diff options
Diffstat (limited to 'git-bisect.sh')
| -rwxr-xr-x | git-bisect.sh | 127 |
1 files changed, 102 insertions, 25 deletions
diff --git a/git-bisect.sh b/git-bisect.sh index 97ac600873..b314d47704 100755 --- a/git-bisect.sh +++ b/git-bisect.sh @@ -243,33 +243,18 @@ bisect_auto_next() { bisect_next_check && bisect_next || : } -eval_rev_list() { - _eval="$1" - - eval $_eval - res=$? - - if [ $res -ne 0 ]; then - echo >&2 "'git rev-list --bisect-vars' failed:" - echo >&2 "maybe you mistake good and bad revs?" - exit $res - fi - - return $res -} - filter_skipped() { _eval="$1" _skip="$2" if [ -z "$_skip" ]; then - eval_rev_list "$_eval" + eval "$_eval" return fi # Let's parse the output of: # "git rev-list --bisect-vars --bisect-all ..." - eval_rev_list "$_eval" | while read hash line + eval "$_eval" | while read hash line do case "$VARS,$FOUND,$TRIED,$hash" in # We display some vars. @@ -332,20 +317,113 @@ exit_if_skipped_commits () { fi } +bisect_checkout() { + _rev="$1" + _msg="$2" + echo "Bisecting: $_msg" + git checkout -q "$_rev" || exit + git show-branch "$_rev" +} + +is_among() { + _rev="$1" + _list="$2" + case "$_list" in *$_rev*) return 0 ;; esac + return 1 +} + +is_testing_merge_base() { + grep "^testing $1$" "$GIT_DIR/BISECT_MERGE_BASES" >/dev/null 2>&1 +} + +mark_testing_merge_base() { + echo "testing $1" >> "$GIT_DIR/BISECT_MERGE_BASES" +} + +handle_bad_merge_base() { + _badmb="$1" + _good="$2" + if is_testing_merge_base "$_badmb"; then + cat >&2 <<EOF +The merge base $_badmb is bad. +This means the bug has been fixed between $_badmb and [$_good]. +EOF + exit 3 + else + cat >&2 <<EOF +Some good revs are not ancestor of the bad rev. +git bisect cannot work properly in this case. +Maybe you mistake good and bad revs? +EOF + exit 1 + fi +} + +handle_skipped_merge_base() { + _mb="$1" + _bad="$2" + _good="$3" + cat >&2 <<EOF +Warning: the merge base between $_bad and [$_good] must be skipped. +So we cannot be sure the first bad commit is between $_mb and $_bad. +We continue anyway. +EOF +} + +check_merge_bases() { + _bad="$1" + _good="$2" + _skip="$3" + for _mb in $(git merge-base --all $_bad $_good) + do + if is_among "$_mb" "$_good"; then + continue + elif test "$_mb" = "$_bad"; then + handle_bad_merge_base "$_bad" "$_good" + elif is_among "$_mb" "$_skip"; then + handle_skipped_merge_base "$_mb" "$_bad" "$_good" + else + mark_testing_merge_base "$_mb" + bisect_checkout "$_mb" "a merge base must be tested" + checkout_done=1 + return + fi + done +} + +check_good_are_ancestors_of_bad() { + _bad="$1" + _good=$(echo $2 | sed -e 's/\^//g') + _skip="$3" + + # Bisecting with no good rev is ok + test -z "$_good" && return + + _side=$(git rev-list $_good ^$_bad) + if test -n "$_side"; then + check_merge_bases "$_bad" "$_good" "$_skip" + fi +} + bisect_next() { case "$#" in 0) ;; *) usage ;; esac bisect_autostart bisect_next_check good + # Get bad, good and skipped revs + bad=$(git rev-parse --verify refs/bisect/bad) && + good=$(git for-each-ref --format='^%(objectname)' \ + "refs/bisect/good-*" | tr '\012' ' ') && skip=$(git for-each-ref --format='%(objectname)' \ - "refs/bisect/skip-*" | tr '\012' ' ') || exit + "refs/bisect/skip-*" | tr '\012' ' ') && + # Maybe some merge bases must be tested first + check_good_are_ancestors_of_bad "$bad" "$good" "$skip" || exit + test "$checkout_done" -eq "1" && checkout_done='' && return + + # Get bisection information BISECT_OPT='' test -n "$skip" && BISECT_OPT='--bisect-all' - - bad=$(git rev-parse --verify refs/bisect/bad) && - good=$(git for-each-ref --format='^%(objectname)' \ - "refs/bisect/good-*" | tr '\012' ' ') && eval="git rev-list --bisect-vars $BISECT_OPT $good $bad --" && eval="$eval $(cat "$GIT_DIR/BISECT_NAMES")" && eval=$(filter_skipped "$eval" "$skip") && @@ -366,9 +444,7 @@ bisect_next() { # commit is also a "skip" commit (see above). exit_if_skipped_commits "$bisect_rev" - echo "Bisecting: $bisect_nr revisions left to test after this" - git checkout -q "$bisect_rev" || exit - git show-branch "$bisect_rev" + bisect_checkout "$bisect_rev" "$bisect_nr revisions left to test after this" } bisect_visualize() { @@ -415,6 +491,7 @@ bisect_clean_state() { do git update-ref -d $ref $hash || exit done + rm -f "$GIT_DIR/BISECT_MERGE_BASES" && rm -f "$GIT_DIR/BISECT_LOG" && rm -f "$GIT_DIR/BISECT_NAMES" && rm -f "$GIT_DIR/BISECT_RUN" && |