git-tar-tree: no more void pointer arithmetic

[git.git] / git-bisect.sh

diff --git a/git-bisect.sh b/git-bisect.sh
index 68838f3..03df143 100755 (executable)
--- a/git-bisect.sh
+++ b/git-bisect.sh
@@ -1,4 +1,15 @@
 #!/bin/sh
+
+USAGE='[start|bad|good|next|reset|visualize]'
+LONG_USAGE='git bisect start [<pathspec>]      reset bisect state and start bisection.
+git bisect bad [<rev>]         mark <rev> a known-bad revision.
+git bisect good [<rev>...]     mark <rev>... known-good revisions.
+git bisect next                        find next bisection to test and check it out.
+git bisect reset [<branch>]    finish bisection search and go back to branch.
+git bisect visualize            show bisect status in gitk.
+git bisect replay <logfile>    replay bisection log
+git bisect log                 show bisect log.'
+
 . git-sh-setup
 
 sq() {
@@ -11,19 +22,6 @@ sq() {
        ' "$@"
 }
 
-usage() {
-    echo >&2 'usage: git bisect [start|bad|good|next|reset|visualize]
-git bisect start [<pathspec>]  reset bisect state and start bisection.
-git bisect bad [<rev>]         mark <rev> a known-bad revision.
-git bisect good [<rev>...]     mark <rev>... known-good revisions.
-git bisect next                        find next bisection to test and check it out.
-git bisect reset [<branch>]    finish bisection search and go back to branch.
-git bisect visualize            show bisect status in gitk.
-git bisect replay <logfile>    replay bisection log
-git bisect log                 show bisect log.'
-    exit 1
-}
-
 bisect_autostart() {
        test -d "$GIT_DIR/refs/bisect" || {
                echo >&2 'You need to start by "git bisect start"'
@@ -51,9 +49,16 @@ bisect_start() {
        die "Bad HEAD - I need a symbolic ref"
        case "$head" in
        refs/heads/bisect*)
-               git checkout master || exit
+               if [ -s "$GIT_DIR/head-name" ]; then
+                   branch=`cat "$GIT_DIR/head-name"`
+               else
+                   branch=master
+               fi
+               git checkout $branch || exit
                ;;
        refs/heads/*)
+               [ -s "$GIT_DIR/head-name" ] && die "won't bisect on seeked tree"
+               echo "$head" | sed 's#^refs/heads/##' >"$GIT_DIR/head-name"
                ;;
        *)
                die "Bad HEAD - strange symbolic ref"
@@ -67,7 +72,7 @@ bisect_start() {
        rm -rf "$GIT_DIR/refs/bisect/"
        mkdir "$GIT_DIR/refs/bisect"
        {
-           echo -n "git-bisect start"
+           printf "git-bisect start"
            sq "$@"
        } >"$GIT_DIR/BISECT_LOG"
        sq "$@" >"$GIT_DIR/BISECT_NAMES"
@@ -161,7 +166,11 @@ bisect_visualize() {
 
 bisect_reset() {
        case "$#" in
-       0) branch=master ;;
+       0) if [ -s "$GIT_DIR/head-name" ]; then
+              branch=`cat "$GIT_DIR/head-name"`
+          else
+              branch=master
+          fi ;;
        1) test -f "$GIT_DIR/refs/heads/$1" || {
               echo >&2 "$1 does not seem to be a valid branch"
               exit 1
@@ -172,8 +181,9 @@ bisect_reset() {
        esac
        git checkout "$branch" &&
        rm -fr "$GIT_DIR/refs/bisect"
-       rm -f "$GIT_DIR/refs/heads/bisect"
+       rm -f "$GIT_DIR/refs/heads/bisect" "$GIT_DIR/head-name"
        rm -f "$GIT_DIR/BISECT_LOG"
+       rm -f "$GIT_DIR/BISECT_NAMES"
 }
 
 bisect_replay () {