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authorJunio C Hamano <junio@twinsun.com>2005-09-30 14:26:57 -0700
committerJunio C Hamano <junkio@cox.net>2005-10-01 23:19:33 -0700
commit8098a178b26dc7a158d129a092a5b78da6d12b72 (patch)
treea91aec067dd33319e2f33de565c42ef43b449b56 /symbolic-ref.c
parenta876ed83be5467d6075da8a16306724cb1babc2a (diff)
downloadgit-8098a178b26dc7a158d129a092a5b78da6d12b72.tar.gz
git-8098a178b26dc7a158d129a092a5b78da6d12b72.tar.xz
Add git-symbolic-ref
This adds the counterpart of git-update-ref that lets you read and create "symbolic refs". By default it uses a symbolic link to represent ".git/HEAD -> refs/heads/master", but it can be compiled to use the textfile symbolic ref. The places that did 'readlink .git/HEAD' and 'ln -s refs/heads/blah .git/HEAD' have been converted to use new git-symbolic-ref command, so that they can deal with either implementation. Signed-off-by: Junio C Hamano <junio@twinsun.com>
Diffstat (limited to 'symbolic-ref.c')
-rw-r--r--symbolic-ref.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/symbolic-ref.c b/symbolic-ref.c
new file mode 100644
index 000000000..af087d211
--- /dev/null
+++ b/symbolic-ref.c
@@ -0,0 +1,34 @@
+#include "cache.h"
+
+static const char git_symbolic_ref_usage[] =
+"git-symbolic-ref name [ref]";
+
+static int check_symref(const char *HEAD)
+{
+ unsigned char sha1[20];
+ const char *git_HEAD = strdup(git_path("%s", HEAD));
+ const char *git_refs_heads_master = resolve_ref(git_HEAD, sha1, 0);
+ if (git_refs_heads_master) {
+ /* we want to strip the .git/ part */
+ int pfxlen = strlen(git_HEAD) - strlen(HEAD);
+ puts(git_refs_heads_master + pfxlen);
+ }
+ else
+ die("No such ref: %s", HEAD);
+}
+
+int main(int argc, const char **argv)
+{
+ setup_git_directory();
+ switch (argc) {
+ case 2:
+ check_symref(argv[1]);
+ break;
+ case 3:
+ create_symref(strdup(git_path("%s", argv[1])), argv[2]);
+ break;
+ default:
+ usage(git_symbolic_ref_usage);
+ }
+ return 0;
+}