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https://github.com/git/git
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22b3ddd508
It seems that Cygwin sets the variable SESSIONNAME when an interactive desktop session is running, and does not set it when you log in via ssh. So we can use this variable to determine whether to run gitk or git log in git bisect view. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
668 lines
14 KiB
Bash
Executable file
668 lines
14 KiB
Bash
Executable file
#!/bin/sh
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USAGE='[help|start|bad|good|skip|next|reset|visualize|replay|log|run]'
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LONG_USAGE='git bisect help
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print this long help message.
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git bisect start [<bad> [<good>...]] [--] [<pathspec>...]
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reset bisect state and start bisection.
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git bisect bad [<rev>]
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mark <rev> a known-bad revision.
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git bisect good [<rev>...]
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mark <rev>... known-good revisions.
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git bisect skip [(<rev>|<range>)...]
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mark <rev>... untestable revisions.
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git bisect next
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find next bisection to test and check it out.
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git bisect reset [<branch>]
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finish bisection search and go back to branch.
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git bisect visualize
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show bisect status in gitk.
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git bisect replay <logfile>
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replay bisection log.
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git bisect log
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show bisect log.
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git bisect run <cmd>...
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use <cmd>... to automatically bisect.
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Please use "git help bisect" to get the full man page.'
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OPTIONS_SPEC=
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. git-sh-setup
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require_work_tree
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_x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
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_x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40"
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sq() {
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@@PERL@@ -e '
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for (@ARGV) {
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s/'\''/'\'\\\\\'\''/g;
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print " '\''$_'\''";
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}
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print "\n";
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' "$@"
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}
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bisect_autostart() {
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test -s "$GIT_DIR/BISECT_START" || {
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echo >&2 'You need to start by "git bisect start"'
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if test -t 0
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then
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echo >&2 -n 'Do you want me to do it for you [Y/n]? '
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read yesno
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case "$yesno" in
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[Nn]*)
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exit ;;
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esac
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bisect_start
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else
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exit 1
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fi
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}
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}
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bisect_start() {
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#
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# Verify HEAD.
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#
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head=$(GIT_DIR="$GIT_DIR" git symbolic-ref -q HEAD) ||
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head=$(GIT_DIR="$GIT_DIR" git rev-parse --verify HEAD) ||
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die "Bad HEAD - I need a HEAD"
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#
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# Check if we are bisecting.
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#
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start_head=''
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if test -s "$GIT_DIR/BISECT_START"
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then
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# Reset to the rev from where we started.
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start_head=$(cat "$GIT_DIR/BISECT_START")
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git checkout "$start_head" || exit
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else
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# Get rev from where we start.
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case "$head" in
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refs/heads/*|$_x40)
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# This error message should only be triggered by
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# cogito usage, and cogito users should understand
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# it relates to cg-seek.
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[ -s "$GIT_DIR/head-name" ] &&
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die "won't bisect on seeked tree"
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start_head="${head#refs/heads/}"
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;;
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*)
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die "Bad HEAD - strange symbolic ref"
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;;
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esac
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fi
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#
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# Get rid of any old bisect state.
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#
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bisect_clean_state || exit
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#
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# Check for one bad and then some good revisions.
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#
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has_double_dash=0
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for arg; do
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case "$arg" in --) has_double_dash=1; break ;; esac
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done
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orig_args=$(sq "$@")
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bad_seen=0
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eval=''
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while [ $# -gt 0 ]; do
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arg="$1"
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case "$arg" in
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--)
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shift
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break
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;;
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*)
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rev=$(git rev-parse -q --verify "$arg^{commit}") || {
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test $has_double_dash -eq 1 &&
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die "'$arg' does not appear to be a valid revision"
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break
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}
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case $bad_seen in
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0) state='bad' ; bad_seen=1 ;;
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*) state='good' ;;
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esac
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eval="$eval bisect_write '$state' '$rev' 'nolog'; "
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shift
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;;
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esac
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done
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#
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# Change state.
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# In case of mistaken revs or checkout error, or signals received,
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# "bisect_auto_next" below may exit or misbehave.
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# We have to trap this to be able to clean up using
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# "bisect_clean_state".
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#
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trap 'bisect_clean_state' 0
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trap 'exit 255' 1 2 3 15
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#
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# Write new start state.
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#
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echo "$start_head" >"$GIT_DIR/BISECT_START" &&
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sq "$@" >"$GIT_DIR/BISECT_NAMES" &&
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eval "$eval" &&
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echo "git bisect start$orig_args" >>"$GIT_DIR/BISECT_LOG" || exit
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#
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# Check if we can proceed to the next bisect state.
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#
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bisect_auto_next
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trap '-' 0
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}
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bisect_write() {
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state="$1"
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rev="$2"
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nolog="$3"
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case "$state" in
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bad) tag="$state" ;;
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good|skip) tag="$state"-"$rev" ;;
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*) die "Bad bisect_write argument: $state" ;;
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esac
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git update-ref "refs/bisect/$tag" "$rev" || exit
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echo "# $state: $(git show-branch $rev)" >>"$GIT_DIR/BISECT_LOG"
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test -n "$nolog" || echo "git bisect $state $rev" >>"$GIT_DIR/BISECT_LOG"
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}
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is_expected_rev() {
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test -f "$GIT_DIR/BISECT_EXPECTED_REV" &&
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test "$1" = $(cat "$GIT_DIR/BISECT_EXPECTED_REV")
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}
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mark_expected_rev() {
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echo "$1" > "$GIT_DIR/BISECT_EXPECTED_REV"
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}
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check_expected_revs() {
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for _rev in "$@"; do
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if ! is_expected_rev "$_rev"; then
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rm -f "$GIT_DIR/BISECT_ANCESTORS_OK"
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rm -f "$GIT_DIR/BISECT_EXPECTED_REV"
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return
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fi
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done
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}
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bisect_skip() {
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all=''
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for arg in "$@"
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do
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case "$arg" in
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*..*)
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revs=$(git rev-list "$arg") || die "Bad rev input: $arg" ;;
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*)
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revs=$(sq "$arg") ;;
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esac
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all="$all $revs"
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done
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eval bisect_state 'skip' $all
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}
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bisect_state() {
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bisect_autostart
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state=$1
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case "$#,$state" in
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0,*)
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die "Please call 'bisect_state' with at least one argument." ;;
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1,bad|1,good|1,skip)
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rev=$(git rev-parse --verify HEAD) ||
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die "Bad rev input: HEAD"
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bisect_write "$state" "$rev"
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check_expected_revs "$rev" ;;
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2,bad|*,good|*,skip)
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shift
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eval=''
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for rev in "$@"
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do
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sha=$(git rev-parse --verify "$rev^{commit}") ||
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die "Bad rev input: $rev"
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eval="$eval bisect_write '$state' '$sha'; "
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done
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eval "$eval"
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check_expected_revs "$@" ;;
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*,bad)
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die "'git bisect bad' can take only one argument." ;;
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*)
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usage ;;
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esac
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bisect_auto_next
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}
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bisect_next_check() {
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missing_good= missing_bad=
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git show-ref -q --verify refs/bisect/bad || missing_bad=t
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test -n "$(git for-each-ref "refs/bisect/good-*")" || missing_good=t
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case "$missing_good,$missing_bad,$1" in
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,,*)
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: have both good and bad - ok
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;;
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*,)
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# do not have both but not asked to fail - just report.
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false
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;;
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t,,good)
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# have bad but not good. we could bisect although
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# this is less optimum.
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echo >&2 'Warning: bisecting only with a bad commit.'
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if test -t 0
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then
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printf >&2 'Are you sure [Y/n]? '
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read yesno
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case "$yesno" in [Nn]*) exit 1 ;; esac
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fi
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: bisect without good...
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;;
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*)
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THEN=''
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test -s "$GIT_DIR/BISECT_START" || {
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echo >&2 'You need to start by "git bisect start".'
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THEN='then '
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}
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echo >&2 'You '$THEN'need to give me at least one good' \
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'and one bad revisions.'
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echo >&2 '(You can use "git bisect bad" and' \
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'"git bisect good" for that.)'
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exit 1 ;;
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esac
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}
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bisect_auto_next() {
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bisect_next_check && bisect_next || :
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}
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filter_skipped() {
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_eval="$1"
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_skip="$2"
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if [ -z "$_skip" ]; then
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eval "$_eval"
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return
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fi
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# Let's parse the output of:
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# "git rev-list --bisect-vars --bisect-all ..."
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eval "$_eval" | while read hash line
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do
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case "$VARS,$FOUND,$TRIED,$hash" in
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# We display some vars.
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1,*,*,*) echo "$hash $line" ;;
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# Split line.
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,*,*,---*) ;;
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# We had nothing to search.
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,,,bisect_rev*)
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echo "bisect_rev="
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VARS=1
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;;
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# We did not find a good bisect rev.
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# This should happen only if the "bad"
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# commit is also a "skip" commit.
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,,*,bisect_rev*)
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echo "bisect_rev=$TRIED"
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VARS=1
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;;
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# We are searching.
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,,*,*)
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TRIED="${TRIED:+$TRIED|}$hash"
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case "$_skip" in
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*$hash*) ;;
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*)
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echo "bisect_rev=$hash"
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echo "bisect_tried=\"$TRIED\""
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FOUND=1
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;;
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esac
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;;
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# We have already found a rev to be tested.
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,1,*,bisect_rev*) VARS=1 ;;
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,1,*,*) ;;
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# ???
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*) die "filter_skipped error " \
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"VARS: '$VARS' " \
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"FOUND: '$FOUND' " \
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"TRIED: '$TRIED' " \
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"hash: '$hash' " \
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"line: '$line'"
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;;
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esac
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done
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}
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exit_if_skipped_commits () {
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_tried=$1
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if expr "$_tried" : ".*[|].*" > /dev/null ; then
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echo "There are only 'skip'ped commit left to test."
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echo "The first bad commit could be any of:"
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echo "$_tried" | tr '[|]' '[\012]'
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echo "We cannot bisect more!"
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exit 2
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fi
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}
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bisect_checkout() {
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_rev="$1"
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_msg="$2"
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echo "Bisecting: $_msg"
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mark_expected_rev "$_rev"
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git checkout -q "$_rev" || exit
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git show-branch "$_rev"
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}
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is_among() {
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_rev="$1"
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_list="$2"
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case "$_list" in *$_rev*) return 0 ;; esac
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return 1
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}
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handle_bad_merge_base() {
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_badmb="$1"
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_good="$2"
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if is_expected_rev "$_badmb"; then
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cat >&2 <<EOF
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The merge base $_badmb is bad.
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This means the bug has been fixed between $_badmb and [$_good].
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EOF
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exit 3
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else
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cat >&2 <<EOF
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Some good revs are not ancestor of the bad rev.
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git bisect cannot work properly in this case.
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Maybe you mistake good and bad revs?
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EOF
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exit 1
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fi
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}
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handle_skipped_merge_base() {
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_mb="$1"
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_bad="$2"
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_good="$3"
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cat >&2 <<EOF
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Warning: the merge base between $_bad and [$_good] must be skipped.
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So we cannot be sure the first bad commit is between $_mb and $_bad.
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We continue anyway.
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EOF
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}
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#
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# "check_merge_bases" checks that merge bases are not "bad".
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#
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# - If one is "good", that's good, we have nothing to do.
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# - If one is "bad", it means the user assumed something wrong
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# and we must exit.
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# - If one is "skipped", we can't know but we should warn.
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# - If we don't know, we should check it out and ask the user to test.
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#
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# In the last case we will return 1, and otherwise 0.
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#
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check_merge_bases() {
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_bad="$1"
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_good="$2"
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_skip="$3"
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for _mb in $(git merge-base --all $_bad $_good)
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do
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if is_among "$_mb" "$_good"; then
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continue
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elif test "$_mb" = "$_bad"; then
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handle_bad_merge_base "$_bad" "$_good"
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elif is_among "$_mb" "$_skip"; then
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handle_skipped_merge_base "$_mb" "$_bad" "$_good"
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else
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bisect_checkout "$_mb" "a merge base must be tested"
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return 1
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fi
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done
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return 0
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}
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#
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# "check_good_are_ancestors_of_bad" checks that all "good" revs are
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# ancestor of the "bad" rev.
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#
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# If that's not the case, we need to check the merge bases.
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# If a merge base must be tested by the user we return 1 and
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# otherwise 0.
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#
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check_good_are_ancestors_of_bad() {
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test -f "$GIT_DIR/BISECT_ANCESTORS_OK" &&
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return
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_bad="$1"
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_good=$(echo $2 | sed -e 's/\^//g')
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_skip="$3"
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# Bisecting with no good rev is ok
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test -z "$_good" && return
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_side=$(git rev-list $_good ^$_bad)
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if test -n "$_side"; then
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# Return if a checkout was done
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check_merge_bases "$_bad" "$_good" "$_skip" || return
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fi
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: > "$GIT_DIR/BISECT_ANCESTORS_OK"
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return 0
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}
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bisect_next() {
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case "$#" in 0) ;; *) usage ;; esac
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bisect_autostart
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bisect_next_check good
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# Get bad, good and skipped revs
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bad=$(git rev-parse --verify refs/bisect/bad) &&
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good=$(git for-each-ref --format='^%(objectname)' \
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"refs/bisect/good-*" | tr '\012' ' ') &&
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skip=$(git for-each-ref --format='%(objectname)' \
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"refs/bisect/skip-*" | tr '\012' ' ') || exit
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# Maybe some merge bases must be tested first
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check_good_are_ancestors_of_bad "$bad" "$good" "$skip"
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# Return now if a checkout has already been done
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test "$?" -eq "1" && return
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# Get bisection information
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BISECT_OPT=''
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test -n "$skip" && BISECT_OPT='--bisect-all'
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eval="git rev-list --bisect-vars $BISECT_OPT $good $bad --" &&
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eval="$eval $(cat "$GIT_DIR/BISECT_NAMES")" &&
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eval=$(filter_skipped "$eval" "$skip") &&
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eval "$eval" || exit
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if [ -z "$bisect_rev" ]; then
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echo "$bad was both good and bad"
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exit 1
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fi
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if [ "$bisect_rev" = "$bad" ]; then
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exit_if_skipped_commits "$bisect_tried"
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echo "$bisect_rev is first bad commit"
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git diff-tree --pretty $bisect_rev
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exit 0
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fi
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# We should exit here only if the "bad"
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# commit is also a "skip" commit (see above).
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exit_if_skipped_commits "$bisect_rev"
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bisect_checkout "$bisect_rev" "$bisect_nr revisions left to test after this"
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}
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bisect_visualize() {
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bisect_next_check fail
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if test $# = 0
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then
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case "${DISPLAY+set}${SESSIONNAME+set}${MSYSTEM+set}${SECURITYSESSIONID+set}" in
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'') set git log ;;
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set*) set gitk ;;
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esac
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else
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case "$1" in
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git*|tig) ;;
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-*) set git log "$@" ;;
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*) set git "$@" ;;
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esac
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fi
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not=$(git for-each-ref --format='%(refname)' "refs/bisect/good-*")
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eval '"$@"' refs/bisect/bad --not $not -- $(cat "$GIT_DIR/BISECT_NAMES")
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}
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bisect_reset() {
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test -s "$GIT_DIR/BISECT_START" || {
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echo "We are not bisecting."
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return
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}
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case "$#" in
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0) branch=$(cat "$GIT_DIR/BISECT_START") ;;
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1) git show-ref --verify --quiet -- "refs/heads/$1" ||
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die "$1 does not seem to be a valid branch"
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branch="$1" ;;
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*)
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usage ;;
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|
esac
|
|
git checkout "$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 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 $res
|
|
fi
|
|
|
|
if grep "is first bad commit" "$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
|