#!/bin/sh
-USAGE='[start|bad|good|skip|next|reset|visualize|replay|log|run]'
-LONG_USAGE='git bisect start [<bad> [<good>...]] [--] [<pathspec>...]
+USAGE='[help|start|bad|good|skip|next|reset|visualize|replay|log|run]'
+LONG_USAGE='git bisect help
+ print this long help message.
+git bisect start [<bad> [<good>...]] [--] [<pathspec>...]
reset bisect state and start bisection.
git bisect bad [<rev>]
mark <rev> a known-bad revision.
git bisect log
show bisect log.
git bisect run <cmd>...
- use <cmd>... to automatically bisect.'
+ use <cmd>... to automatically bisect.
+
+Please use "git help bisect" to get the full man page.'
OPTIONS_SPEC=
. git-sh-setup
require_work_tree
+_x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
+_x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40"
+
sq() {
@@PERL@@ -e '
for (@ARGV) {
}
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 HEAD) ||
- die "Bad HEAD - I need a symbolic ref"
- case "$head" in
- refs/heads/bisect)
- if [ -s "$GIT_DIR/head-name" ]; then
- branch=`cat "$GIT_DIR/head-name"`
- else
- branch=master
- fi
- git checkout $branch || exit
- ;;
- refs/heads/*)
- [ -s "$GIT_DIR/head-name" ] && die "won't bisect on seeked tree"
- echo "${head#refs/heads/}" >"$GIT_DIR/head-name"
- ;;
- *)
- die "Bad HEAD - strange symbolic ref"
- ;;
- esac
+ 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"
#
- # Get rid of any old bisect state
+ # Check if we are bisecting.
#
- bisect_clean_state
+ start_head=''
+ 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.
+ #
+ bisect_clean_state || exit
#
# Check for one bad and then some good revisions.
done
orig_args=$(sq "$@")
bad_seen=0
+ eval=''
while [ $# -gt 0 ]; do
arg="$1"
case "$arg" in
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
0) state='bad' ; bad_seen=1 ;;
*) state='good' ;;
esac
- bisect_write "$state" "$rev" 'nolog'
+ eval="$eval bisect_write '$state' '$rev' 'nolog'; "
shift
;;
esac
done
- sq "$@" >"$GIT_DIR/BISECT_NAMES"
- echo "git-bisect start$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"
- echo "# $state: "$(git show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
- test -z "$nolog" && echo "git-bisect $state $rev" >>"$GIT_DIR/BISECT_LOG"
+ git update-ref "refs/bisect/$tag" "$rev" || exit
+ echo "# $state: $(git show-branch $rev)" >>"$GIT_DIR/BISECT_LOG"
+ test -n "$nolog" || echo "git bisect $state $rev" >>"$GIT_DIR/BISECT_LOG"
}
bisect_state() {
rev=$(git rev-parse --verify HEAD) ||
die "Bad rev input: HEAD"
bisect_write "$state" "$rev" ;;
- 2,bad)
- rev=$(git rev-parse --verify "$2^{commit}") ||
- die "Bad rev input: $2"
- bisect_write "$state" "$rev" ;;
- *,good|*,skip)
+ 2,bad|*,good|*,skip)
shift
- revs=$(git rev-parse --revs-only --no-flags "$@") &&
- test '' != "$revs" || die "Bad rev input: $@"
- for rev in $revs
+ eval=''
+ for rev in "$@"
do
- rev=$(git rev-parse --verify "$rev^{commit}") ||
- die "Bad rev commit: $rev^{commit}"
- bisect_write "$state" "$rev"
- done ;;
+ sha=$(git rev-parse --verify "$rev^{commit}") ||
+ die "Bad rev input: $rev"
+ eval="$eval bisect_write '$state' '$sha'; "
+ done
+ eval "$eval" ;;
+ *,bad)
+ die "'git bisect bad' can take only one argument." ;;
*)
usage ;;
esac
if test -t 0
then
printf >&2 'Are you sure [Y/n]? '
- case "$(read yesno)" in [Nn]*) exit 1 ;; esac
+ read yesno
+ case "$yesno" in [Nn]*) exit 1 ;; esac
fi
: bisect without good...
;;
*)
THEN=''
- test -f "$GIT_DIR/BISECT_NAMES" || {
+ test -s "$GIT_DIR/BISECT_START" || {
echo >&2 'You need to start by "git bisect start".'
THEN='then '
}
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 $_eval
+ eval_rev_list "$_eval" | {
+ while read line
+ do
+ echo "$line &&"
+ done
+ echo ':'
+ }
return
fi
# Let's parse the output of:
# "git rev-list --bisect-vars --bisect-all ..."
- eval $_eval | while read hash line
- do
- case "$VARS,$FOUND,$TRIED,$hash" in
- # We display some vars.
- 1,*,*,*) echo "$hash $line" ;;
-
- # Split line.
- ,*,*,---*) ;;
-
- # We had nothing to search.
+ eval_rev_list "$_eval" | {
+ VARS= FOUND= TRIED=
+ while read hash line
+ do
+ case "$VARS,$FOUND,$TRIED,$hash" in
+ 1,*,*,*)
+ # "bisect_foo=bar" read from rev-list output.
+ echo "$hash &&"
+ ;;
+ ,*,*,---*)
+ # Separator
+ ;;
,,,bisect_rev*)
- echo "bisect_rev="
+ # We had nothing to search.
+ echo "bisect_rev= &&"
VARS=1
;;
-
- # We did not find a good bisect rev.
- # This should happen only if the "bad"
- # commit is also a "skip" commit.
,,*,bisect_rev*)
- echo "bisect_rev=$TRIED"
+ # We did not find a good bisect rev.
+ # This should happen only if the "bad"
+ # commit is also a "skip" commit.
+ echo "bisect_rev='$TRIED' &&"
VARS=1
;;
-
- # We are searching.
,,*,*)
+ # We are searching.
TRIED="${TRIED:+$TRIED|}$hash"
case "$_skip" in
*$hash*) ;;
*)
- echo "bisect_rev=$hash"
- echo "bisect_tried=\"$TRIED\""
+ echo "bisect_rev=$hash &&"
+ echo "bisect_tried='$TRIED' &&"
FOUND=1
;;
esac
;;
-
- # We have already found a rev to be tested.
- ,1,*,bisect_rev*) VARS=1 ;;
- ,1,*,*) ;;
-
- # ???
- *) die "filter_skipped error " \
- "VARS: '$VARS' " \
- "FOUND: '$FOUND' " \
- "TRIED: '$TRIED' " \
- "hash: '$hash' " \
- "line: '$line'"
- ;;
- esac
- done
+ ,1,*,bisect_rev*)
+ # We have already found a rev to be tested.
+ VARS=1
+ ;;
+ ,1,*,*)
+ ;;
+ *)
+ # Unexpected input
+ echo "die 'filter_skipped error'"
+ die "filter_skipped error " \
+ "VARS: '$VARS' " \
+ "FOUND: '$FOUND' " \
+ "TRIED: '$TRIED' " \
+ "hash: '$hash' " \
+ "line: '$line'"
+ ;;
+ esac
+ done
+ echo ':'
+ }
}
exit_if_skipped_commits () {
bisect_next_check good
skip=$(git for-each-ref --format='%(objectname)' \
- "refs/bisect/skip-*" | tr '[\012]' ' ') || exit
+ "refs/bisect/skip-*" | tr '\012' ' ') || exit
BISECT_OPT=''
test -n "$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]' ' ') &&
+ "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" "$skip") &&
exit_if_skipped_commits "$bisect_rev"
echo "Bisecting: $bisect_nr revisions left to test after this"
- git branch -f new-bisect "$bisect_rev"
- git checkout -q new-bisect || exit
- git branch -M new-bisect bisect
+ git checkout -q "$bisect_rev" || exit
git show-branch "$bisect_rev"
}
if test $# = 0
then
- case "${DISPLAY+set}" in
+ case "${DISPLAY+set}${MSYSTEM+set}${SECURITYSESSIONID+set}" in
'') set git log ;;
- set) set gitk ;;
+ set*) set gitk ;;
esac
else
case "$1" in
}
bisect_reset() {
- test -f "$GIT_DIR/BISECT_NAMES" || {
+ test -s "$GIT_DIR/BISECT_START" || {
echo "We are not bisecting."
return
}
case "$#" in
- 0) if [ -s "$GIT_DIR/head-name" ]; then
- branch=`cat "$GIT_DIR/head-name"`
- 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
- rm -f "$GIT_DIR/head-name"
- bisect_clean_state
- fi
+ git checkout "$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 () {
test -r "$1" || die "cannot read $1 for replaying"
bisect_reset
- while read bisect command rev
+ while read git bisect command rev
do
- test "$bisect" = "git-bisect" || continue
+ test "$git $bisect" = "git bisect" -o "$git" = "git-bisect" || continue
+ if test "$git" = "git-bisect"; then
+ rev="$command"
+ command="$bisect"
+ fi
case "$command" in
start)
cmd="bisect_start $rev"
cmd="$1"
shift
case "$cmd" in
+ help)
+ git bisect -h ;;
start)
bisect_start "$@" ;;
bad|good|skip)