Edit: /usr/libexec/git-core/git-bisect (10021B)
#!/bin/sh
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 [
[...]] [--] [...]
reset bisect state and start bisection.
git bisect bad []
mark a known-bad revision.
git bisect good [...]
mark ... known-good revisions.
git bisect skip [(|)...]
mark ... untestable revisions.
git bisect next
find next bisection to test and check it out.
git bisect reset []
finish bisection search and go back to commit.
git bisect visualize
show bisect status in gitk.
git bisect replay
replay bisection log.
git bisect log
show bisect log.
git bisect run ...
use ... 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"
bisect_autostart() {
test -s "$GIT_DIR/BISECT_START" || {
echo >&2 'You need to start by "git bisect start"'
if test -t 0
then
echo >&2 -n 'Do you want me to do it for you [Y/n]? '
read yesno
case "$yesno" in
[Nn]*)
exit ;;
esac
bisect_start
else
exit 1
fi
}
}
bisect_start() {
#
# 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 if we are bisecting.
#
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.
#
has_double_dash=0
for arg; do
case "$arg" in --) has_double_dash=1; break ;; esac
done
orig_args=$(git rev-parse --sq-quote "$@")
bad_seen=0
eval=''
while [ $# -gt 0 ]; do
arg="$1"
case "$arg" in
--)
shift
break
;;
*)
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
}
case $bad_seen in
0) state='bad' ; bad_seen=1 ;;
*) state='good' ;;
esac
eval="$eval bisect_write '$state' '$rev' 'nolog'; "
shift
;;
esac
done
#
# 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" &&
git rev-parse --sq-quote "$@" >"$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() {
state="$1"
rev="$2"
nolog="$3"
case "$state" in
bad) tag="$state" ;;
good|skip) tag="$state"-"$rev" ;;
*) die "Bad bisect_write argument: $state" ;;
esac
git update-ref "refs/bisect/$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"
}
is_expected_rev() {
test -f "$GIT_DIR/BISECT_EXPECTED_REV" &&
test "$1" = $(cat "$GIT_DIR/BISECT_EXPECTED_REV")
}
check_expected_revs() {
for _rev in "$@"; do
if ! is_expected_rev "$_rev"; then
rm -f "$GIT_DIR/BISECT_ANCESTORS_OK"
rm -f "$GIT_DIR/BISECT_EXPECTED_REV"
return
fi
done
}
bisect_skip() {
all=''
for arg in "$@"
do
case "$arg" in
*..*)
revs=$(git rev-list "$arg") || die "Bad rev input: $arg" ;;
*)
revs=$(git rev-parse --sq-quote "$arg") ;;
esac
all="$all $revs"
done
eval bisect_state 'skip' $all
}
bisect_state() {
bisect_autostart
state=$1
case "$#,$state" in
0,*)
die "Please call 'bisect_state' with at least one argument." ;;
1,bad|1,good|1,skip)
rev=$(git rev-parse --verify HEAD) ||
die "Bad rev input: HEAD"
bisect_write "$state" "$rev"
check_expected_revs "$rev" ;;
2,bad|*,good|*,skip)
shift
eval=''
for rev in "$@"
do
sha=$(git rev-parse --verify "$rev^{commit}") ||
die "Bad rev input: $rev"
eval="$eval bisect_write '$state' '$sha'; "
done
eval "$eval"
check_expected_revs "$@" ;;
*,bad)
die "'git bisect bad' can take only one argument." ;;
*)
usage ;;
esac
bisect_auto_next
}
bisect_next_check() {
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,$1" in
,,*)
: have both good and bad - ok
;;
*,)
# do not have both but not asked to fail - just report.
false
;;
t,,good)
# have bad but not good. we could bisect although
# this is less optimum.
echo >&2 'Warning: bisecting only with a bad commit.'
if test -t 0
then
printf >&2 'Are you sure [Y/n]? '
read yesno
case "$yesno" in [Nn]*) exit 1 ;; esac
fi
: bisect without good...
;;
*)
THEN=''
test -s "$GIT_DIR/BISECT_START" || {
echo >&2 'You need to start by "git bisect start".'
THEN='then '
}
echo >&2 'You '$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
}
bisect_auto_next() {
bisect_next_check && bisect_next || :
}
bisect_next() {
case "$#" in 0) ;; *) usage ;; esac
bisect_autostart
bisect_next_check good
# Perform all bisection computation, display and checkout
git bisect--helper --next-all
res=$?
# Check if we should exit because bisection is finished
test $res -eq 10 && exit 0
# Check for an error in the bisection process
test $res -ne 0 && exit $res
return 0
}
bisect_visualize() {
bisect_next_check fail
if test $# = 0
then
case "${DISPLAY+set}${SESSIONNAME+set}${MSYSTEM+set}${SECURITYSESSIONID+set}" in
'') set git log ;;
set*) set gitk ;;
esac
else
case "$1" in
git*|tig) ;;
-*) set git log "$@" ;;
*) set git "$@" ;;
esac
fi
eval '"$@"' --bisect -- $(cat "$GIT_DIR/BISECT_NAMES")
}
bisect_reset() {
test -s "$GIT_DIR/BISECT_START" || {
echo "We are not bisecting."
return
}
case "$#" in
0) branch=$(cat "$GIT_DIR/BISECT_START") ;;
1) git rev-parse --quiet --verify "$1^{commit}" > /dev/null ||
die "'$1' is not a valid commit"
branch="$1" ;;
*)
usage ;;
esac
git checkout "$branch" -- && bisect_clean_state
}
bisect_clean_state() {
# There may be some refs packed during bisection.
git for-each-ref --format='%(refname) %(objectname)' refs/bisect/\* |
while read ref hash
do
git update-ref -d $ref $hash || exit
done
rm -f "$GIT_DIR/BISECT_EXPECTED_REV" &&
rm -f "$GIT_DIR/BISECT_ANCESTORS_OK" &&
rm -f "$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 $1 for replaying"
bisect_reset
while read git bisect command rev
do
test "$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 $rev"
eval "$cmd" ;;
good|bad|skip)
bisect_write "$command" "$rev" ;;
*)
die "?? what are you talking about?" ;;
esac
done <"$1"
bisect_auto_next
}
bisect_run () {
bisect_next_check fail
while true
do
echo "running $@"
"$@"
res=$?
# Check for really bad run error.
if [ $res -lt 0 -o $res -ge 128 ]; then
echo >&2 "bisect run failed:"
echo >&2 "exit code $res from '$@' is < 0 or >= 128"
exit $res
fi
# Find current state depending on run success or failure.
# A special exit code of 125 means cannot test.
if [ $res -eq 125 ]; then
state='skip'
elif [ $res -gt 0 ]; then
state='bad'
else
state='good'
fi
# We have to use a subshell because "bisect_state" can exit.
( bisect_state $state > "$GIT_DIR/BISECT_RUN" )
res=$?
cat "$GIT_DIR/BISECT_RUN"
if sane_grep "first bad commit could be any of" "$GIT_DIR/BISECT_RUN" \
> /dev/null; then
echo >&2 "bisect run cannot continue any more"
exit $res
fi
if [ $res -ne 0 ]; then
echo >&2 "bisect run failed:"
echo >&2 "'bisect_state $state' exited with error code $res"
exit $res
fi
if sane_grep "is the first bad commit" "$GIT_DIR/BISECT_RUN" > /dev/null; then
echo "bisect run success"
exit 0;
fi
done
}
case "$#" in
0)
usage ;;
*)
cmd="$1"
shift
case "$cmd" in
help)
git bisect -h ;;
start)
bisect_start "$@" ;;
bad|good)
bisect_state "$cmd" "$@" ;;
skip)
bisect_skip "$@" ;;
next)
# Not sure we want "next" at the UI level anymore.
bisect_next "$@" ;;
visualize|view)
bisect_visualize "$@" ;;
reset)
bisect_reset "$@" ;;
replay)
bisect_replay "$@" ;;
log)
cat "$GIT_DIR/BISECT_LOG" ;;
run)
bisect_run "$@" ;;
*)
usage ;;
esac
esac