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authorLukas Sandström <lukass@etek.chalmers.se>2006-06-13 20:22:00 (GMT)
committerJunio C Hamano <junkio@cox.net>2006-06-19 05:12:20 (GMT)
commit854b4629f97fb216a91805706cd61b33beb49172 (patch)
treecc664bff9638c8e002648704b46108c2bac911e1 /builtin-update-ref.c
parentfefe81c9964a12394d6ea81ce474ff402f0eb070 (diff)
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Make git-update-ref a builtin
Signed-off-by: Lukas Sandström <lukass@etek.chalmers.se> Signed-off-by: Junio C Hamano <junkio@cox.net>
Diffstat (limited to 'builtin-update-ref.c')
-rw-r--r--builtin-update-ref.c59
1 files changed, 59 insertions, 0 deletions
diff --git a/builtin-update-ref.c b/builtin-update-ref.c
new file mode 100644
index 0000000..00333c7
--- /dev/null
+++ b/builtin-update-ref.c
@@ -0,0 +1,59 @@
+#include "cache.h"
+#include "refs.h"
+#include "builtin.h"
+
+static const char git_update_ref_usage[] =
+"git-update-ref <refname> <value> [<oldval>] [-m <reason>]";
+
+int cmd_update_ref(int argc, const char **argv, char **envp)
+{
+ const char *refname=NULL, *value=NULL, *oldval=NULL, *msg=NULL;
+ struct ref_lock *lock;
+ unsigned char sha1[20], oldsha1[20];
+ int i;
+
+ setup_git_directory();
+ git_config(git_default_config);
+
+ for (i = 1; i < argc; i++) {
+ if (!strcmp("-m", argv[i])) {
+ if (i+1 >= argc)
+ usage(git_update_ref_usage);
+ msg = argv[++i];
+ if (!*msg)
+ die("Refusing to perform update with empty message.");
+ if (strchr(msg, '\n'))
+ die("Refusing to perform update with \\n in message.");
+ continue;
+ }
+ if (!refname) {
+ refname = argv[i];
+ continue;
+ }
+ if (!value) {
+ value = argv[i];
+ continue;
+ }
+ if (!oldval) {
+ oldval = argv[i];
+ continue;
+ }
+ }
+ if (!refname || !value)
+ usage(git_update_ref_usage);
+
+ if (get_sha1(value, sha1))
+ die("%s: not a valid SHA1", value);
+ memset(oldsha1, 0, 20);
+ if (oldval && get_sha1(oldval, oldsha1))
+ die("%s: not a valid old SHA1", oldval);
+
+ lock = lock_any_ref_for_update(refname, oldval ? oldsha1 : NULL, 0);
+ if (!lock)
+ return 1;
+ if (write_ref_sha1(lock, sha1, msg) < 0)
+ return 1;
+
+ /* write_ref_sha1 always unlocks the ref, no need to do it explicitly */
+ return 0;
+}