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#include "cache.h" #include "refs.h" #include "builtin.h" static const char git_update_ref_usage[] = "git-update-ref [-m <reason>] (-d <refname> <value> | <refname> <value> [<oldval>])"; int cmd_update_ref(int argc, const char **argv, const char *prefix) { const char *refname=NULL, *value=NULL, *oldval=NULL, *msg=NULL; struct ref_lock *lock; unsigned char sha1[20], oldsha1[20]; int i, delete; delete = 0; 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 (!strcmp("-d", argv[i])) { delete = 1; 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); if (delete) { if (oldval) usage(git_update_ref_usage); return delete_ref(refname, sha1); } hashclr(oldsha1); if (oldval && *oldval && get_sha1(oldval, oldsha1)) die("%s: not a valid old SHA1", oldval); lock = lock_any_ref_for_update(refname, oldval ? oldsha1 : NULL); 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; }
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