}
bisect_autostart() {
- test -f "$GIT_DIR/BISECT_NAMES" || {
+ test -s "$GIT_DIR/BISECT_START" || {
echo >&2 'You need to start by "git bisect start"'
if test -t 0
then
bisect_start() {
#
- # Verify HEAD. If we were bisecting before this, reset to the
- # top-of-line master first!
+ # Verify HEAD.
#
head=$(GIT_DIR="$GIT_DIR" git symbolic-ref -q HEAD) ||
head=$(GIT_DIR="$GIT_DIR" git rev-parse --verify HEAD) ||
die "Bad HEAD - I need a HEAD"
+
#
- # Check that we either already have BISECT_START, or that the
- # branches bisect, new-bisect don't exist, to not override them.
+ # Check if we are bisecting.
#
- test -s "$GIT_DIR/BISECT_START" ||
- if git show-ref --verify -q refs/heads/bisect ||
- git show-ref --verify -q refs/heads/new-bisect; then
- die 'The branches "bisect" and "new-bisect" must not exist.'
- fi
start_head=''
- case "$head" in
- refs/heads/bisect)
- branch=`cat "$GIT_DIR/BISECT_START"`
- git checkout $branch || exit
- ;;
- refs/heads/*|$_x40)
- # This error message should only be triggered by cogito usage,
- # and cogito users should understand it relates to cg-seek.
- [ -s "$GIT_DIR/head-name" ] && die "won't bisect on seeked tree"
- start_head="${head#refs/heads/}"
- ;;
- *)
- die "Bad HEAD - strange symbolic ref"
- ;;
- esac
+ if test -s "$GIT_DIR/BISECT_START"
+ then
+ # Reset to the rev from where we started.
+ start_head=$(cat "$GIT_DIR/BISECT_START")
+ git checkout "$start_head" || exit
+ else
+ # Get rev from where we start.
+ case "$head" in
+ refs/heads/*|$_x40)
+ # This error message should only be triggered by
+ # cogito usage, and cogito users should understand
+ # it relates to cg-seek.
+ [ -s "$GIT_DIR/head-name" ] &&
+ die "won't bisect on seeked tree"
+ start_head="${head#refs/heads/}"
+ ;;
+ *)
+ die "Bad HEAD - strange symbolic ref"
+ ;;
+ esac
+ fi
#
- # Get rid of any old bisect state
+ # Get rid of any old bisect state.
#
- bisect_clean_state
+ bisect_clean_state || exit
#
# Check for one bad and then some good revisions.
break
;;
*)
- rev=$(git rev-parse --verify "$arg^{commit}" 2>/dev/null) || {
+ rev=$(git rev-parse -q --verify "$arg^{commit}") || {
test $has_double_dash -eq 1 &&
die "'$arg' does not appear to be a valid revision"
break
esac
done
- sq "$@" >"$GIT_DIR/BISECT_NAMES"
- test -n "$start_head" && echo "$start_head" >"$GIT_DIR/BISECT_START"
- eval "$eval"
- echo "git-bisect start$orig_args" >>"$GIT_DIR/BISECT_LOG"
+ #
+ # Change state.
+ # In case of mistaken revs or checkout error, or signals received,
+ # "bisect_auto_next" below may exit or misbehave.
+ # We have to trap this to be able to clean up using
+ # "bisect_clean_state".
+ #
+ trap 'bisect_clean_state' 0
+ trap 'exit 255' 1 2 3 15
+
+ #
+ # Write new start state.
+ #
+ echo "$start_head" >"$GIT_DIR/BISECT_START" &&
+ sq "$@" >"$GIT_DIR/BISECT_NAMES" &&
+ eval "$eval" &&
+ echo "git-bisect start$orig_args" >>"$GIT_DIR/BISECT_LOG" || exit
+ #
+ # Check if we can proceed to the next bisect state.
+ #
bisect_auto_next
+
+ trap '-' 0
}
bisect_write() {
good|skip) tag="$state"-"$rev" ;;
*) die "Bad bisect_write argument: $state" ;;
esac
- git update-ref "refs/bisect/$tag" "$rev"
+ git update-ref "refs/bisect/$tag" "$rev" || exit
echo "# $state: $(git show-branch $rev)" >>"$GIT_DIR/BISECT_LOG"
- test -z "$nolog" && echo "git-bisect $state $rev" >>"$GIT_DIR/BISECT_LOG"
+ test -n "$nolog" || echo "git-bisect $state $rev" >>"$GIT_DIR/BISECT_LOG"
}
bisect_state() {
;;
*)
THEN=''
- test -f "$GIT_DIR/BISECT_NAMES" || {
+ test -s "$GIT_DIR/BISECT_START" || {
echo >&2 'You need to start by "git bisect start".'
THEN='then '
}
exit_if_skipped_commits "$bisect_rev"
echo "Bisecting: $bisect_nr revisions left to test after this"
- git branch -D new-bisect 2> /dev/null
- git checkout -q -b new-bisect "$bisect_rev" || exit
- git branch -M new-bisect bisect
+ git checkout -q "$bisect_rev" || exit
git show-branch "$bisect_rev"
}
}
bisect_reset() {
- test -f "$GIT_DIR/BISECT_NAMES" || {
+ test -s "$GIT_DIR/BISECT_START" || {
echo "We are not bisecting."
return
}
case "$#" in
- 0) if [ -s "$GIT_DIR/BISECT_START" ]; then
- branch=`cat "$GIT_DIR/BISECT_START"`
- else
- branch=master
- fi ;;
+ 0) branch=$(cat "$GIT_DIR/BISECT_START") ;;
1) git show-ref --verify --quiet -- "refs/heads/$1" ||
die "$1 does not seem to be a valid branch"
branch="$1" ;;
*)
usage ;;
esac
- if git checkout "$branch"; then
- # Cleanup head-name if it got left by an old version of git-bisect
- rm -f "$GIT_DIR/head-name"
- rm -f "$GIT_DIR/BISECT_START"
- bisect_clean_state
- fi
+ git checkout "$branch" && bisect_clean_state
}
bisect_clean_state() {
# There may be some refs packed during bisection.
- git for-each-ref --format='%(refname) %(objectname)' refs/bisect/\* refs/heads/bisect |
+ git for-each-ref --format='%(refname) %(objectname)' refs/bisect/\* |
while read ref hash
do
- git update-ref -d $ref $hash
+ git update-ref -d $ref $hash || exit
done
- rm -f "$GIT_DIR/BISECT_LOG"
- rm -f "$GIT_DIR/BISECT_NAMES"
- rm -f "$GIT_DIR/BISECT_RUN"
+ rm -f "$GIT_DIR/BISECT_LOG" &&
+ rm -f "$GIT_DIR/BISECT_NAMES" &&
+ rm -f "$GIT_DIR/BISECT_RUN" &&
+ # Cleanup head-name if it got left by an old version of git-bisect
+ rm -f "$GIT_DIR/head-name" &&
+
+ rm -f "$GIT_DIR/BISECT_START"
}
bisect_replay () {