mirror of
https://github.com/git/git
synced 2024-08-27 19:49:21 +00:00
![Junio C Hamano](/assets/img/avatar_default.png)
* cc/bisect-filter: (21 commits) rev-list: add "int bisect_show_flags" in "struct rev_list_info" rev-list: remove last static vars used in "show_commit" list-objects: add "void *data" parameter to show functions bisect--helper: string output variables together with "&&" rev-list: pass "int flags" as last argument of "show_bisect_vars" t6030: test bisecting with paths bisect: use "bisect--helper" and remove "filter_skipped" function bisect: implement "read_bisect_paths" to read paths in "$GIT_DIR/BISECT_NAMES" bisect--helper: implement "git bisect--helper" bisect: use the new generic "sha1_pos" function to lookup sha1 rev-list: call new "filter_skip" function patch-ids: use the new generic "sha1_pos" function to lookup sha1 sha1-lookup: add new "sha1_pos" function to efficiently lookup sha1 rev-list: pass "revs" to "show_bisect_vars" rev-list: make "show_bisect_vars" non static rev-list: move code to show bisect vars into its own function rev-list: move bisect related code into its own file rev-list: make "bisect_list" variable local to "cmd_rev_list" refs: add "for_each_ref_in" function to refactor "for_each_*_ref" functions quote: add "sq_dequote_to_argv" to put unwrapped args in an argv array ...
603 lines
13 KiB
Bash
Executable file
603 lines
13 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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exit_if_skipped_commits () {
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_tried=$1
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_bad=$2
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if test -n "$_tried" ; 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 "$_tried" | tr '[|]' '[\012]'
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test -n "$_bad" && echo "$_bad"
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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 "$?" -eq "1" && return
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# Get bisection information
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eval=$(eval "git bisect--helper --next-vars") &&
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eval "$eval" || exit
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if [ -z "$bisect_rev" ]; then
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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 "$bisect_tried"
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echo "$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 "$bisect_tried" "$bad"
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echo "$bisect_rev is first bad commit"
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git diff-tree --pretty $bisect_rev
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exit 0
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fi
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bisect_checkout "$bisect_rev" "$bisect_nr revisions left to test after this (roughly $bisect_steps steps)"
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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="$1" ;;
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*)
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usage ;;
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esac
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git checkout "$branch" -- && bisect_clean_state
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}
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bisect_clean_state() {
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# There may be some refs packed during bisection.
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git for-each-ref --format='%(refname) %(objectname)' refs/bisect/\* |
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while read ref hash
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do
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git update-ref -d $ref $hash || exit
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done
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rm -f "$GIT_DIR/BISECT_EXPECTED_REV" &&
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rm -f "$GIT_DIR/BISECT_ANCESTORS_OK" &&
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rm -f "$GIT_DIR/BISECT_LOG" &&
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rm -f "$GIT_DIR/BISECT_NAMES" &&
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rm -f "$GIT_DIR/BISECT_RUN" &&
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# Cleanup head-name if it got left by an old version of git-bisect
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rm -f "$GIT_DIR/head-name" &&
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rm -f "$GIT_DIR/BISECT_START"
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}
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bisect_replay () {
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test -r "$1" || die "cannot read $1 for replaying"
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bisect_reset
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while read git bisect command rev
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do
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test "$git $bisect" = "git bisect" -o "$git" = "git-bisect" || continue
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if test "$git" = "git-bisect"; then
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rev="$command"
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command="$bisect"
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fi
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case "$command" in
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start)
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cmd="bisect_start $rev"
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eval "$cmd" ;;
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|
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
|