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Commit | Line | Data |
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66bf85a4 LT |
1 | #include "cache.h" |
2 | #include "refs.h" | |
854b4629 | 3 | #include "builtin.h" |
66bf85a4 | 4 | |
5b16b090 SP |
5 | static const char git_update_ref_usage[] = |
6 | "git-update-ref <refname> <value> [<oldval>] [-m <reason>]"; | |
152da3df | 7 | |
a633fca0 | 8 | int cmd_update_ref(int argc, const char **argv, const char *prefix) |
66bf85a4 | 9 | { |
5b16b090 SP |
10 | const char *refname=NULL, *value=NULL, *oldval=NULL, *msg=NULL; |
11 | struct ref_lock *lock; | |
12 | unsigned char sha1[20], oldsha1[20]; | |
13 | int i; | |
66bf85a4 | 14 | |
0b0fe4a6 | 15 | setup_ident(); |
84a9b58c | 16 | git_config(git_default_config); |
5b16b090 SP |
17 | |
18 | for (i = 1; i < argc; i++) { | |
19 | if (!strcmp("-m", argv[i])) { | |
20 | if (i+1 >= argc) | |
21 | usage(git_update_ref_usage); | |
22 | msg = argv[++i]; | |
23 | if (!*msg) | |
24 | die("Refusing to perform update with empty message."); | |
25 | if (strchr(msg, '\n')) | |
26 | die("Refusing to perform update with \\n in message."); | |
27 | continue; | |
28 | } | |
29 | if (!refname) { | |
30 | refname = argv[i]; | |
31 | continue; | |
32 | } | |
33 | if (!value) { | |
34 | value = argv[i]; | |
35 | continue; | |
36 | } | |
37 | if (!oldval) { | |
38 | oldval = argv[i]; | |
39 | continue; | |
40 | } | |
41 | } | |
42 | if (!refname || !value) | |
66bf85a4 LT |
43 | usage(git_update_ref_usage); |
44 | ||
31fff305 | 45 | if (get_sha1(value, sha1)) |
66bf85a4 | 46 | die("%s: not a valid SHA1", value); |
a8e0d16d | 47 | hashclr(oldsha1); |
31fff305 | 48 | if (oldval && get_sha1(oldval, oldsha1)) |
66bf85a4 LT |
49 | die("%s: not a valid old SHA1", oldval); |
50 | ||
5b16b090 SP |
51 | lock = lock_any_ref_for_update(refname, oldval ? oldsha1 : NULL, 0); |
52 | if (!lock) | |
53 | return 1; | |
54 | if (write_ref_sha1(lock, sha1, msg) < 0) | |
55 | return 1; | |
854b4629 LS |
56 | |
57 | /* write_ref_sha1 always unlocks the ref, no need to do it explicitly */ | |
66bf85a4 LT |
58 | return 0; |
59 | } |