Provide git_config with a callback-data parameter
[git/git.git] / builtin-update-ref.c
1 #include "cache.h"
2 #include "refs.h"
3 #include "builtin.h"
4 #include "parse-options.h"
5
6 static const char * const git_update_ref_usage[] = {
7 "git-update-ref [options] -d <refname> <oldval>",
8 "git-update-ref [options] <refname> <newval> [<oldval>]",
9 NULL
10 };
11
12 int cmd_update_ref(int argc, const char **argv, const char *prefix)
13 {
14 const char *refname, *value, *oldval, *msg=NULL;
15 unsigned char sha1[20], oldsha1[20];
16 int delete = 0, no_deref = 0;
17 struct option options[] = {
18 OPT_STRING( 'm', NULL, &msg, "reason", "reason of the update"),
19 OPT_BOOLEAN('d', NULL, &delete, "deletes the reference"),
20 OPT_BOOLEAN( 0 , "no-deref", &no_deref,
21 "update <refname> not the one it points to"),
22 OPT_END(),
23 };
24
25 git_config(git_default_config, NULL);
26 argc = parse_options(argc, argv, options, git_update_ref_usage, 0);
27 if (msg && !*msg)
28 die("Refusing to perform update with empty message.");
29
30 if (argc < 2 || argc > 3)
31 usage_with_options(git_update_ref_usage, options);
32 refname = argv[0];
33 value = argv[1];
34 oldval = argv[2];
35
36 if (get_sha1(value, sha1))
37 die("%s: not a valid SHA1", value);
38
39 if (delete) {
40 if (oldval)
41 usage_with_options(git_update_ref_usage, options);
42 return delete_ref(refname, sha1);
43 }
44
45 hashclr(oldsha1);
46 if (oldval && *oldval && get_sha1(oldval, oldsha1))
47 die("%s: not a valid old SHA1", oldval);
48
49 return update_ref(msg, refname, sha1, oldval ? oldsha1 : NULL,
50 no_deref ? REF_NODEREF : 0, DIE_ON_ERR);
51 }