Add "git branch" script

You can use it as

git branch <branchname> [start-point]

and it creates a new branch of name <branchname>.  If a starting point
is specified, that will be where the branch is created, otherwise it
will be created at the current HEAD.

The sequence

git branch xyz abc
git checkout xyz

can also be written as

git checkout -b xyz abc

as per the previous commit.

diff --git a/Makefile b/Makefile
index 03ea1636a77abd66813553d21d6b2b2a004a6ef4..93479ae653f3c6d351957f8a7151f3e0d0a748cb 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -34,7 +34,8 @@ SCRIPTS=git git-apply-patch-script git-merge-one-file-script git-prune-script \
        git-log-script git-shortlog git-cvsimport-script git-diff-script \
        git-reset-script git-add-script git-checkout-script git-clone-script \
        gitk git-cherry git-rebase-script git-relink-script git-repack-script \
-       git-format-patch-script git-sh-setup-script git-push-script
+       git-format-patch-script git-sh-setup-script git-push-script \
+       git-branch-script
 
 PROG=   git-update-cache git-diff-files git-init-db git-write-tree \
        git-read-tree git-commit-tree git-cat-file git-fsck-cache \

diff --git a/git-branch-script b/git-branch-script
new file mode 100755 (executable)
index 0000000..ade0abf
--- /dev/null
+++ b/git-branch-script
@@ -0,0 +1,11 @@
+#!/bin/sh
+
+. git-sh-setup-script || die "Not a git archive"
+
+branchname="$1"
+rev=$(git-rev-parse --verify --default HEAD "$2"^0) || exit
+
+[ -z "$branchname" ] && die "git branch: I want a branch name"
+[ -e "$GIT_DIR/refs/heads/$branchname" ] && die "$branchname already exists"
+
+echo $rev > "$GIT_DIR/refs/heads/$branchname"