle_bad_merge_base "$_bad" "$_good"
362 elif is_among "$_mb" "$_skip"; then
363 handle_skipped_merge_base "$_mb" "$_bad" "$_good"
365 bisect_checkout "$_mb" "a merge base must be tested"
373 # "check_good_are_ancestors_of_bad" checks that all "good" revs are
374 # ancestor of the "bad" rev.
376 # If that's not the case, we need to check the merge bases.
377 # If a merge base must be tested by the user we return 1 and
380 check_good_are_ancestors_of_bad() {
381 test -f "$GIT_DIR/BISECT_ANCESTORS_OK" &&
385 _good=$(echo $2 | sed -e 's/\^//g')
388 # Bisecting with no good rev is ok
389 test -z "$_good" && return
391 _side=$(git rev-list $_good ^$_bad)
392 if test -n "$_side"; then
393 # Return if a checkout was done
394 check_merge_bases "$_bad" "$_good" "$_skip" || return
397 : > "$GIT_DIR/BISECT_ANCESTORS_OK"
403 case "$#" in 0) ;; *) usage ;; esac
405 bisect_next_check good
407 # Get bad, good and skipped revs
408 bad=$(git rev-parse --verify refs/bisect/bad) &&
409 good=$(git for-each-ref --format='^%(objectname)' \
410 "refs/bisect/good-*" | tr '\012' ' ') &&
411 skip=$(git for-each-ref --format='%(objectname)' \
412 "refs/bisect/skip-*" | tr '\012' ' ') || exit
414 # Maybe some merge bases must be tested first
415 check_good_are_ancestors_of_bad "$bad" "$good" "$skip"
416 # Return now if a checkout has already been done
417 test "$?" -eq "1" && return
419 # Get bisection information
420 eval=$(eval "git bisect--helper --next-vars") &&
423 if [ -z "$bisect_rev" ]; then
424 # We should exit here only if the "bad"
425 # commit is also a "skip" commit (see above).
426 exit_if_skipped_commits "$bisect_tried"
427 echo "$bad was both good and bad"
430 if [ "$bisect_rev" = "$bad" ]; then
431 exit_if_skipped_commits "$bisect_tried" "$bad"
432 echo "$bisect_rev is first bad commit"
433 git diff-tree --pretty $bisect_rev
437 bisect_checkout "$bisect_rev" "$bisect_nr revisions left to test after this (roughly $bisect_steps steps)"
441 bisect_next_check fail
445 case "${DISPLAY+set}${SESSIONNAME+set}${MSYSTEM+set}${SECURITYSESSIONID+set}" in
452 -*) set git log "$@" ;;
457 not=$(git for-each-ref --format='%(refname)' "refs/bisect/good-*")
458 eval '"$@"' refs/bisect/bad --not $not -- $(cat "$GIT_DIR/BISECT_NAMES")
462 test -s "$GIT_DIR/BISECT_START" || {
463 echo "We are not bisecting."
467 0) branch=$(cat "$GIT_DIR/BISECT_START") ;;
468 1) git show-ref --verify --quiet -- "refs/heads/$1" ||
469 die "$1 does not seem to be a valid branch"
474 git checkout "$branch" -- && bisect_clean_state
477 bisect_clean_state() {
478 # There may be some refs packed during bisection.
479 git for-each-ref --format='%(refname) %(objectname)' refs/bisect/\* |
482 git update-ref -d $ref $hash || exit
484 rm -f "$GIT_DIR/BISECT_EXPECTED_REV" &&
485 rm -f "$GIT_DIR/BISECT_ANCESTORS_OK" &&
486 rm -f "$GIT_DIR/BISECT_LOG" &&
487 rm -f "$GIT_DIR/BISECT_NAMES" &&
488 rm -f "$GIT_DIR/BISECT_RUN" &&
489 # Cleanup head-name if it got left by an old version of git-bisect
490 rm -f "$GIT_DIR/head-name" &&
492 rm -f "$GIT_DIR/BISECT_START"
496 test -r "$1" || die "cannot read $1 for replaying"
498 while read git bisect command rev
500 test "$git $bisect" = "git bisect" -o "$git" = "git-bisect" || continue
501 if test "$git" = "git-bisect"; then
507 cmd="bisect_start $rev"
510 bisect_write "$command" "$rev" ;;
512 die "?? what are you talking about?" ;;
519 bisect_next_check fail
527 # Check for really bad run error.
528 if [ $res -lt 0 -o $res -ge 128 ]; then
529 echo >&2 "bisect run failed:"
530 echo >&2 "exit code $res from '$@' is < 0 or >= 128"
534 # Find current state depending on run success or failure.
535 # A special exit code of 125 means cannot test.
536 if [ $res -eq 125 ]; then
538 elif [ $res -gt 0 ]; then
544 # We have to use a subshell because "bisect_state" can exit.
545 ( bisect_state $state > "$GIT_DIR/BISECT_RUN" )
548 cat "$GIT_DIR/BISECT_RUN"
550 if grep "first bad commit could be any of" "$GIT_DIR/BISECT_RUN" \
552 echo >&2 "bisect run cannot continue any more"
556 if [ $res -ne 0 ]; then
557 echo >&2 "bisect run failed:"
558 echo >&2 "'bisect_state $state' exited with error code $res"
562 if grep "is first bad commit" "$GIT_DIR/BISECT_RUN" > /dev/null; then
563 echo "bisect run success"
583 bisect_state "$cmd" "$@" ;;
587 # Not sure we want "next" at the UI level anymore.
590 bisect_visualize "$@" ;;
594 bisect_replay "$@" ;;
596 cat "$GIT_DIR/BISECT_LOG" ;;