git/git-bisect.sh

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[PATCH] Making it easier to find which change introduced a bug This adds a new "git bisect" command. - "git bisect start" start bisection search. - "git bisect bad <rev>" mark some version known-bad (if no arguments, then current HEAD) - "git bisect good <revs>..." mark some versions known-good (if no arguments, then current HEAD) - "git bisect reset <branch>" done with bisection search and go back to your work (if no arguments, then "master"). The way you use it is: git bisect start git bisect bad # Current version is bad git bisect good v2.6.13-rc2 # v2.6.13-rc2 was the last version # tested that was good When you give at least one bad and one good versions, it will bisect the revision tree and say something like: Bisecting: 675 revisions left to test after this and check out the state in the middle. Now, compile that kernel, and boot it. Now, let's say that this booted kernel works fine, then just do git bisect good # this one is good which will now say Bisecting: 337 revisions left to test after this and you continue along, compiling that one, testing it, and depending on whether it is good or bad, you say "git bisect good" or "git bisect bad", and ask for the next bisection. Until you have no more left, and you'll have been left with the first bad kernel rev in "refs/bisect/bad". Oh, and then after you want to reset to the original head, do a git bisect reset to get back to the master branch, instead of being in one of the bisection branches ("git bisect start" will do that for you too, actually: it will reset the bisection state, and before it does that it checks that you're not using some old bisection branch). Not really any harder than doing series of "quilt push" and "quilt pop", now is it? [jc: This patch is a rework based on what Linus posted to the list. The changes are: - The original introduced four separate commands, which was three too many, so I merged them into one with subcommands. - Since the next thing you would want to do after telling it "bad" and "good" is always to bisect, this version does it automatically for you. - I think the termination condition was wrong. The original version checked if the set of revisions reachable from next bisection but not rechable from any of the known good ones is empty, but if the current bisection was a bad one, this would not terminate, so I changed it to terminate it when the set becomes a singleton or empty. - Removed the use of shell array variable. ] Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-07-30 21:08:20 +04:00
#!/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 [--no-checkout] [<bad> [<good>...]] [--] [<pathspec>...]
reset bisect state and start bisection.
git bisect bad [<rev>]
mark <rev> a known-bad revision.
git bisect good [<rev>...]
mark <rev>... known-good revisions.
git bisect skip [(<rev>|<range>)...]
mark <rev>... untestable revisions.
git bisect next
find next bisection to test and check it out.
git bisect reset [<commit>]
finish bisection search and go back to commit.
git bisect visualize
show bisect status in gitk.
git bisect replay <logfile>
replay bisection log.
git bisect log
show bisect log.
git bisect run <cmd>...
use <cmd>... to automatically bisect.
Please use "git help bisect" to get the full man page.'
OPTIONS_SPEC=
. git-sh-setup
. git-sh-i18n
[PATCH] Making it easier to find which change introduced a bug This adds a new "git bisect" command. - "git bisect start" start bisection search. - "git bisect bad <rev>" mark some version known-bad (if no arguments, then current HEAD) - "git bisect good <revs>..." mark some versions known-good (if no arguments, then current HEAD) - "git bisect reset <branch>" done with bisection search and go back to your work (if no arguments, then "master"). The way you use it is: git bisect start git bisect bad # Current version is bad git bisect good v2.6.13-rc2 # v2.6.13-rc2 was the last version # tested that was good When you give at least one bad and one good versions, it will bisect the revision tree and say something like: Bisecting: 675 revisions left to test after this and check out the state in the middle. Now, compile that kernel, and boot it. Now, let's say that this booted kernel works fine, then just do git bisect good # this one is good which will now say Bisecting: 337 revisions left to test after this and you continue along, compiling that one, testing it, and depending on whether it is good or bad, you say "git bisect good" or "git bisect bad", and ask for the next bisection. Until you have no more left, and you'll have been left with the first bad kernel rev in "refs/bisect/bad". Oh, and then after you want to reset to the original head, do a git bisect reset to get back to the master branch, instead of being in one of the bisection branches ("git bisect start" will do that for you too, actually: it will reset the bisection state, and before it does that it checks that you're not using some old bisection branch). Not really any harder than doing series of "quilt push" and "quilt pop", now is it? [jc: This patch is a rework based on what Linus posted to the list. The changes are: - The original introduced four separate commands, which was three too many, so I merged them into one with subcommands. - Since the next thing you would want to do after telling it "bad" and "good" is always to bisect, this version does it automatically for you. - I think the termination condition was wrong. The original version checked if the set of revisions reachable from next bisection but not rechable from any of the known good ones is empty, but if the current bisection was a bad one, this would not terminate, so I changed it to terminate it when the set becomes a singleton or empty. - Removed the use of shell array variable. ] Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-07-30 21:08:20 +04:00
_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_head()
{
if test -f "$GIT_DIR/BISECT_HEAD"
then
echo BISECT_HEAD
else
echo HEAD
fi
}
[PATCH] Making it easier to find which change introduced a bug This adds a new "git bisect" command. - "git bisect start" start bisection search. - "git bisect bad <rev>" mark some version known-bad (if no arguments, then current HEAD) - "git bisect good <revs>..." mark some versions known-good (if no arguments, then current HEAD) - "git bisect reset <branch>" done with bisection search and go back to your work (if no arguments, then "master"). The way you use it is: git bisect start git bisect bad # Current version is bad git bisect good v2.6.13-rc2 # v2.6.13-rc2 was the last version # tested that was good When you give at least one bad and one good versions, it will bisect the revision tree and say something like: Bisecting: 675 revisions left to test after this and check out the state in the middle. Now, compile that kernel, and boot it. Now, let's say that this booted kernel works fine, then just do git bisect good # this one is good which will now say Bisecting: 337 revisions left to test after this and you continue along, compiling that one, testing it, and depending on whether it is good or bad, you say "git bisect good" or "git bisect bad", and ask for the next bisection. Until you have no more left, and you'll have been left with the first bad kernel rev in "refs/bisect/bad". Oh, and then after you want to reset to the original head, do a git bisect reset to get back to the master branch, instead of being in one of the bisection branches ("git bisect start" will do that for you too, actually: it will reset the bisection state, and before it does that it checks that you're not using some old bisection branch). Not really any harder than doing series of "quilt push" and "quilt pop", now is it? [jc: This patch is a rework based on what Linus posted to the list. The changes are: - The original introduced four separate commands, which was three too many, so I merged them into one with subcommands. - Since the next thing you would want to do after telling it "bad" and "good" is always to bisect, this version does it automatically for you. - I think the termination condition was wrong. The original version checked if the set of revisions reachable from next bisection but not rechable from any of the known good ones is empty, but if the current bisection was a bad one, this would not terminate, so I changed it to terminate it when the set becomes a singleton or empty. - Removed the use of shell array variable. ] Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-07-30 21:08:20 +04:00
bisect_autostart() {
test -s "$GIT_DIR/BISECT_START" || {
gettextln "You need to start by \"git bisect start\"" >&2
[PATCH] Making it easier to find which change introduced a bug This adds a new "git bisect" command. - "git bisect start" start bisection search. - "git bisect bad <rev>" mark some version known-bad (if no arguments, then current HEAD) - "git bisect good <revs>..." mark some versions known-good (if no arguments, then current HEAD) - "git bisect reset <branch>" done with bisection search and go back to your work (if no arguments, then "master"). The way you use it is: git bisect start git bisect bad # Current version is bad git bisect good v2.6.13-rc2 # v2.6.13-rc2 was the last version # tested that was good When you give at least one bad and one good versions, it will bisect the revision tree and say something like: Bisecting: 675 revisions left to test after this and check out the state in the middle. Now, compile that kernel, and boot it. Now, let's say that this booted kernel works fine, then just do git bisect good # this one is good which will now say Bisecting: 337 revisions left to test after this and you continue along, compiling that one, testing it, and depending on whether it is good or bad, you say "git bisect good" or "git bisect bad", and ask for the next bisection. Until you have no more left, and you'll have been left with the first bad kernel rev in "refs/bisect/bad". Oh, and then after you want to reset to the original head, do a git bisect reset to get back to the master branch, instead of being in one of the bisection branches ("git bisect start" will do that for you too, actually: it will reset the bisection state, and before it does that it checks that you're not using some old bisection branch). Not really any harder than doing series of "quilt push" and "quilt pop", now is it? [jc: This patch is a rework based on what Linus posted to the list. The changes are: - The original introduced four separate commands, which was three too many, so I merged them into one with subcommands. - Since the next thing you would want to do after telling it "bad" and "good" is always to bisect, this version does it automatically for you. - I think the termination condition was wrong. The original version checked if the set of revisions reachable from next bisection but not rechable from any of the known good ones is empty, but if the current bisection was a bad one, this would not terminate, so I changed it to terminate it when the set becomes a singleton or empty. - Removed the use of shell array variable. ] Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-07-30 21:08:20 +04:00
if test -t 0
then
# TRANSLATORS: Make sure to include [Y] and [n] in your
# translation. The program will only accept English input
# at this point.
gettext "Do you want me to do it for you [Y/n]? " >&2
[PATCH] Making it easier to find which change introduced a bug This adds a new "git bisect" command. - "git bisect start" start bisection search. - "git bisect bad <rev>" mark some version known-bad (if no arguments, then current HEAD) - "git bisect good <revs>..." mark some versions known-good (if no arguments, then current HEAD) - "git bisect reset <branch>" done with bisection search and go back to your work (if no arguments, then "master"). The way you use it is: git bisect start git bisect bad # Current version is bad git bisect good v2.6.13-rc2 # v2.6.13-rc2 was the last version # tested that was good When you give at least one bad and one good versions, it will bisect the revision tree and say something like: Bisecting: 675 revisions left to test after this and check out the state in the middle. Now, compile that kernel, and boot it. Now, let's say that this booted kernel works fine, then just do git bisect good # this one is good which will now say Bisecting: 337 revisions left to test after this and you continue along, compiling that one, testing it, and depending on whether it is good or bad, you say "git bisect good" or "git bisect bad", and ask for the next bisection. Until you have no more left, and you'll have been left with the first bad kernel rev in "refs/bisect/bad". Oh, and then after you want to reset to the original head, do a git bisect reset to get back to the master branch, instead of being in one of the bisection branches ("git bisect start" will do that for you too, actually: it will reset the bisection state, and before it does that it checks that you're not using some old bisection branch). Not really any harder than doing series of "quilt push" and "quilt pop", now is it? [jc: This patch is a rework based on what Linus posted to the list. The changes are: - The original introduced four separate commands, which was three too many, so I merged them into one with subcommands. - Since the next thing you would want to do after telling it "bad" and "good" is always to bisect, this version does it automatically for you. - I think the termination condition was wrong. The original version checked if the set of revisions reachable from next bisection but not rechable from any of the known good ones is empty, but if the current bisection was a bad one, this would not terminate, so I changed it to terminate it when the set becomes a singleton or empty. - Removed the use of shell array variable. ] Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-07-30 21:08:20 +04:00
read yesno
case "$yesno" in
[Nn]*)
exit ;;
esac
bisect_start
else
exit 1
fi
}
}
bisect_start() {
#
# Check for one bad and then some good revisions.
#
has_double_dash=0
for arg; do
case "$arg" in --) has_double_dash=1; break ;; esac
done
orig_args=$(git rev-parse --sq-quote "$@")
bad_seen=0
eval=''
if test "z$(git rev-parse --is-bare-repository)" != zfalse
then
mode=--no-checkout
else
mode=''
fi
while [ $# -gt 0 ]; do
arg="$1"
case "$arg" in
--)
shift
break
;;
--no-checkout)
mode=--no-checkout
shift ;;
--*)
die "$(eval_gettext "unrecognised option: '\$arg'")" ;;
*)
rev=$(git rev-parse -q --verify "$arg^{commit}") || {
test $has_double_dash -eq 1 &&
die "$(eval_gettext "'\$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
[PATCH] Making it easier to find which change introduced a bug This adds a new "git bisect" command. - "git bisect start" start bisection search. - "git bisect bad <rev>" mark some version known-bad (if no arguments, then current HEAD) - "git bisect good <revs>..." mark some versions known-good (if no arguments, then current HEAD) - "git bisect reset <branch>" done with bisection search and go back to your work (if no arguments, then "master"). The way you use it is: git bisect start git bisect bad # Current version is bad git bisect good v2.6.13-rc2 # v2.6.13-rc2 was the last version # tested that was good When you give at least one bad and one good versions, it will bisect the revision tree and say something like: Bisecting: 675 revisions left to test after this and check out the state in the middle. Now, compile that kernel, and boot it. Now, let's say that this booted kernel works fine, then just do git bisect good # this one is good which will now say Bisecting: 337 revisions left to test after this and you continue along, compiling that one, testing it, and depending on whether it is good or bad, you say "git bisect good" or "git bisect bad", and ask for the next bisection. Until you have no more left, and you'll have been left with the first bad kernel rev in "refs/bisect/bad". Oh, and then after you want to reset to the original head, do a git bisect reset to get back to the master branch, instead of being in one of the bisection branches ("git bisect start" will do that for you too, actually: it will reset the bisection state, and before it does that it checks that you're not using some old bisection branch). Not really any harder than doing series of "quilt push" and "quilt pop", now is it? [jc: This patch is a rework based on what Linus posted to the list. The changes are: - The original introduced four separate commands, which was three too many, so I merged them into one with subcommands. - Since the next thing you would want to do after telling it "bad" and "good" is always to bisect, this version does it automatically for you. - I think the termination condition was wrong. The original version checked if the set of revisions reachable from next bisection but not rechable from any of the known good ones is empty, but if the current bisection was a bad one, this would not terminate, so I changed it to terminate it when the set becomes a singleton or empty. - Removed the use of shell array variable. ] Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-07-30 21:08:20 +04:00
#
# Verify HEAD.
[PATCH] Making it easier to find which change introduced a bug This adds a new "git bisect" command. - "git bisect start" start bisection search. - "git bisect bad <rev>" mark some version known-bad (if no arguments, then current HEAD) - "git bisect good <revs>..." mark some versions known-good (if no arguments, then current HEAD) - "git bisect reset <branch>" done with bisection search and go back to your work (if no arguments, then "master"). The way you use it is: git bisect start git bisect bad # Current version is bad git bisect good v2.6.13-rc2 # v2.6.13-rc2 was the last version # tested that was good When you give at least one bad and one good versions, it will bisect the revision tree and say something like: Bisecting: 675 revisions left to test after this and check out the state in the middle. Now, compile that kernel, and boot it. Now, let's say that this booted kernel works fine, then just do git bisect good # this one is good which will now say Bisecting: 337 revisions left to test after this and you continue along, compiling that one, testing it, and depending on whether it is good or bad, you say "git bisect good" or "git bisect bad", and ask for the next bisection. Until you have no more left, and you'll have been left with the first bad kernel rev in "refs/bisect/bad". Oh, and then after you want to reset to the original head, do a git bisect reset to get back to the master branch, instead of being in one of the bisection branches ("git bisect start" will do that for you too, actually: it will reset the bisection state, and before it does that it checks that you're not using some old bisection branch). Not really any harder than doing series of "quilt push" and "quilt pop", now is it? [jc: This patch is a rework based on what Linus posted to the list. The changes are: - The original introduced four separate commands, which was three too many, so I merged them into one with subcommands. - Since the next thing you would want to do after telling it "bad" and "good" is always to bisect, this version does it automatically for you. - I think the termination condition was wrong. The original version checked if the set of revisions reachable from next bisection but not rechable from any of the known good ones is empty, but if the current bisection was a bad one, this would not terminate, so I changed it to terminate it when the set becomes a singleton or empty. - Removed the use of shell array variable. ] Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-07-30 21:08:20 +04:00
#
head=$(GIT_DIR="$GIT_DIR" git symbolic-ref -q HEAD) ||
head=$(GIT_DIR="$GIT_DIR" git rev-parse --verify HEAD) ||
die "$(gettext "Bad HEAD - I need a HEAD")"
#
# Check if we are bisecting.
#
start_head=''
if test -s "$GIT_DIR/BISECT_START"
then
# Reset to the rev from where we started.
start_head=$(cat "$GIT_DIR/BISECT_START")
if test "z$mode" != "z--no-checkout"
then
git checkout "$start_head" -- ||
die "$(eval_gettext "Checking out '\$start_head' failed. Try 'git bisect reset <validbranch>'.")"
fi
else
# Get rev from where we start.
case "$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 "$(gettext "won't bisect on cg-seek'ed tree")"
start_head="${head#refs/heads/}"
;;
*)
die "$(gettext "Bad HEAD - strange symbolic ref")"
;;
esac
fi
[PATCH] Making it easier to find which change introduced a bug This adds a new "git bisect" command. - "git bisect start" start bisection search. - "git bisect bad <rev>" mark some version known-bad (if no arguments, then current HEAD) - "git bisect good <revs>..." mark some versions known-good (if no arguments, then current HEAD) - "git bisect reset <branch>" done with bisection search and go back to your work (if no arguments, then "master"). The way you use it is: git bisect start git bisect bad # Current version is bad git bisect good v2.6.13-rc2 # v2.6.13-rc2 was the last version # tested that was good When you give at least one bad and one good versions, it will bisect the revision tree and say something like: Bisecting: 675 revisions left to test after this and check out the state in the middle. Now, compile that kernel, and boot it. Now, let's say that this booted kernel works fine, then just do git bisect good # this one is good which will now say Bisecting: 337 revisions left to test after this and you continue along, compiling that one, testing it, and depending on whether it is good or bad, you say "git bisect good" or "git bisect bad", and ask for the next bisection. Until you have no more left, and you'll have been left with the first bad kernel rev in "refs/bisect/bad". Oh, and then after you want to reset to the original head, do a git bisect reset to get back to the master branch, instead of being in one of the bisection branches ("git bisect start" will do that for you too, actually: it will reset the bisection state, and before it does that it checks that you're not using some old bisection branch). Not really any harder than doing series of "quilt push" and "quilt pop", now is it? [jc: This patch is a rework based on what Linus posted to the list. The changes are: - The original introduced four separate commands, which was three too many, so I merged them into one with subcommands. - Since the next thing you would want to do after telling it "bad" and "good" is always to bisect, this version does it automatically for you. - I think the termination condition was wrong. The original version checked if the set of revisions reachable from next bisection but not rechable from any of the known good ones is empty, but if the current bisection was a bad one, this would not terminate, so I changed it to terminate it when the set becomes a singleton or empty. - Removed the use of shell array variable. ] Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-07-30 21:08:20 +04:00
#
# Get rid of any old bisect state.
[PATCH] Making it easier to find which change introduced a bug This adds a new "git bisect" command. - "git bisect start" start bisection search. - "git bisect bad <rev>" mark some version known-bad (if no arguments, then current HEAD) - "git bisect good <revs>..." mark some versions known-good (if no arguments, then current HEAD) - "git bisect reset <branch>" done with bisection search and go back to your work (if no arguments, then "master"). The way you use it is: git bisect start git bisect bad # Current version is bad git bisect good v2.6.13-rc2 # v2.6.13-rc2 was the last version # tested that was good When you give at least one bad and one good versions, it will bisect the revision tree and say something like: Bisecting: 675 revisions left to test after this and check out the state in the middle. Now, compile that kernel, and boot it. Now, let's say that this booted kernel works fine, then just do git bisect good # this one is good which will now say Bisecting: 337 revisions left to test after this and you continue along, compiling that one, testing it, and depending on whether it is good or bad, you say "git bisect good" or "git bisect bad", and ask for the next bisection. Until you have no more left, and you'll have been left with the first bad kernel rev in "refs/bisect/bad". Oh, and then after you want to reset to the original head, do a git bisect reset to get back to the master branch, instead of being in one of the bisection branches ("git bisect start" will do that for you too, actually: it will reset the bisection state, and before it does that it checks that you're not using some old bisection branch). Not really any harder than doing series of "quilt push" and "quilt pop", now is it? [jc: This patch is a rework based on what Linus posted to the list. The changes are: - The original introduced four separate commands, which was three too many, so I merged them into one with subcommands. - Since the next thing you would want to do after telling it "bad" and "good" is always to bisect, this version does it automatically for you. - I think the termination condition was wrong. The original version checked if the set of revisions reachable from next bisection but not rechable from any of the known good ones is empty, but if the current bisection was a bad one, this would not terminate, so I changed it to terminate it when the set becomes a singleton or empty. - Removed the use of shell array variable. ] Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-07-30 21:08:20 +04:00
#
bisect_clean_state || exit
#
# 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" >"$GIT_DIR/BISECT_START" && {
test "z$mode" != "z--no-checkout" ||
git update-ref --no-deref BISECT_HEAD "$start_head"
} &&
git rev-parse --sq-quote "$@" >"$GIT_DIR/BISECT_NAMES" &&
eval "$eval true" &&
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
[PATCH] Making it easier to find which change introduced a bug This adds a new "git bisect" command. - "git bisect start" start bisection search. - "git bisect bad <rev>" mark some version known-bad (if no arguments, then current HEAD) - "git bisect good <revs>..." mark some versions known-good (if no arguments, then current HEAD) - "git bisect reset <branch>" done with bisection search and go back to your work (if no arguments, then "master"). The way you use it is: git bisect start git bisect bad # Current version is bad git bisect good v2.6.13-rc2 # v2.6.13-rc2 was the last version # tested that was good When you give at least one bad and one good versions, it will bisect the revision tree and say something like: Bisecting: 675 revisions left to test after this and check out the state in the middle. Now, compile that kernel, and boot it. Now, let's say that this booted kernel works fine, then just do git bisect good # this one is good which will now say Bisecting: 337 revisions left to test after this and you continue along, compiling that one, testing it, and depending on whether it is good or bad, you say "git bisect good" or "git bisect bad", and ask for the next bisection. Until you have no more left, and you'll have been left with the first bad kernel rev in "refs/bisect/bad". Oh, and then after you want to reset to the original head, do a git bisect reset to get back to the master branch, instead of being in one of the bisection branches ("git bisect start" will do that for you too, actually: it will reset the bisection state, and before it does that it checks that you're not using some old bisection branch). Not really any harder than doing series of "quilt push" and "quilt pop", now is it? [jc: This patch is a rework based on what Linus posted to the list. The changes are: - The original introduced four separate commands, which was three too many, so I merged them into one with subcommands. - Since the next thing you would want to do after telling it "bad" and "good" is always to bisect, this version does it automatically for you. - I think the termination condition was wrong. The original version checked if the set of revisions reachable from next bisection but not rechable from any of the known good ones is empty, but if the current bisection was a bad one, this would not terminate, so I changed it to terminate it when the set becomes a singleton or empty. - Removed the use of shell array variable. ] Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-07-30 21:08:20 +04:00
}
bisect_write() {
state="$1"
rev="$2"
nolog="$3"
case "$state" in
bad) tag="$state" ;;
good|skip) tag="$state"-"$rev" ;;
*) die "$(eval_gettext "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 "$(eval_gettext "Bad rev input: \$arg")" ;;
*)
revs=$(git rev-parse --sq-quote "$arg") ;;
esac
all="$all $revs"
done
eval bisect_state 'skip' $all
}
bisect_state() {
[PATCH] Making it easier to find which change introduced a bug This adds a new "git bisect" command. - "git bisect start" start bisection search. - "git bisect bad <rev>" mark some version known-bad (if no arguments, then current HEAD) - "git bisect good <revs>..." mark some versions known-good (if no arguments, then current HEAD) - "git bisect reset <branch>" done with bisection search and go back to your work (if no arguments, then "master"). The way you use it is: git bisect start git bisect bad # Current version is bad git bisect good v2.6.13-rc2 # v2.6.13-rc2 was the last version # tested that was good When you give at least one bad and one good versions, it will bisect the revision tree and say something like: Bisecting: 675 revisions left to test after this and check out the state in the middle. Now, compile that kernel, and boot it. Now, let's say that this booted kernel works fine, then just do git bisect good # this one is good which will now say Bisecting: 337 revisions left to test after this and you continue along, compiling that one, testing it, and depending on whether it is good or bad, you say "git bisect good" or "git bisect bad", and ask for the next bisection. Until you have no more left, and you'll have been left with the first bad kernel rev in "refs/bisect/bad". Oh, and then after you want to reset to the original head, do a git bisect reset to get back to the master branch, instead of being in one of the bisection branches ("git bisect start" will do that for you too, actually: it will reset the bisection state, and before it does that it checks that you're not using some old bisection branch). Not really any harder than doing series of "quilt push" and "quilt pop", now is it? [jc: This patch is a rework based on what Linus posted to the list. The changes are: - The original introduced four separate commands, which was three too many, so I merged them into one with subcommands. - Since the next thing you would want to do after telling it "bad" and "good" is always to bisect, this version does it automatically for you. - I think the termination condition was wrong. The original version checked if the set of revisions reachable from next bisection but not rechable from any of the known good ones is empty, but if the current bisection was a bad one, this would not terminate, so I changed it to terminate it when the set becomes a singleton or empty. - Removed the use of shell array variable. ] Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-07-30 21:08:20 +04:00
bisect_autostart
state=$1
case "$#,$state" in
0,*)
die "$(gettext "Please call 'bisect_state' with at least one argument.")" ;;
1,bad|1,good|1,skip)
rev=$(git rev-parse --verify $(bisect_head)) ||
die "$(gettext "Bad rev input: $(bisect_head)")"
bisect_write "$state" "$rev"
check_expected_revs "$rev" ;;
2,bad|*,good|*,skip)
shift
eval=''
for rev in "$@"
do
sha=$(git rev-parse --verify "$rev^{commit}") ||
die "$(eval_gettext "Bad rev input: \$rev")"
eval="$eval bisect_write '$state' '$sha'; "
done
eval "$eval"
check_expected_revs "$@" ;;
*,bad)
die "$(gettext "'git bisect bad' can take only one argument.")" ;;
*)
usage ;;
[PATCH] Making it easier to find which change introduced a bug This adds a new "git bisect" command. - "git bisect start" start bisection search. - "git bisect bad <rev>" mark some version known-bad (if no arguments, then current HEAD) - "git bisect good <revs>..." mark some versions known-good (if no arguments, then current HEAD) - "git bisect reset <branch>" done with bisection search and go back to your work (if no arguments, then "master"). The way you use it is: git bisect start git bisect bad # Current version is bad git bisect good v2.6.13-rc2 # v2.6.13-rc2 was the last version # tested that was good When you give at least one bad and one good versions, it will bisect the revision tree and say something like: Bisecting: 675 revisions left to test after this and check out the state in the middle. Now, compile that kernel, and boot it. Now, let's say that this booted kernel works fine, then just do git bisect good # this one is good which will now say Bisecting: 337 revisions left to test after this and you continue along, compiling that one, testing it, and depending on whether it is good or bad, you say "git bisect good" or "git bisect bad", and ask for the next bisection. Until you have no more left, and you'll have been left with the first bad kernel rev in "refs/bisect/bad". Oh, and then after you want to reset to the original head, do a git bisect reset to get back to the master branch, instead of being in one of the bisection branches ("git bisect start" will do that for you too, actually: it will reset the bisection state, and before it does that it checks that you're not using some old bisection branch). Not really any harder than doing series of "quilt push" and "quilt pop", now is it? [jc: This patch is a rework based on what Linus posted to the list. The changes are: - The original introduced four separate commands, which was three too many, so I merged them into one with subcommands. - Since the next thing you would want to do after telling it "bad" and "good" is always to bisect, this version does it automatically for you. - I think the termination condition was wrong. The original version checked if the set of revisions reachable from next bisection but not rechable from any of the known good ones is empty, but if the current bisection was a bad one, this would not terminate, so I changed it to terminate it when the set becomes a singleton or empty. - Removed the use of shell array variable. ] Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-07-30 21:08:20 +04:00
esac
bisect_auto_next
}
[PATCH] Making it easier to find which change introduced a bug This adds a new "git bisect" command. - "git bisect start" start bisection search. - "git bisect bad <rev>" mark some version known-bad (if no arguments, then current HEAD) - "git bisect good <revs>..." mark some versions known-good (if no arguments, then current HEAD) - "git bisect reset <branch>" done with bisection search and go back to your work (if no arguments, then "master"). The way you use it is: git bisect start git bisect bad # Current version is bad git bisect good v2.6.13-rc2 # v2.6.13-rc2 was the last version # tested that was good When you give at least one bad and one good versions, it will bisect the revision tree and say something like: Bisecting: 675 revisions left to test after this and check out the state in the middle. Now, compile that kernel, and boot it. Now, let's say that this booted kernel works fine, then just do git bisect good # this one is good which will now say Bisecting: 337 revisions left to test after this and you continue along, compiling that one, testing it, and depending on whether it is good or bad, you say "git bisect good" or "git bisect bad", and ask for the next bisection. Until you have no more left, and you'll have been left with the first bad kernel rev in "refs/bisect/bad". Oh, and then after you want to reset to the original head, do a git bisect reset to get back to the master branch, instead of being in one of the bisection branches ("git bisect start" will do that for you too, actually: it will reset the bisection state, and before it does that it checks that you're not using some old bisection branch). Not really any harder than doing series of "quilt push" and "quilt pop", now is it? [jc: This patch is a rework based on what Linus posted to the list. The changes are: - The original introduced four separate commands, which was three too many, so I merged them into one with subcommands. - Since the next thing you would want to do after telling it "bad" and "good" is always to bisect, this version does it automatically for you. - I think the termination condition was wrong. The original version checked if the set of revisions reachable from next bisection but not rechable from any of the known good ones is empty, but if the current bisection was a bad one, this would not terminate, so I changed it to terminate it when the set becomes a singleton or empty. - Removed the use of shell array variable. ] Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-07-30 21:08:20 +04:00
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,$1" in
,,*)
: have both good and bad - ok
;;
*,)
# do not have both but not asked to fail - just report.
false
;;
t,,good)
# have bad but not good. we could bisect although
# this is less optimum.
gettextln "Warning: bisecting only with a bad commit." >&2
if test -t 0
then
# TRANSLATORS: Make sure to include [Y] and [n] in your
# translation. The program will only accept English input
# at this point.
gettext "Are you sure [Y/n]? " >&2
read yesno
case "$yesno" in [Nn]*) exit 1 ;; esac
fi
: bisect without good...
;;
[PATCH] Making it easier to find which change introduced a bug This adds a new "git bisect" command. - "git bisect start" start bisection search. - "git bisect bad <rev>" mark some version known-bad (if no arguments, then current HEAD) - "git bisect good <revs>..." mark some versions known-good (if no arguments, then current HEAD) - "git bisect reset <branch>" done with bisection search and go back to your work (if no arguments, then "master"). The way you use it is: git bisect start git bisect bad # Current version is bad git bisect good v2.6.13-rc2 # v2.6.13-rc2 was the last version # tested that was good When you give at least one bad and one good versions, it will bisect the revision tree and say something like: Bisecting: 675 revisions left to test after this and check out the state in the middle. Now, compile that kernel, and boot it. Now, let's say that this booted kernel works fine, then just do git bisect good # this one is good which will now say Bisecting: 337 revisions left to test after this and you continue along, compiling that one, testing it, and depending on whether it is good or bad, you say "git bisect good" or "git bisect bad", and ask for the next bisection. Until you have no more left, and you'll have been left with the first bad kernel rev in "refs/bisect/bad". Oh, and then after you want to reset to the original head, do a git bisect reset to get back to the master branch, instead of being in one of the bisection branches ("git bisect start" will do that for you too, actually: it will reset the bisection state, and before it does that it checks that you're not using some old bisection branch). Not really any harder than doing series of "quilt push" and "quilt pop", now is it? [jc: This patch is a rework based on what Linus posted to the list. The changes are: - The original introduced four separate commands, which was three too many, so I merged them into one with subcommands. - Since the next thing you would want to do after telling it "bad" and "good" is always to bisect, this version does it automatically for you. - I think the termination condition was wrong. The original version checked if the set of revisions reachable from next bisection but not rechable from any of the known good ones is empty, but if the current bisection was a bad one, this would not terminate, so I changed it to terminate it when the set becomes a singleton or empty. - Removed the use of shell array variable. ] Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-07-30 21:08:20 +04:00
*)
if test -s "$GIT_DIR/BISECT_START"
then
gettextln "You need to give me at least one good and one bad revisions.
(You can use \"git bisect bad\" and \"git bisect good\" for that.)" >&2
else
gettextln "You need to start by \"git bisect start\".
You then need to give me at least one good and one bad revisions.
(You can use \"git bisect bad\" and \"git bisect good\" for that.)" >&2
fi
exit 1 ;;
[PATCH] Making it easier to find which change introduced a bug This adds a new "git bisect" command. - "git bisect start" start bisection search. - "git bisect bad <rev>" mark some version known-bad (if no arguments, then current HEAD) - "git bisect good <revs>..." mark some versions known-good (if no arguments, then current HEAD) - "git bisect reset <branch>" done with bisection search and go back to your work (if no arguments, then "master"). The way you use it is: git bisect start git bisect bad # Current version is bad git bisect good v2.6.13-rc2 # v2.6.13-rc2 was the last version # tested that was good When you give at least one bad and one good versions, it will bisect the revision tree and say something like: Bisecting: 675 revisions left to test after this and check out the state in the middle. Now, compile that kernel, and boot it. Now, let's say that this booted kernel works fine, then just do git bisect good # this one is good which will now say Bisecting: 337 revisions left to test after this and you continue along, compiling that one, testing it, and depending on whether it is good or bad, you say "git bisect good" or "git bisect bad", and ask for the next bisection. Until you have no more left, and you'll have been left with the first bad kernel rev in "refs/bisect/bad". Oh, and then after you want to reset to the original head, do a git bisect reset to get back to the master branch, instead of being in one of the bisection branches ("git bisect start" will do that for you too, actually: it will reset the bisection state, and before it does that it checks that you're not using some old bisection branch). Not really any harder than doing series of "quilt push" and "quilt pop", now is it? [jc: This patch is a rework based on what Linus posted to the list. The changes are: - The original introduced four separate commands, which was three too many, so I merged them into one with subcommands. - Since the next thing you would want to do after telling it "bad" and "good" is always to bisect, this version does it automatically for you. - I think the termination condition was wrong. The original version checked if the set of revisions reachable from next bisection but not rechable from any of the known good ones is empty, but if the current bisection was a bad one, this would not terminate, so I changed it to terminate it when the set becomes a singleton or empty. - Removed the use of shell array variable. ] Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-07-30 21:08:20 +04:00
esac
}
bisect_auto_next() {
bisect_next_check && bisect_next || :
[PATCH] Making it easier to find which change introduced a bug This adds a new "git bisect" command. - "git bisect start" start bisection search. - "git bisect bad <rev>" mark some version known-bad (if no arguments, then current HEAD) - "git bisect good <revs>..." mark some versions known-good (if no arguments, then current HEAD) - "git bisect reset <branch>" done with bisection search and go back to your work (if no arguments, then "master"). The way you use it is: git bisect start git bisect bad # Current version is bad git bisect good v2.6.13-rc2 # v2.6.13-rc2 was the last version # tested that was good When you give at least one bad and one good versions, it will bisect the revision tree and say something like: Bisecting: 675 revisions left to test after this and check out the state in the middle. Now, compile that kernel, and boot it. Now, let's say that this booted kernel works fine, then just do git bisect good # this one is good which will now say Bisecting: 337 revisions left to test after this and you continue along, compiling that one, testing it, and depending on whether it is good or bad, you say "git bisect good" or "git bisect bad", and ask for the next bisection. Until you have no more left, and you'll have been left with the first bad kernel rev in "refs/bisect/bad". Oh, and then after you want to reset to the original head, do a git bisect reset to get back to the master branch, instead of being in one of the bisection branches ("git bisect start" will do that for you too, actually: it will reset the bisection state, and before it does that it checks that you're not using some old bisection branch). Not really any harder than doing series of "quilt push" and "quilt pop", now is it? [jc: This patch is a rework based on what Linus posted to the list. The changes are: - The original introduced four separate commands, which was three too many, so I merged them into one with subcommands. - Since the next thing you would want to do after telling it "bad" and "good" is always to bisect, this version does it automatically for you. - I think the termination condition was wrong. The original version checked if the set of revisions reachable from next bisection but not rechable from any of the known good ones is empty, but if the current bisection was a bad one, this would not terminate, so I changed it to terminate it when the set becomes a singleton or empty. - Removed the use of shell array variable. ] Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-07-30 21:08:20 +04:00
}
bisect_next() {
case "$#" in 0) ;; *) usage ;; esac
[PATCH] Making it easier to find which change introduced a bug This adds a new "git bisect" command. - "git bisect start" start bisection search. - "git bisect bad <rev>" mark some version known-bad (if no arguments, then current HEAD) - "git bisect good <revs>..." mark some versions known-good (if no arguments, then current HEAD) - "git bisect reset <branch>" done with bisection search and go back to your work (if no arguments, then "master"). The way you use it is: git bisect start git bisect bad # Current version is bad git bisect good v2.6.13-rc2 # v2.6.13-rc2 was the last version # tested that was good When you give at least one bad and one good versions, it will bisect the revision tree and say something like: Bisecting: 675 revisions left to test after this and check out the state in the middle. Now, compile that kernel, and boot it. Now, let's say that this booted kernel works fine, then just do git bisect good # this one is good which will now say Bisecting: 337 revisions left to test after this and you continue along, compiling that one, testing it, and depending on whether it is good or bad, you say "git bisect good" or "git bisect bad", and ask for the next bisection. Until you have no more left, and you'll have been left with the first bad kernel rev in "refs/bisect/bad". Oh, and then after you want to reset to the original head, do a git bisect reset to get back to the master branch, instead of being in one of the bisection branches ("git bisect start" will do that for you too, actually: it will reset the bisection state, and before it does that it checks that you're not using some old bisection branch). Not really any harder than doing series of "quilt push" and "quilt pop", now is it? [jc: This patch is a rework based on what Linus posted to the list. The changes are: - The original introduced four separate commands, which was three too many, so I merged them into one with subcommands. - Since the next thing you would want to do after telling it "bad" and "good" is always to bisect, this version does it automatically for you. - I think the termination condition was wrong. The original version checked if the set of revisions reachable from next bisection but not rechable from any of the known good ones is empty, but if the current bisection was a bad one, this would not terminate, so I changed it to terminate it when the set becomes a singleton or empty. - Removed the use of shell array variable. ] Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-07-30 21:08:20 +04:00
bisect_autostart
bisect_next_check good
# Perform all bisection computation, display and checkout
git bisect--helper --next-all $(test -f "$GIT_DIR/BISECT_HEAD" && echo --no-checkout)
res=$?
# Check if we should exit because bisection is finished
if test $res -eq 10
then
bad_rev=$(git show-ref --hash --verify refs/bisect/bad)
bad_commit=$(git show-branch $bad_rev)
echo "# first bad commit: $bad_commit" >>"$GIT_DIR/BISECT_LOG"
exit 0
elif test $res -eq 2
then
echo "# only skipped commits left to test" >>"$GIT_DIR/BISECT_LOG"
good_revs=$(git for-each-ref --format="%(objectname)" "refs/bisect/good-*")
for skipped in $(git rev-list refs/bisect/bad --not $good_revs)
do
skipped_commit=$(git show-branch $skipped)
echo "# possible first bad commit: $skipped_commit" >>"$GIT_DIR/BISECT_LOG"
done
exit $res
fi
# Check for an error in the bisection process
test $res -ne 0 && exit $res
return 0
[PATCH] Making it easier to find which change introduced a bug This adds a new "git bisect" command. - "git bisect start" start bisection search. - "git bisect bad <rev>" mark some version known-bad (if no arguments, then current HEAD) - "git bisect good <revs>..." mark some versions known-good (if no arguments, then current HEAD) - "git bisect reset <branch>" done with bisection search and go back to your work (if no arguments, then "master"). The way you use it is: git bisect start git bisect bad # Current version is bad git bisect good v2.6.13-rc2 # v2.6.13-rc2 was the last version # tested that was good When you give at least one bad and one good versions, it will bisect the revision tree and say something like: Bisecting: 675 revisions left to test after this and check out the state in the middle. Now, compile that kernel, and boot it. Now, let's say that this booted kernel works fine, then just do git bisect good # this one is good which will now say Bisecting: 337 revisions left to test after this and you continue along, compiling that one, testing it, and depending on whether it is good or bad, you say "git bisect good" or "git bisect bad", and ask for the next bisection. Until you have no more left, and you'll have been left with the first bad kernel rev in "refs/bisect/bad". Oh, and then after you want to reset to the original head, do a git bisect reset to get back to the master branch, instead of being in one of the bisection branches ("git bisect start" will do that for you too, actually: it will reset the bisection state, and before it does that it checks that you're not using some old bisection branch). Not really any harder than doing series of "quilt push" and "quilt pop", now is it? [jc: This patch is a rework based on what Linus posted to the list. The changes are: - The original introduced four separate commands, which was three too many, so I merged them into one with subcommands. - Since the next thing you would want to do after telling it "bad" and "good" is always to bisect, this version does it automatically for you. - I think the termination condition was wrong. The original version checked if the set of revisions reachable from next bisection but not rechable from any of the known good ones is empty, but if the current bisection was a bad one, this would not terminate, so I changed it to terminate it when the set becomes a singleton or empty. - Removed the use of shell array variable. ] Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-07-30 21:08:20 +04:00
}
bisect_visualize() {
bisect_next_check fail
if test $# = 0
then
if test -n "${DISPLAY+set}${SESSIONNAME+set}${MSYSTEM+set}${SECURITYSESSIONID+set}" &&
type gitk >/dev/null 2>&1
then
set gitk
else
set git log
fi
else
case "$1" in
git*|tig) ;;
-*) set git log "$@" ;;
*) set git "$@" ;;
esac
fi
eval '"$@"' --bisect -- $(cat "$GIT_DIR/BISECT_NAMES")
}
[PATCH] Making it easier to find which change introduced a bug This adds a new "git bisect" command. - "git bisect start" start bisection search. - "git bisect bad <rev>" mark some version known-bad (if no arguments, then current HEAD) - "git bisect good <revs>..." mark some versions known-good (if no arguments, then current HEAD) - "git bisect reset <branch>" done with bisection search and go back to your work (if no arguments, then "master"). The way you use it is: git bisect start git bisect bad # Current version is bad git bisect good v2.6.13-rc2 # v2.6.13-rc2 was the last version # tested that was good When you give at least one bad and one good versions, it will bisect the revision tree and say something like: Bisecting: 675 revisions left to test after this and check out the state in the middle. Now, compile that kernel, and boot it. Now, let's say that this booted kernel works fine, then just do git bisect good # this one is good which will now say Bisecting: 337 revisions left to test after this and you continue along, compiling that one, testing it, and depending on whether it is good or bad, you say "git bisect good" or "git bisect bad", and ask for the next bisection. Until you have no more left, and you'll have been left with the first bad kernel rev in "refs/bisect/bad". Oh, and then after you want to reset to the original head, do a git bisect reset to get back to the master branch, instead of being in one of the bisection branches ("git bisect start" will do that for you too, actually: it will reset the bisection state, and before it does that it checks that you're not using some old bisection branch). Not really any harder than doing series of "quilt push" and "quilt pop", now is it? [jc: This patch is a rework based on what Linus posted to the list. The changes are: - The original introduced four separate commands, which was three too many, so I merged them into one with subcommands. - Since the next thing you would want to do after telling it "bad" and "good" is always to bisect, this version does it automatically for you. - I think the termination condition was wrong. The original version checked if the set of revisions reachable from next bisection but not rechable from any of the known good ones is empty, but if the current bisection was a bad one, this would not terminate, so I changed it to terminate it when the set becomes a singleton or empty. - Removed the use of shell array variable. ] Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-07-30 21:08:20 +04:00
bisect_reset() {
test -s "$GIT_DIR/BISECT_START" || {
gettextln "We are not bisecting."
return
}
[PATCH] Making it easier to find which change introduced a bug This adds a new "git bisect" command. - "git bisect start" start bisection search. - "git bisect bad <rev>" mark some version known-bad (if no arguments, then current HEAD) - "git bisect good <revs>..." mark some versions known-good (if no arguments, then current HEAD) - "git bisect reset <branch>" done with bisection search and go back to your work (if no arguments, then "master"). The way you use it is: git bisect start git bisect bad # Current version is bad git bisect good v2.6.13-rc2 # v2.6.13-rc2 was the last version # tested that was good When you give at least one bad and one good versions, it will bisect the revision tree and say something like: Bisecting: 675 revisions left to test after this and check out the state in the middle. Now, compile that kernel, and boot it. Now, let's say that this booted kernel works fine, then just do git bisect good # this one is good which will now say Bisecting: 337 revisions left to test after this and you continue along, compiling that one, testing it, and depending on whether it is good or bad, you say "git bisect good" or "git bisect bad", and ask for the next bisection. Until you have no more left, and you'll have been left with the first bad kernel rev in "refs/bisect/bad". Oh, and then after you want to reset to the original head, do a git bisect reset to get back to the master branch, instead of being in one of the bisection branches ("git bisect start" will do that for you too, actually: it will reset the bisection state, and before it does that it checks that you're not using some old bisection branch). Not really any harder than doing series of "quilt push" and "quilt pop", now is it? [jc: This patch is a rework based on what Linus posted to the list. The changes are: - The original introduced four separate commands, which was three too many, so I merged them into one with subcommands. - Since the next thing you would want to do after telling it "bad" and "good" is always to bisect, this version does it automatically for you. - I think the termination condition was wrong. The original version checked if the set of revisions reachable from next bisection but not rechable from any of the known good ones is empty, but if the current bisection was a bad one, this would not terminate, so I changed it to terminate it when the set becomes a singleton or empty. - Removed the use of shell array variable. ] Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-07-30 21:08:20 +04:00
case "$#" in
0) branch=$(cat "$GIT_DIR/BISECT_START") ;;
1) git rev-parse --quiet --verify "$1^{commit}" > /dev/null || {
invalid="$1"
die "$(eval_gettext "'\$invalid' is not a valid commit")"
}
branch="$1" ;;
*)
usage ;;
[PATCH] Making it easier to find which change introduced a bug This adds a new "git bisect" command. - "git bisect start" start bisection search. - "git bisect bad <rev>" mark some version known-bad (if no arguments, then current HEAD) - "git bisect good <revs>..." mark some versions known-good (if no arguments, then current HEAD) - "git bisect reset <branch>" done with bisection search and go back to your work (if no arguments, then "master"). The way you use it is: git bisect start git bisect bad # Current version is bad git bisect good v2.6.13-rc2 # v2.6.13-rc2 was the last version # tested that was good When you give at least one bad and one good versions, it will bisect the revision tree and say something like: Bisecting: 675 revisions left to test after this and check out the state in the middle. Now, compile that kernel, and boot it. Now, let's say that this booted kernel works fine, then just do git bisect good # this one is good which will now say Bisecting: 337 revisions left to test after this and you continue along, compiling that one, testing it, and depending on whether it is good or bad, you say "git bisect good" or "git bisect bad", and ask for the next bisection. Until you have no more left, and you'll have been left with the first bad kernel rev in "refs/bisect/bad". Oh, and then after you want to reset to the original head, do a git bisect reset to get back to the master branch, instead of being in one of the bisection branches ("git bisect start" will do that for you too, actually: it will reset the bisection state, and before it does that it checks that you're not using some old bisection branch). Not really any harder than doing series of "quilt push" and "quilt pop", now is it? [jc: This patch is a rework based on what Linus posted to the list. The changes are: - The original introduced four separate commands, which was three too many, so I merged them into one with subcommands. - Since the next thing you would want to do after telling it "bad" and "good" is always to bisect, this version does it automatically for you. - I think the termination condition was wrong. The original version checked if the set of revisions reachable from next bisection but not rechable from any of the known good ones is empty, but if the current bisection was a bad one, this would not terminate, so I changed it to terminate it when the set becomes a singleton or empty. - Removed the use of shell array variable. ] Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-07-30 21:08:20 +04:00
esac
if ! test -f "$GIT_DIR/BISECT_HEAD" && ! git checkout "$branch" --
then
die "$(eval_gettext "Could not check out original HEAD '\$branch'.
Try 'git bisect reset <commit>'.")"
fi
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 "$GIT_DIR/head-name" &&
git update-ref -d --no-deref BISECT_HEAD &&
# clean up BISECT_START last
rm -f "$GIT_DIR/BISECT_START"
}
bisect_replay () {
file="$1"
test "$#" -eq 1 || die "$(gettext "No logfile given")"
test -r "$file" || die "$(eval_gettext "cannot read \$file for replaying")"
bisect_reset
while read git bisect command rev
do
test "$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 "$(gettext "?? what are you talking about?")" ;;
esac
done <"$file"
bisect_auto_next
[PATCH] Making it easier to find which change introduced a bug This adds a new "git bisect" command. - "git bisect start" start bisection search. - "git bisect bad <rev>" mark some version known-bad (if no arguments, then current HEAD) - "git bisect good <revs>..." mark some versions known-good (if no arguments, then current HEAD) - "git bisect reset <branch>" done with bisection search and go back to your work (if no arguments, then "master"). The way you use it is: git bisect start git bisect bad # Current version is bad git bisect good v2.6.13-rc2 # v2.6.13-rc2 was the last version # tested that was good When you give at least one bad and one good versions, it will bisect the revision tree and say something like: Bisecting: 675 revisions left to test after this and check out the state in the middle. Now, compile that kernel, and boot it. Now, let's say that this booted kernel works fine, then just do git bisect good # this one is good which will now say Bisecting: 337 revisions left to test after this and you continue along, compiling that one, testing it, and depending on whether it is good or bad, you say "git bisect good" or "git bisect bad", and ask for the next bisection. Until you have no more left, and you'll have been left with the first bad kernel rev in "refs/bisect/bad". Oh, and then after you want to reset to the original head, do a git bisect reset to get back to the master branch, instead of being in one of the bisection branches ("git bisect start" will do that for you too, actually: it will reset the bisection state, and before it does that it checks that you're not using some old bisection branch). Not really any harder than doing series of "quilt push" and "quilt pop", now is it? [jc: This patch is a rework based on what Linus posted to the list. The changes are: - The original introduced four separate commands, which was three too many, so I merged them into one with subcommands. - Since the next thing you would want to do after telling it "bad" and "good" is always to bisect, this version does it automatically for you. - I think the termination condition was wrong. The original version checked if the set of revisions reachable from next bisection but not rechable from any of the known good ones is empty, but if the current bisection was a bad one, this would not terminate, so I changed it to terminate it when the set becomes a singleton or empty. - Removed the use of shell array variable. ] Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-07-30 21:08:20 +04:00
}
bisect_run () {
bisect_next_check fail
while true
do
command="$@"
eval_gettextln "running \$command"
"$@"
res=$?
# Check for really bad run error.
if [ $res -lt 0 -o $res -ge 128 ]
then
eval_gettextln "bisect run failed:
exit code \$res from '\$command' is < 0 or >= 128" >&2
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
gettextln "bisect run cannot continue any more" >&2
exit $res
fi
if [ $res -ne 0 ]
then
eval_gettextln "bisect run failed:
'bisect_state \$state' exited with error code \$res" >&2
exit $res
fi
if sane_grep "is the first bad commit" "$GIT_DIR/BISECT_RUN" > /dev/null
then
gettextln "bisect run success"
exit 0;
fi
done
}
bisect_log () {
test -s "$GIT_DIR/BISECT_LOG" || die "$(gettext "We are not bisecting.")"
cat "$GIT_DIR/BISECT_LOG"
}
[PATCH] Making it easier to find which change introduced a bug This adds a new "git bisect" command. - "git bisect start" start bisection search. - "git bisect bad <rev>" mark some version known-bad (if no arguments, then current HEAD) - "git bisect good <revs>..." mark some versions known-good (if no arguments, then current HEAD) - "git bisect reset <branch>" done with bisection search and go back to your work (if no arguments, then "master"). The way you use it is: git bisect start git bisect bad # Current version is bad git bisect good v2.6.13-rc2 # v2.6.13-rc2 was the last version # tested that was good When you give at least one bad and one good versions, it will bisect the revision tree and say something like: Bisecting: 675 revisions left to test after this and check out the state in the middle. Now, compile that kernel, and boot it. Now, let's say that this booted kernel works fine, then just do git bisect good # this one is good which will now say Bisecting: 337 revisions left to test after this and you continue along, compiling that one, testing it, and depending on whether it is good or bad, you say "git bisect good" or "git bisect bad", and ask for the next bisection. Until you have no more left, and you'll have been left with the first bad kernel rev in "refs/bisect/bad". Oh, and then after you want to reset to the original head, do a git bisect reset to get back to the master branch, instead of being in one of the bisection branches ("git bisect start" will do that for you too, actually: it will reset the bisection state, and before it does that it checks that you're not using some old bisection branch). Not really any harder than doing series of "quilt push" and "quilt pop", now is it? [jc: This patch is a rework based on what Linus posted to the list. The changes are: - The original introduced four separate commands, which was three too many, so I merged them into one with subcommands. - Since the next thing you would want to do after telling it "bad" and "good" is always to bisect, this version does it automatically for you. - I think the termination condition was wrong. The original version checked if the set of revisions reachable from next bisection but not rechable from any of the known good ones is empty, but if the current bisection was a bad one, this would not terminate, so I changed it to terminate it when the set becomes a singleton or empty. - Removed the use of shell array variable. ] Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-07-30 21:08:20 +04:00
case "$#" in
0)
usage ;;
[PATCH] Making it easier to find which change introduced a bug This adds a new "git bisect" command. - "git bisect start" start bisection search. - "git bisect bad <rev>" mark some version known-bad (if no arguments, then current HEAD) - "git bisect good <revs>..." mark some versions known-good (if no arguments, then current HEAD) - "git bisect reset <branch>" done with bisection search and go back to your work (if no arguments, then "master"). The way you use it is: git bisect start git bisect bad # Current version is bad git bisect good v2.6.13-rc2 # v2.6.13-rc2 was the last version # tested that was good When you give at least one bad and one good versions, it will bisect the revision tree and say something like: Bisecting: 675 revisions left to test after this and check out the state in the middle. Now, compile that kernel, and boot it. Now, let's say that this booted kernel works fine, then just do git bisect good # this one is good which will now say Bisecting: 337 revisions left to test after this and you continue along, compiling that one, testing it, and depending on whether it is good or bad, you say "git bisect good" or "git bisect bad", and ask for the next bisection. Until you have no more left, and you'll have been left with the first bad kernel rev in "refs/bisect/bad". Oh, and then after you want to reset to the original head, do a git bisect reset to get back to the master branch, instead of being in one of the bisection branches ("git bisect start" will do that for you too, actually: it will reset the bisection state, and before it does that it checks that you're not using some old bisection branch). Not really any harder than doing series of "quilt push" and "quilt pop", now is it? [jc: This patch is a rework based on what Linus posted to the list. The changes are: - The original introduced four separate commands, which was three too many, so I merged them into one with subcommands. - Since the next thing you would want to do after telling it "bad" and "good" is always to bisect, this version does it automatically for you. - I think the termination condition was wrong. The original version checked if the set of revisions reachable from next bisection but not rechable from any of the known good ones is empty, but if the current bisection was a bad one, this would not terminate, so I changed it to terminate it when the set becomes a singleton or empty. - Removed the use of shell array variable. ] Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-07-30 21:08:20 +04:00
*)
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)
bisect_log ;;
run)
bisect_run "$@" ;;
*)
usage ;;
esac
[PATCH] Making it easier to find which change introduced a bug This adds a new "git bisect" command. - "git bisect start" start bisection search. - "git bisect bad <rev>" mark some version known-bad (if no arguments, then current HEAD) - "git bisect good <revs>..." mark some versions known-good (if no arguments, then current HEAD) - "git bisect reset <branch>" done with bisection search and go back to your work (if no arguments, then "master"). The way you use it is: git bisect start git bisect bad # Current version is bad git bisect good v2.6.13-rc2 # v2.6.13-rc2 was the last version # tested that was good When you give at least one bad and one good versions, it will bisect the revision tree and say something like: Bisecting: 675 revisions left to test after this and check out the state in the middle. Now, compile that kernel, and boot it. Now, let's say that this booted kernel works fine, then just do git bisect good # this one is good which will now say Bisecting: 337 revisions left to test after this and you continue along, compiling that one, testing it, and depending on whether it is good or bad, you say "git bisect good" or "git bisect bad", and ask for the next bisection. Until you have no more left, and you'll have been left with the first bad kernel rev in "refs/bisect/bad". Oh, and then after you want to reset to the original head, do a git bisect reset to get back to the master branch, instead of being in one of the bisection branches ("git bisect start" will do that for you too, actually: it will reset the bisection state, and before it does that it checks that you're not using some old bisection branch). Not really any harder than doing series of "quilt push" and "quilt pop", now is it? [jc: This patch is a rework based on what Linus posted to the list. The changes are: - The original introduced four separate commands, which was three too many, so I merged them into one with subcommands. - Since the next thing you would want to do after telling it "bad" and "good" is always to bisect, this version does it automatically for you. - I think the termination condition was wrong. The original version checked if the set of revisions reachable from next bisection but not rechable from any of the known good ones is empty, but if the current bisection was a bad one, this would not terminate, so I changed it to terminate it when the set becomes a singleton or empty. - Removed the use of shell array variable. ] Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-07-30 21:08:20 +04:00
esac