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-rw-r--r--builtin-update-ref.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/builtin-update-ref.c b/builtin-update-ref.c
new file mode 100644
index 0000000000..e90737c350
--- /dev/null
+++ b/builtin-update-ref.c
@@ -0,0 +1,51 @@
+#include "cache.h"
+#include "refs.h"
+#include "builtin.h"
+#include "parse-options.h"
+
+static const char * const git_update_ref_usage[] = {
+ "git-update-ref [options] -d <refname> <oldval>",
+ "git-update-ref [options] <refname> <newval> [<oldval>]",
+ NULL
+};
+
+int cmd_update_ref(int argc, const char **argv, const char *prefix)
+{
+ const char *refname, *value, *oldval, *msg=NULL;
+ unsigned char sha1[20], oldsha1[20];
+ int delete = 0, no_deref = 0;
+ struct option options[] = {
+ OPT_STRING( 'm', NULL, &msg, "reason", "reason of the update"),
+ OPT_BOOLEAN('d', NULL, &delete, "deletes the reference"),
+ OPT_BOOLEAN( 0 , "no-deref", &no_deref,
+ "update <refname> not the one it points to"),
+ OPT_END(),
+ };
+
+ git_config(git_default_config);
+ argc = parse_options(argc, argv, options, git_update_ref_usage, 0);
+ if (msg && !*msg)
+ die("Refusing to perform update with empty message.");
+
+ if (argc < 2 || argc > 3)
+ usage_with_options(git_update_ref_usage, options);
+ refname = argv[0];
+ value = argv[1];
+ oldval = argv[2];
+
+ if (get_sha1(value, sha1))
+ die("%s: not a valid SHA1", value);
+
+ if (delete) {
+ if (oldval)
+ usage_with_options(git_update_ref_usage, options);
+ return delete_ref(refname, sha1);
+ }
+
+ hashclr(oldsha1);
+ if (oldval && *oldval && get_sha1(oldval, oldsha1))
+ die("%s: not a valid old SHA1", oldval);
+
+ return update_ref(msg, refname, sha1, oldval ? oldsha1 : NULL,
+ no_deref ? REF_NODEREF : 0, DIE_ON_ERR);
+}