mirror of
https://github.com/git/git.git
synced 2024-11-24 18:33:43 +08:00
06e6a74506
This allows a natural user-interface when looking for any change in the code, not just regression. For example: git bisect start --term-old fast --term-new slow git bisect fast git bisect slow ... There were several proposed user-interfaces for this feature. This patch implements it as options to 'git bisect start' for the following reasons: * By construction, the terms will be valid for one and only one bisection. * Unlike positional arguments, using named options avoid having to remember an order. * We can combine user-defined terms and passing old/new commits as argument to "git bisect start". * The implementation is relatively simple. See previous discussions: http://mid.gmane.org/1435337896-20709-3-git-send-email-Matthieu.Moy@imag.fr Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr> Signed-off-by: Junio C Hamano <gitster@pobox.com>
698 lines
16 KiB
Bash
Executable File
698 lines
16 KiB
Bash
Executable File
#!/bin/sh
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USAGE='[help|start|bad|good|new|old|terms|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 [--term-{old,good}=<term> --term-{new,bad}=<term>]
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[--no-checkout] [<bad> [<good>...]] [--] [<pathspec>...]
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reset bisect state and start bisection.
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git bisect (bad|new) [<rev>]
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mark <rev> a known-bad revision/
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a revision after change in a given property.
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git bisect (good|old) [<rev>...]
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mark <rev>... known-good revisions/
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revisions before change in a given property.
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git bisect terms [--term-good | --term-bad]
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show the terms used for old and new commits (default: bad, good)
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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 [<commit>]
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finish bisection search and go back to commit.
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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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. git-sh-i18n
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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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TERM_BAD=bad
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TERM_GOOD=good
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bisect_head()
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{
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if test -f "$GIT_DIR/BISECT_HEAD"
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then
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echo BISECT_HEAD
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else
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echo HEAD
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fi
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}
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bisect_autostart() {
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test -s "$GIT_DIR/BISECT_START" || {
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gettextln "You need to start by \"git bisect start\"" >&2
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if test -t 0
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then
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# TRANSLATORS: Make sure to include [Y] and [n] in your
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# translation. The program will only accept English input
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# at this point.
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gettext "Do you want me to do it for you [Y/n]? " >&2
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read yesno
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case "$yesno" in
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[Nn]*)
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exit ;;
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esac
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bisect_start
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else
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exit 1
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fi
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}
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}
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bisect_start() {
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#
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# Check for one bad and then some good revisions.
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#
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has_double_dash=0
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for arg; do
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case "$arg" in --) has_double_dash=1; break ;; esac
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done
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orig_args=$(git rev-parse --sq-quote "$@")
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bad_seen=0
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eval=''
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must_write_terms=0
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revs=''
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if test "z$(git rev-parse --is-bare-repository)" != zfalse
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then
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mode=--no-checkout
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else
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mode=''
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fi
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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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--no-checkout)
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mode=--no-checkout
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shift ;;
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--term-good|--term-old)
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shift
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must_write_terms=1
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TERM_GOOD=$1
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shift ;;
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--term-good=*|--term-old=*)
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must_write_terms=1
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TERM_GOOD=${1#*=}
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shift ;;
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--term-bad|--term-new)
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shift
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must_write_terms=1
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TERM_BAD=$1
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shift ;;
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--term-bad=*|--term-new=*)
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must_write_terms=1
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TERM_BAD=${1#*=}
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shift ;;
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--*)
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die "$(eval_gettext "unrecognised option: '\$arg'")" ;;
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*)
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rev=$(git rev-parse -q --verify "$arg^{commit}") || {
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test $has_double_dash -eq 1 &&
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die "$(eval_gettext "'\$arg' does not appear to be a valid revision")"
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break
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}
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revs="$revs $rev"
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shift
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;;
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esac
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done
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for rev in $revs
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do
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# The user ran "git bisect start <sha1>
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# <sha1>", hence did not explicitly specify
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# the terms, but we are already starting to
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# set references named with the default terms,
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# and won't be able to change afterwards.
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must_write_terms=1
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case $bad_seen in
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0) state=$TERM_BAD ; bad_seen=1 ;;
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*) state=$TERM_GOOD ;;
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esac
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eval="$eval bisect_write '$state' '$rev' 'nolog' &&"
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done
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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 "$(gettext "Bad HEAD - I need a HEAD")"
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#
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# Check if we are bisecting.
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#
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start_head=''
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if test -s "$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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if test "z$mode" != "z--no-checkout"
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then
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git checkout "$start_head" -- ||
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die "$(eval_gettext "Checking out '\$start_head' failed. Try 'git bisect reset <valid-branch>'.")"
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fi
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else
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# Get rev from where we start.
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case "$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 "$(gettext "won't bisect on cg-seek'ed tree")"
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start_head="${head#refs/heads/}"
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;;
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*)
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die "$(gettext "Bad HEAD - strange symbolic ref")"
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;;
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esac
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fi
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#
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# Get rid of any old bisect state.
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#
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bisect_clean_state || exit
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#
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# Change state.
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# In case of mistaken revs or checkout error, or signals received,
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# "bisect_auto_next" below may exit or misbehave.
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# We have to trap this to be able to clean up using
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# "bisect_clean_state".
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#
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trap 'bisect_clean_state' 0
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trap 'exit 255' 1 2 3 15
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#
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# Write new start state.
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#
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echo "$start_head" >"$GIT_DIR/BISECT_START" && {
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test "z$mode" != "z--no-checkout" ||
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git update-ref --no-deref BISECT_HEAD "$start_head"
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} &&
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git rev-parse --sq-quote "$@" >"$GIT_DIR/BISECT_NAMES" &&
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eval "$eval true" &&
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if test $must_write_terms -eq 1
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then
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write_terms "$TERM_BAD" "$TERM_GOOD"
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fi &&
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echo "git bisect start$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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"$TERM_BAD")
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tag="$state" ;;
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"$TERM_GOOD"|skip)
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tag="$state"-"$rev" ;;
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*)
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die "$(eval_gettext "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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check_expected_revs() {
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for _rev in "$@"; do
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if ! is_expected_rev "$_rev"
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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 "$(eval_gettext "Bad rev input: \$arg")" ;;
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*)
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revs=$(git rev-parse --sq-quote "$arg") ;;
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esac
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all="$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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check_and_set_terms $state
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case "$#,$state" in
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0,*)
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die "$(gettext "Please call 'bisect_state' with at least one argument.")" ;;
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1,"$TERM_BAD"|1,"$TERM_GOOD"|1,skip)
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rev=$(git rev-parse --verify $(bisect_head)) ||
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die "$(gettext "Bad rev input: $(bisect_head)")"
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bisect_write "$state" "$rev"
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check_expected_revs "$rev" ;;
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2,"$TERM_BAD"|*,"$TERM_GOOD"|*,skip)
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shift
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hash_list=''
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for rev in "$@"
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do
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sha=$(git rev-parse --verify "$rev^{commit}") ||
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die "$(eval_gettext "Bad rev input: \$rev")"
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hash_list="$hash_list $sha"
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done
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for rev in $hash_list
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do
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bisect_write "$state" "$rev"
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done
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check_expected_revs $hash_list ;;
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*,"$TERM_BAD")
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die "$(eval_gettext "'git bisect \$TERM_BAD' can take only one argument.")" ;;
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*)
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usage ;;
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esac
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bisect_auto_next
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}
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bisect_next_check() {
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missing_good= missing_bad=
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git show-ref -q --verify refs/bisect/$TERM_BAD || missing_bad=t
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test -n "$(git for-each-ref "refs/bisect/$TERM_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 $TERM_GOOD and $TERM_BAD - ok
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;;
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*,)
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# do not have both but not asked to fail - just report.
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false
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;;
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t,,"$TERM_GOOD")
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# have bad (or new) but not good (or old). we could bisect although
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# this is less optimum.
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eval_gettextln "Warning: bisecting only with a \$TERM_BAD commit." >&2
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if test -t 0
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then
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# TRANSLATORS: Make sure to include [Y] and [n] in your
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# translation. The program will only accept English input
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# at this point.
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gettext "Are you sure [Y/n]? " >&2
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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 $TERM_GOOD...
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;;
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*)
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bad_syn=$(bisect_voc bad)
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good_syn=$(bisect_voc good)
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if test -s "$GIT_DIR/BISECT_START"
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then
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eval_gettextln "You need to give me at least one \$bad_syn and one \$good_syn revision.
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(You can use \"git bisect \$bad_syn\" and \"git bisect \$good_syn\" for that.)" >&2
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else
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eval_gettextln "You need to start by \"git bisect start\".
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You then need to give me at least one \$good_syn and one \$bad_syn revision.
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(You can use \"git bisect \$bad_syn\" and \"git bisect \$good_syn\" for that.)" >&2
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fi
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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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bisect_next() {
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case "$#" in 0) ;; *) usage ;; esac
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bisect_autostart
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bisect_next_check $TERM_GOOD
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# Perform all bisection computation, display and checkout
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git bisect--helper --next-all $(test -f "$GIT_DIR/BISECT_HEAD" && echo --no-checkout)
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res=$?
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# Check if we should exit because bisection is finished
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if test $res -eq 10
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then
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bad_rev=$(git show-ref --hash --verify refs/bisect/$TERM_BAD)
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bad_commit=$(git show-branch $bad_rev)
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echo "# first $TERM_BAD commit: $bad_commit" >>"$GIT_DIR/BISECT_LOG"
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exit 0
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elif test $res -eq 2
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then
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echo "# only skipped commits left to test" >>"$GIT_DIR/BISECT_LOG"
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good_revs=$(git for-each-ref --format="%(objectname)" "refs/bisect/$TERM_GOOD-*")
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for skipped in $(git rev-list refs/bisect/$TERM_BAD --not $good_revs)
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do
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skipped_commit=$(git show-branch $skipped)
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echo "# possible first $TERM_BAD commit: $skipped_commit" >>"$GIT_DIR/BISECT_LOG"
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done
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exit $res
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fi
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# Check for an error in the bisection process
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test $res -ne 0 && exit $res
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return 0
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}
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bisect_visualize() {
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bisect_next_check fail
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if test $# = 0
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then
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if test -n "${DISPLAY+set}${SESSIONNAME+set}${MSYSTEM+set}${SECURITYSESSIONID+set}" &&
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type gitk >/dev/null 2>&1
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then
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set gitk
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else
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set git log
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fi
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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 "$@" ;;
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esac
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fi
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eval '"$@"' --bisect -- $(cat "$GIT_DIR/BISECT_NAMES")
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}
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bisect_reset() {
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test -s "$GIT_DIR/BISECT_START" || {
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gettextln "We are not bisecting."
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return
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}
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case "$#" in
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0) branch=$(cat "$GIT_DIR/BISECT_START") ;;
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1) git rev-parse --quiet --verify "$1^{commit}" >/dev/null || {
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invalid="$1"
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die "$(eval_gettext "'\$invalid' is not a valid commit")"
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}
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branch="$1" ;;
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*)
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usage ;;
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esac
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if ! test -f "$GIT_DIR/BISECT_HEAD" && ! git checkout "$branch" --
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then
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die "$(eval_gettext "Could not check out original HEAD '\$branch'.
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Try 'git bisect reset <commit>'.")"
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fi
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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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rm -f "$GIT_DIR/BISECT_TERMS" &&
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# Cleanup head-name if it got left by an old version of git-bisect
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rm -f "$GIT_DIR/head-name" &&
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git update-ref -d --no-deref BISECT_HEAD &&
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# clean up BISECT_START last
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rm -f "$GIT_DIR/BISECT_START"
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}
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bisect_replay () {
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file="$1"
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test "$#" -eq 1 || die "$(gettext "No logfile given")"
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test -r "$file" || die "$(eval_gettext "cannot read \$file for replaying")"
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bisect_reset
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while read git bisect command rev
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do
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test "$git $bisect" = "git bisect" || test "$git" = "git-bisect" || continue
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if test "$git" = "git-bisect"
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then
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rev="$command"
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command="$bisect"
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fi
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get_terms
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check_and_set_terms "$command"
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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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"$TERM_GOOD"|"$TERM_BAD"|skip)
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bisect_write "$command" "$rev" ;;
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terms)
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bisect_terms $rev ;;
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*)
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die "$(gettext "?? what are you talking about?")" ;;
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esac
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done <"$file"
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bisect_auto_next
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}
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bisect_run () {
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bisect_next_check fail
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while true
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do
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command="$@"
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eval_gettextln "running \$command"
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"$@"
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res=$?
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# Check for really bad run error.
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if [ $res -lt 0 -o $res -ge 128 ]
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then
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eval_gettextln "bisect run failed:
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exit code \$res from '\$command' is < 0 or >= 128" >&2
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exit $res
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|
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 [ $res -gt 0 ]
|
|
then
|
|
state="$TERM_BAD"
|
|
else
|
|
state="$TERM_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 sane_grep "first $TERM_BAD commit could be any of" "$GIT_DIR/BISECT_RUN" \
|
|
>/dev/null
|
|
then
|
|
gettextln "bisect run cannot continue any more" >&2
|
|
exit $res
|
|
fi
|
|
|
|
if [ $res -ne 0 ]
|
|
then
|
|
eval_gettextln "bisect run failed:
|
|
'bisect_state \$state' exited with error code \$res" >&2
|
|
exit $res
|
|
fi
|
|
|
|
if sane_grep "is the first $TERM_BAD commit" "$GIT_DIR/BISECT_RUN" >/dev/null
|
|
then
|
|
gettextln "bisect run success"
|
|
exit 0;
|
|
fi
|
|
|
|
done
|
|
}
|
|
|
|
bisect_log () {
|
|
test -s "$GIT_DIR/BISECT_LOG" || die "$(gettext "We are not bisecting.")"
|
|
cat "$GIT_DIR/BISECT_LOG"
|
|
}
|
|
|
|
get_terms () {
|
|
if test -s "$GIT_DIR/BISECT_TERMS"
|
|
then
|
|
{
|
|
read TERM_BAD
|
|
read TERM_GOOD
|
|
} <"$GIT_DIR/BISECT_TERMS"
|
|
fi
|
|
}
|
|
|
|
write_terms () {
|
|
TERM_BAD=$1
|
|
TERM_GOOD=$2
|
|
if test "$TERM_BAD" = "$TERM_GOOD"
|
|
then
|
|
die "$(gettext "please use two different terms")"
|
|
fi
|
|
check_term_format "$TERM_BAD" bad
|
|
check_term_format "$TERM_GOOD" good
|
|
printf '%s\n%s\n' "$TERM_BAD" "$TERM_GOOD" >"$GIT_DIR/BISECT_TERMS"
|
|
}
|
|
|
|
check_term_format () {
|
|
term=$1
|
|
git check-ref-format refs/bisect/"$term" ||
|
|
die "$(eval_gettext "'\$term' is not a valid term")"
|
|
case "$term" in
|
|
help|start|terms|skip|next|reset|visualize|replay|log|run)
|
|
die "$(eval_gettext "can't use the builtin command '\$term' as a term")"
|
|
;;
|
|
bad|new)
|
|
if test "$2" != bad
|
|
then
|
|
# In theory, nothing prevents swapping
|
|
# completely good and bad, but this situation
|
|
# could be confusing and hasn't been tested
|
|
# enough. Forbid it for now.
|
|
die "$(eval_gettext "can't change the meaning of term '\$term'")"
|
|
fi
|
|
;;
|
|
good|old)
|
|
if test "$2" != good
|
|
then
|
|
die "$(eval_gettext "can't change the meaning of term '\$term'")"
|
|
fi
|
|
;;
|
|
esac
|
|
}
|
|
|
|
check_and_set_terms () {
|
|
cmd="$1"
|
|
case "$cmd" in
|
|
skip|start|terms) ;;
|
|
*)
|
|
if test -s "$GIT_DIR/BISECT_TERMS" && test "$cmd" != "$TERM_BAD" && test "$cmd" != "$TERM_GOOD"
|
|
then
|
|
die "$(eval_gettext "Invalid command: you're currently in a \$TERM_BAD/\$TERM_GOOD bisect.")"
|
|
fi
|
|
case "$cmd" in
|
|
bad|good)
|
|
if ! test -s "$GIT_DIR/BISECT_TERMS"
|
|
then
|
|
write_terms bad good
|
|
fi
|
|
;;
|
|
new|old)
|
|
if ! test -s "$GIT_DIR/BISECT_TERMS"
|
|
then
|
|
write_terms new old
|
|
fi
|
|
;;
|
|
esac ;;
|
|
esac
|
|
}
|
|
|
|
bisect_voc () {
|
|
case "$1" in
|
|
bad) echo "bad|new" ;;
|
|
good) echo "good|old" ;;
|
|
esac
|
|
}
|
|
|
|
bisect_terms () {
|
|
get_terms
|
|
if ! test -s "$GIT_DIR/BISECT_TERMS"
|
|
then
|
|
die "$(gettext "no terms defined")"
|
|
fi
|
|
case "$#" in
|
|
0)
|
|
gettextln "Your current terms are $TERM_GOOD for the old state
|
|
and $TERM_BAD for the new state."
|
|
;;
|
|
1)
|
|
arg=$1
|
|
case "$arg" in
|
|
--term-good|--term-old)
|
|
printf '%s\n' "$TERM_GOOD"
|
|
;;
|
|
--term-bad|--term-new)
|
|
printf '%s\n' "$TERM_BAD"
|
|
;;
|
|
*)
|
|
die "$(eval_gettext "invalid argument \$arg for 'git bisect terms'.
|
|
Supported options are: --term-good|--term-old and --term-bad|--term-new.")"
|
|
;;
|
|
esac
|
|
;;
|
|
*)
|
|
usage ;;
|
|
esac
|
|
}
|
|
|
|
case "$#" in
|
|
0)
|
|
usage ;;
|
|
*)
|
|
cmd="$1"
|
|
get_terms
|
|
shift
|
|
case "$cmd" in
|
|
help)
|
|
git bisect -h ;;
|
|
start)
|
|
bisect_start "$@" ;;
|
|
bad|good|new|old|"$TERM_BAD"|"$TERM_GOOD")
|
|
bisect_state "$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)
|
|
bisect_log ;;
|
|
run)
|
|
bisect_run "$@" ;;
|
|
terms)
|
|
bisect_terms "$@" ;;
|
|
*)
|
|
usage ;;
|
|
esac
|
|
esac
|