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authorJunio C Hamano <junkio@cox.net>2007-04-06 06:27:44 (GMT)
committerJunio C Hamano <junkio@cox.net>2007-04-07 00:55:57 (GMT)
commit0a5280a9f444c33b0e4ebf2f073df5899c112cf8 (patch)
treecd6e6a6ceda6d4019ef1a0610646e05a95b32c73 /git-bisect.sh
parent4f50671699090089b7967880f9b0291391c8de1a (diff)
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git-bisect: allow bisecting with only one bad commit.
This allows you to say: git bisect start git bisect bad $bad git bisect next to start bisection without knowing a good commit. This would have you try a commit that is half-way since the beginning of the history, which is rather wasteful if you already know a good commit, but if you don't (or your history is short enough that you do not care), there is no reason not to allow this. Signed-off-by: Junio C Hamano <junkio@cox.net>
Diffstat (limited to 'git-bisect.sh')
-rwxr-xr-xgit-bisect.sh87
1 files changed, 53 insertions, 34 deletions
diff --git a/git-bisect.sh b/git-bisect.sh
index c936533..85c374e 100755
--- a/git-bisect.sh
+++ b/git-bisect.sh
@@ -168,26 +168,40 @@ bisect_write_good() {
}
bisect_next_check() {
- next_ok=no
- git show-ref -q --verify refs/bisect/bad &&
- test -n "$(git for-each-ref "refs/bisect/good-*")" &&
- next_ok=yes
-
- case "$next_ok,$1" in
- no,) false ;;
- no,fail)
- THEN=''
- test -d "$GIT_DIR/refs/bisect" || {
- echo >&2 'You need to start by "git bisect start".'
- THEN='then '
- }
- echo >&2 'You '$THEN'need to give me at least one good' \
- 'and one bad revisions.'
- echo >&2 '(You can use "git bisect bad" and' \
- '"git bisect good" for that.)'
- exit 1 ;;
+ missing_good= missing_bad=
+ git show-ref -q --verify refs/bisect/bad || missing_bad=t
+ test -n "$(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
}
@@ -198,27 +212,32 @@ bisect_auto_next() {
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() {