bisect: limit the searchspace by pathspecs

diff --git a/git-branch.sh b/git-branch.sh
index 074229c206d01b8ca097b4ced902e9bf40987a06..4cd5da16f74cee6e277d33bce74242496eca94fe 100755 (executable)
--- a/git-branch.sh
+++ b/git-branch.sh
@@ -1,9 +1,9 @@
 #!/bin/sh
 
-. git-sh-setup || die "Not a git archive"
+. git-sh-setup
 
 usage () {
-    echo >&2 "usage: $(basename $0)"' [-d <branch>] | [<branch> [start-point]]
+    echo >&2 "usage: $(basename $0)"' [-d <branch>] | [[-f] <branch> [start-point]]
 
 If no arguments, show available branches and mark current branch with a star.
 If one argument, create a new branch <branchname> based off of current HEAD.
@@ -12,49 +12,58 @@ If two arguments, create a new branch <branchname> based off of <start-point>.
     exit 1
 }
 
+headref=$(GIT_DIR="$GIT_DIR" git-symbolic-ref HEAD |
+       sed -e 's|^refs/heads/||')
+
 delete_branch () {
-    option="$1" branch_name="$2"
-    headref=$(GIT_DIR="$GIT_DIR" git-symbolic-ref HEAD |
-              sed -e 's|^refs/heads/||')
-    case ",$headref," in
-    ",$branch_name,")
-       die "Cannot delete the branch you are on." ;;
-    ,,)
-       die "What branch are you on anyway?" ;;
-    esac
-    branch=$(cat "$GIT_DIR/refs/heads/$branch_name") &&
-       branch=$(git-rev-parse --verify "$branch^0") ||
-           die "Seriously, what branch are you talking about?"
-    case "$option" in
-    -D)
-       ;;
-    *)
-       mbs=$(git-merge-base -a "$branch" HEAD | tr '\012' ' ')
-       case " $mbs " in
-       *' '$branch' '*)
-           # the merge base of branch and HEAD contains branch --
-           # which means that the HEAD contains everything in the HEAD.
+    option="$1"
+    shift
+    for branch_name
+    do
+       case ",$headref," in
+       ",$branch_name,")
+           die "Cannot delete the branch you are on." ;;
+       ,,)
+           die "What branch are you on anyway?" ;;
+       esac
+       branch=$(cat "$GIT_DIR/refs/heads/$branch_name") &&
+           branch=$(git-rev-parse --verify "$branch^0") ||
+               die "Seriously, what branch are you talking about?"
+       case "$option" in
+       -D)
            ;;
        *)
-           echo >&2 "The branch '$branch_name' is not a strict subset of your current HEAD.
-If you are sure you want to delete it, run 'git branch -D $branch_name'."
-           exit 1
+           mbs=$(git-merge-base -a "$branch" HEAD | tr '\012' ' ')
+           case " $mbs " in
+           *' '$branch' '*)
+               # the merge base of branch and HEAD contains branch --
+               # which means that the HEAD contains everything in the HEAD.
+               ;;
+           *)
+               echo >&2 "The branch '$branch_name' is not a strict subset of your current HEAD.
+    If you are sure you want to delete it, run 'git branch -D $branch_name'."
+               exit 1
+               ;;
+           esac
            ;;
        esac
-       ;;
-    esac
-    rm -f "$GIT_DIR/refs/heads/$branch_name"
-    echo "Deleted branch $branch_name."
+       rm -f "$GIT_DIR/refs/heads/$branch_name"
+       echo "Deleted branch $branch_name."
+    done
     exit 0
 }
 
+force=
 while case "$#,$1" in 0,*) break ;; *,-*) ;; *) break ;; esac
 do
        case "$1" in
        -d | -D)
-               delete_branch "$1" "$2"
+               delete_branch "$@"
                exit
                ;;
+       -f)
+               force="$1"
+               ;;
        --)
                shift
                break
@@ -68,8 +77,6 @@ done
 
 case "$#" in
 0)
-       headref=$(GIT_DIR="$GIT_DIR" git-symbolic-ref HEAD |
-                 sed -e 's|^refs/heads/||')
        git-rev-parse --symbolic --all |
        sed -ne 's|^refs/heads/||p' |
        sort |
@@ -93,6 +100,18 @@ branchname="$1"
 
 rev=$(git-rev-parse --verify "$head") || exit
 
-[ -e "$GIT_DIR/refs/heads/$branchname" ] && die "$branchname already exists"
+git-check-ref-format "heads/$branchname" ||
+       die "we do not like '$branchname' as a branch name."
+
+if [ -e "$GIT_DIR/refs/heads/$branchname" ]
+then
+       if test '' = "$force"
+       then
+               die "$branchname already exists."
+       elif test "$branchname" = "$headref"
+       then
+               die "cannot force-update the current branch."
+       fi
+fi
+git update-ref "refs/heads/$branchname" $rev
 
-echo $rev > "$GIT_DIR/refs/heads/$branchname"