60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
#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;
|
|
}
|