bisect: simplify the addition of new bisect terms

[thirdparty/git.git] / git-bisect.sh

diff --git a/git-bisect.sh b/git-bisect.sh
index fcbed2263b7500570891054ebe9af6cfe99f4abf..dcd7e5900eea4180a2f23d69227f771e5e387f02 100755 (executable)
--- a/git-bisect.sh
+++ b/git-bisect.sh
@@ -77,6 +77,7 @@ bisect_start() {
        orig_args=$(git rev-parse --sq-quote "$@")
        bad_seen=0
        eval=''
+       must_write_terms=0
        if test "z$(git rev-parse --is-bare-repository)" != zfalse
        then
                mode=--no-checkout
@@ -101,6 +102,14 @@ bisect_start() {
                                die "$(eval_gettext "'\$arg' does not appear to be a valid revision")"
                                break
                        }
+
+                       # The user ran "git bisect start <sha1>
+                       # <sha1>", hence did not explicitly specify
+                       # the terms, but we are already starting to
+                       # set references named with the default terms,
+                       # and won't be able to change afterwards.
+                       must_write_terms=1
+
                        case $bad_seen in
                        0) state=$TERM_BAD ; bad_seen=1 ;;
                        *) state=$TERM_GOOD ;;
@@ -172,6 +181,10 @@ bisect_start() {
        } &&
        git rev-parse --sq-quote "$@" >"$GIT_DIR/BISECT_NAMES" &&
        eval "$eval true" &&
+       if test $must_write_terms -eq 1
+       then
+               write_terms "$TERM_BAD" "$TERM_GOOD"
+       fi &&
        echo "git bisect start$orig_args" >>"$GIT_DIR/BISECT_LOG" || exit
        #
        # Check if we can proceed to the next bisect state.
@@ -232,6 +245,7 @@ bisect_skip() {
 bisect_state() {
        bisect_autostart
        state=$1
+       check_and_set_terms $state
        case "$#,$state" in
        0,*)
                die "$(gettext "Please call 'bisect_state' with at least one argument.")" ;;
@@ -291,15 +305,17 @@ bisect_next_check() {
                : bisect without $TERM_GOOD...
                ;;
        *)
-
+               bad_syn=$(bisect_voc bad)
+               good_syn=$(bisect_voc good)
                if test -s "$GIT_DIR/BISECT_START"
                then
-                       gettextln "You need to give me at least one good and one bad revision.
-(You can use \"git bisect bad\" and \"git bisect good\" for that.)" >&2
+
+                       eval_gettextln "You need to give me at least one \$bad_syn and one \$good_syn revision.
+(You can use \"git bisect \$bad_syn\" and \"git bisect \$good_syn\" for that.)" >&2
                else
-                       gettextln "You need to start by \"git bisect start\".
-You then need to give me at least one good and one bad revision.
-(You can use \"git bisect bad\" and \"git bisect good\" for that.)" >&2
+                       eval_gettextln "You need to start by \"git bisect start\".
+You then need to give me at least one \$good_syn and one \$bad_syn revision.
+(You can use \"git bisect \$bad_syn\" and \"git bisect \$good_syn\" for that.)" >&2
                fi
                exit 1 ;;
        esac
@@ -402,6 +418,7 @@ bisect_clean_state() {
        rm -f "$GIT_DIR/BISECT_LOG" &&
        rm -f "$GIT_DIR/BISECT_NAMES" &&
        rm -f "$GIT_DIR/BISECT_RUN" &&
+       rm -f "$GIT_DIR/BISECT_TERMS" &&
        # Cleanup head-name if it got left by an old version of git-bisect
        rm -f "$GIT_DIR/head-name" &&
        git update-ref -d --no-deref BISECT_HEAD &&
@@ -422,11 +439,13 @@ bisect_replay () {
                        rev="$command"
                        command="$bisect"
                fi
+               get_terms
+               check_and_set_terms "$command"
                case "$command" in
                start)
                        cmd="bisect_start $rev"
                        eval "$cmd" ;;
-               $TERM_GOOD|$TERM_BAD|skip)
+               "$TERM_GOOD"|"$TERM_BAD"|skip)
                        bisect_write "$command" "$rev" ;;
                *)
                        die "$(gettext "?? what are you talking about?")" ;;
@@ -499,18 +518,62 @@ bisect_log () {
        cat "$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=$2
+       printf '%s\n%s\n' "$TERM_BAD" "$TERM_GOOD" >"$GIT_DIR/BISECT_TERMS"
+}
+
+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
+                       ;;
+               esac ;;
+       esac
+}
+
+bisect_voc () {
+       case "$1" in
+       bad) echo "bad" ;;
+       good) echo "good" ;;
+       esac
+}
+
 case "$#" in
 0)
        usage ;;
 *)
        cmd="$1"
+       get_terms
        shift
        case "$cmd" in
        help)
                git bisect -h ;;
        start)
                bisect_start "$@" ;;
-       bad|good)
+       bad|good|"$TERM_BAD"|"$TERM_GOOD")
                bisect_state "$cmd" "$@" ;;
        skip)
                bisect_skip "$@" ;;