[PATCH v14 5/8] bisect: introduce --no-checkout support into porcelain.
From: Jon Seymour <hidden>
Date: 2016-06-15 22:51:43
Subsystem:
the rest · Maintainer:
Linus Torvalds
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 [off-list ref] Signed-off-by: Jon Seymour <redacted> --- git-bisect.sh | 32 +++++++++++++++++++++++++------- 1 files changed, 25 insertions(+), 7 deletions(-)
diff --git a/git-bisect.sh b/git-bisect.sh
index a44ffe1..99a2637 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 [<bad> [<good>...]] [--] [<pathspec>...] +git bisect start [--no-checkout] [<bad> [<good>...]] [--] [<pathspec>...] reset bisect state and start bisection. git bisect bad [<rev>] mark <rev> a known-bad revision.
@@ -34,6 +34,8 @@ 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_MODE=$(test -f "$GIT_DIR/BISECT_MODE" && cat "$GIT_DIR/BISECT_MODE") + bisect_autostart() { test -s "$GIT_DIR/BISECT_START" || { (
@@ -69,6 +71,7 @@ bisect_start() { orig_args=$(git rev-parse --sq-quote "$@") bad_seen=0 eval='' + BISECT_MODE= while [ $# -gt 0 ]; do arg="$1" case "$arg" in
@@ -76,6 +79,11 @@ bisect_start() { shift break ;; + --no-checkout) + BISECT_MODE=--no-checkout; + shift ;; + --*) + die "$(eval_gettext "unrecognised option: '\$arg'")" ;; *) rev=$(git rev-parse -q --verify "$arg^{commit}") || { test $has_double_dash -eq 1 &&
@@ -107,7 +115,11 @@ bisect_start() { then # Reset to the rev from where we started. start_head=$(cat "$GIT_DIR/BISECT_START") - git checkout "$start_head" -- || exit + if test "$BISECT_MODE" = "--no-checkout"; then + git update-ref --no-deref HEAD "$start_head" + else + git checkout "$start_head" -- + fi else # Get rev from where we start. case "$head" in
@@ -144,7 +156,8 @@ bisect_start() { # Write new start state. # echo "$start_head" >"$GIT_DIR/BISECT_START" && - git rev-parse --sq-quote "$@" >"$GIT_DIR/BISECT_NAMES" && + git rev-parse --sq-quote "$@" >"$GIT_DIR/BISECT_NAMES" + echo "$BISECT_MODE" > "$GIT_DIR/BISECT_MODE" && eval "$eval true" && echo "git bisect start$orig_args" >>"$GIT_DIR/BISECT_LOG" || exit #
@@ -291,7 +304,7 @@ bisect_next() { bisect_next_check good # Perform all bisection computation, display and checkout - git bisect--helper --next-all + git bisect--helper --next-all ${BISECT_MODE} res=$? # Check if we should exit because bisection is finished
@@ -340,11 +353,15 @@ bisect_reset() { *) usage ;; esac - if git checkout "$branch" -- ; then - bisect_clean_state + if test "$BISECT_MODE" = "--no-checkout"; then + git symbolic-ref HEAD $(git rev-parse --symbolic-full-name "${branch}") else - die "$(eval_gettext "Could not check out original HEAD '\$branch'. + if git checkout "$branch" --; then + bisect_clean_state + else + die "$(eval_gettext "Could not check out original HEAD '\$branch'. Try 'git bisect reset <commit>'.")" + fi fi }
@@ -360,6 +377,7 @@ bisect_clean_state() { rm -f "$GIT_DIR/BISECT_LOG" && rm -f "$GIT_DIR/BISECT_NAMES" && rm -f "$GIT_DIR/BISECT_RUN" && + rm -f "$GIT_DIR/BISECT_MODE" && # Cleanup head-name if it got left by an old version of git-bisect rm -f "$GIT_DIR/head-name" &&
--
1.7.6.353.gb3ae7e