X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=git-branch.sh;h=e2db9063d4c63288c5834046962290ff9dfca127;hb=5f93926c3c5c4fe1def39de82076bc69ec89c058;hp=81b9e6cce138452ab50c1dee869b82a9f6706d34;hpb=a3b427b9fa1fdfd6d0c119d1f9db075ff92ffdf7;p=git.git

diff --git a/git-branch.sh b/git-branch.sh
index 81b9e6cc..e2db9063 100755
--- a/git-branch.sh
+++ b/git-branch.sh
@@ -3,7 +3,7 @@
 . git-sh-setup || die "Not a git archive"
 
 usage () {
-    echo >&2 "usage: $(basename $0)"' [<branchname> [start-point]]
+    echo >&2 "usage: $(basename $0)"' [-d <branch>] | [<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.
@@ -12,9 +12,68 @@ If two arguments, create a new branch <branchname> based off of <start-point>.
     exit 1
 }
 
+delete_branch () {
+    option="$1"
+    shift
+    headref=$(GIT_DIR="$GIT_DIR" git-symbolic-ref HEAD |
+    	       sed -e 's|^refs/heads/||')
+    for branch_name
+    do
+	case ",$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 "$option" in
+	-D)
+	    ;;
+	*)
+	    mbs=$(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 $branch_name'."
+		exit 1
+		;;
+	    esac
+	    ;;
+	esac
+	rm -f "$GIT_DIR/refs/heads/$branch_name"
+	echo "Deleted branch $branch_name."
+    done
+    exit 0
+}
+
+while case "$#,$1" in 0,*) break ;; *,-*) ;; *) break ;; esac
+do
+	case "$1" in
+	-d | -D)
+		delete_branch "$@"
+		exit
+		;;
+	--)
+		shift
+		break
+		;;
+	-*)
+		usage
+		;;
+	esac
+	shift
+done
+
 case "$#" in
 0)
-	headref=$(readlink "$GIT_DIR/HEAD" | sed -e 's|^refs/heads/||')
+	headref=$(GIT_DIR="$GIT_DIR" git-symbolic-ref HEAD |
+		  sed -e 's|^refs/heads/||')
 	git-rev-parse --symbolic --all |
 	sed -ne 's|^refs/heads/||p' |
 	sort |
@@ -36,13 +95,11 @@ case "$#" in
 esac
 branchname="$1"
 
-case "$branchname" in
--*)
-	usage;;
-esac
-
 rev=$(git-rev-parse --verify "$head") || exit
 
-[ -e "$GIT_DIR/refs/heads/$branchname" ] && die "$branchname already exists"
+[ -e "$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."
 
 echo $rev > "$GIT_DIR/refs/heads/$branchname"