diff options
Diffstat (limited to 'git-bisect.sh')
| -rwxr-xr-x | git-bisect.sh | 133 |
1 files changed, 75 insertions, 58 deletions
diff --git a/git-bisect.sh b/git-bisect.sh index b1800edaf7..991b2ef37e 100755 --- a/git-bisect.sh +++ b/git-bisect.sh @@ -1,7 +1,9 @@ #!/bin/sh -USAGE='[start|bad|good|skip|next|reset|visualize|replay|log|run]' -LONG_USAGE='git bisect start [<bad> [<good>...]] [--] [<pathspec>...] +USAGE='[help|start|bad|good|skip|next|reset|visualize|replay|log|run]' +LONG_USAGE='git bisect help + print this long help message. +git bisect start [<bad> [<good>...]] [--] [<pathspec>...] reset bisect state and start bisection. git bisect bad [<rev>] mark <rev> a known-bad revision. @@ -20,7 +22,9 @@ git bisect replay <logfile> git bisect log show bisect log. git bisect run <cmd>... - use <cmd>... to automatically bisect.' + use <cmd>... to automatically bisect. + +Please use "git help bisect" to get the full man page.' OPTIONS_SPEC= . git-sh-setup @@ -40,7 +44,7 @@ sq() { } bisect_autostart() { - test -f "$GIT_DIR/BISECT_NAMES" || { + test -s "$GIT_DIR/BISECT_START" || { echo >&2 'You need to start by "git bisect start"' if test -t 0 then @@ -59,42 +63,42 @@ bisect_autostart() { bisect_start() { # - # Verify HEAD. If we were bisecting before this, reset to the - # top-of-line master first! + # Verify HEAD. # head=$(GIT_DIR="$GIT_DIR" git symbolic-ref -q HEAD) || head=$(GIT_DIR="$GIT_DIR" git rev-parse --verify HEAD) || die "Bad HEAD - I need a HEAD" + # - # Check that we either already have BISECT_START, or that the - # branches bisect, new-bisect don't exist, to not override them. + # Check if we are bisecting. # - test -s "$GIT_DIR/BISECT_START" || - if git show-ref --verify -q refs/heads/bisect || - git show-ref --verify -q refs/heads/new-bisect; then - die 'The branches "bisect" and "new-bisect" must not exist.' - fi start_head='' - case "$head" in - refs/heads/bisect) - branch=`cat "$GIT_DIR/BISECT_START"` - git checkout $branch || exit - ;; - refs/heads/*|$_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 + 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 + # Get rid of any old bisect state. # - bisect_clean_state + bisect_clean_state || exit # # Check for one bad and then some good revisions. @@ -114,7 +118,7 @@ bisect_start() { break ;; *) - rev=$(git rev-parse --verify "$arg^{commit}" 2>/dev/null) || { + rev=$(git rev-parse -q --verify "$arg^{commit}") || { test $has_double_dash -eq 1 && die "'$arg' does not appear to be a valid revision" break @@ -129,11 +133,29 @@ bisect_start() { esac done - sq "$@" >"$GIT_DIR/BISECT_NAMES" - test -n "$start_head" && echo "$start_head" >"$GIT_DIR/BISECT_START" - eval "$eval" - echo "git-bisect start$orig_args" >>"$GIT_DIR/BISECT_LOG" + # + # Change state. + # In case of mistaken revs or checkout error, or signals received, + # "bisect_auto_next" below may exit or misbehave. + # We have to trap this to be able to clean up using + # "bisect_clean_state". + # + trap 'bisect_clean_state' 0 + trap 'exit 255' 1 2 3 15 + + # + # Write new start state. + # + echo "$start_head" >"$GIT_DIR/BISECT_START" && + sq "$@" >"$GIT_DIR/BISECT_NAMES" && + eval "$eval" && + echo "git-bisect start$orig_args" >>"$GIT_DIR/BISECT_LOG" || exit + # + # Check if we can proceed to the next bisect state. + # bisect_auto_next + + trap '-' 0 } bisect_write() { @@ -145,9 +167,9 @@ bisect_write() { good|skip) tag="$state"-"$rev" ;; *) die "Bad bisect_write argument: $state" ;; esac - git update-ref "refs/bisect/$tag" "$rev" + git update-ref "refs/bisect/$tag" "$rev" || exit echo "# $state: $(git show-branch $rev)" >>"$GIT_DIR/BISECT_LOG" - test -z "$nolog" && echo "git-bisect $state $rev" >>"$GIT_DIR/BISECT_LOG" + test -n "$nolog" || echo "git-bisect $state $rev" >>"$GIT_DIR/BISECT_LOG" } bisect_state() { @@ -204,7 +226,7 @@ bisect_next_check() { ;; *) THEN='' - test -f "$GIT_DIR/BISECT_NAMES" || { + test -s "$GIT_DIR/BISECT_START" || { echo >&2 'You need to start by "git bisect start".' THEN='then ' } @@ -344,9 +366,7 @@ bisect_next() { exit_if_skipped_commits "$bisect_rev" echo "Bisecting: $bisect_nr revisions left to test after this" - git branch -D new-bisect 2> /dev/null - git checkout -q -b new-bisect "$bisect_rev" || exit - git branch -M new-bisect bisect + git checkout -q "$bisect_rev" || exit git show-branch "$bisect_rev" } @@ -372,40 +392,35 @@ bisect_visualize() { } bisect_reset() { - test -f "$GIT_DIR/BISECT_NAMES" || { + test -s "$GIT_DIR/BISECT_START" || { echo "We are not bisecting." return } case "$#" in - 0) if [ -s "$GIT_DIR/BISECT_START" ]; then - branch=`cat "$GIT_DIR/BISECT_START"` - else - branch=master - fi ;; + 0) branch=$(cat "$GIT_DIR/BISECT_START") ;; 1) git show-ref --verify --quiet -- "refs/heads/$1" || die "$1 does not seem to be a valid branch" branch="$1" ;; *) usage ;; esac - if git checkout "$branch"; then - # 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_clean_state - fi + git checkout "$branch" && bisect_clean_state } bisect_clean_state() { # There may be some refs packed during bisection. - git for-each-ref --format='%(refname) %(objectname)' refs/bisect/\* refs/heads/bisect | + git for-each-ref --format='%(refname) %(objectname)' refs/bisect/\* | while read ref hash do - git update-ref -d $ref $hash + git update-ref -d $ref $hash || exit done - rm -f "$GIT_DIR/BISECT_LOG" - rm -f "$GIT_DIR/BISECT_NAMES" - rm -f "$GIT_DIR/BISECT_RUN" + rm -f "$GIT_DIR/BISECT_LOG" && + rm -f "$GIT_DIR/BISECT_NAMES" && + rm -f "$GIT_DIR/BISECT_RUN" && + # Cleanup head-name if it got left by an old version of git-bisect + rm -f "$GIT_DIR/head-name" && + + rm -f "$GIT_DIR/BISECT_START" } bisect_replay () { @@ -487,6 +502,8 @@ case "$#" in cmd="$1" shift case "$cmd" in + help) + git bisect -h ;; start) bisect_start "$@" ;; bad|good|skip) |