From 4796e823a3d24d29dbcccfda166d6c88051cbfaa Mon Sep 17 00:00:00 2001 From: Jon Seymour Date: Thu, 4 Aug 2011 22:01:01 +1000 Subject: [PATCH] bisect: introduce --no-checkout support into porcelain. git-bisect can now perform bisection of a history without performing a checkout at each stage of the bisection process. Instead, HEAD is updated. One use-case for this function is allow git bisect to be used with damaged repositories where git checkout would fail because the tree referenced by the commit is damaged. It can also be used in other cases where actual checkout of the tree is not required to progress the bisection. Improved-by: Christian Couder Improved-by: Junio C Hamano Improved-by: Jonathan Nieder Signed-off-by: Jon Seymour Signed-off-by: Junio C Hamano --- git-bisect.sh | 48 +++++++++++++++++++++++++++++++++++++----------- 1 file changed, 37 insertions(+), 11 deletions(-) diff --git a/git-bisect.sh b/git-bisect.sh index a44ffe1ea..b9c18dd20 100755 --- a/git-bisect.sh +++ b/git-bisect.sh @@ -3,7 +3,7 @@ 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 [ [...]] [--] [...] +git bisect start [--no-checkout] [ [...]] [--] [...] reset bisect state and start bisection. git bisect bad [] mark a known-bad revision. @@ -34,6 +34,16 @@ 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_head() +{ + if test -f "$GIT_DIR/BISECT_HEAD" + then + echo BISECT_HEAD + else + echo HEAD + fi +} + bisect_autostart() { test -s "$GIT_DIR/BISECT_START" || { ( @@ -69,6 +79,7 @@ bisect_start() { orig_args=$(git rev-parse --sq-quote "$@") bad_seen=0 eval='' + mode='' while [ $# -gt 0 ]; do arg="$1" case "$arg" in @@ -76,6 +87,11 @@ bisect_start() { shift break ;; + --no-checkout) + mode=--no-checkout + shift ;; + --*) + die "$(eval_gettext "unrecognised option: '\$arg'")" ;; *) rev=$(git rev-parse -q --verify "$arg^{commit}") || { test $has_double_dash -eq 1 && @@ -107,7 +123,10 @@ bisect_start() { then # Reset to the rev from where we started. start_head=$(cat "$GIT_DIR/BISECT_START") - git checkout "$start_head" -- || exit + if test "z$mode" != "z--no-checkout" + then + git checkout "$start_head" -- + fi else # Get rev from where we start. case "$head" in @@ -143,7 +162,10 @@ bisect_start() { # # Write new start state. # - echo "$start_head" >"$GIT_DIR/BISECT_START" && + echo "$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 @@ -206,8 +228,8 @@ bisect_state() { 0,*) die "$(gettext "Please call 'bisect_state' with at least one argument.")" ;; 1,bad|1,good|1,skip) - rev=$(git rev-parse --verify HEAD) || - die "$(gettext "Bad rev input: HEAD")" + rev=$(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) @@ -291,7 +313,7 @@ bisect_next() { bisect_next_check good # Perform all bisection computation, display and checkout - git bisect--helper --next-all + git bisect--helper --next-all $(test -f "$GIT_DIR/BISECT_HEAD" && echo --no-checkout) res=$? # Check if we should exit because bisection is finished @@ -340,12 +362,15 @@ bisect_reset() { *) usage ;; esac - if git checkout "$branch" -- ; then - bisect_clean_state - else - die "$(eval_gettext "Could not check out original HEAD '\$branch'. + if ! test -f "$GIT_DIR/BISECT_HEAD" + then + if ! git checkout "$branch" -- + then + die "$(eval_gettext "Could not check out original HEAD '\$branch'. Try 'git bisect reset '.")" + fi fi + bisect_clean_state } bisect_clean_state() { @@ -362,7 +387,8 @@ bisect_clean_state() { 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" } -- 2.30.2