#include "cache.h"
#include "commit.h"
+#include "tag.h"
#include "refs.h"
#include "pkt-line.h"
char *buf = malloc(100);
if (i > 900)
die("git-rev-list environment overflow");
- if (!is_zero_sha1(refs->old_sha1)) {
+ if (!is_zero_sha1(refs->old_sha1) &&
+ has_sha1_file(refs->old_sha1)) {
args[i++] = buf;
snprintf(buf, 50, "^%s", sha1_to_hex(refs->old_sha1));
buf += 50;
return 0;
}
-static int read_ref(const char *ref, unsigned char *sha1)
+static void unmark_and_free(struct commit_list *list, unsigned int mark)
{
- int fd, ret;
- char buffer[60];
-
- fd = open(git_path("%s", ref), O_RDONLY);
- if (fd < 0)
- return -1;
- ret = -1;
- if (read(fd, buffer, sizeof(buffer)) >= 40)
- ret = get_sha1_hex(buffer, sha1);
- close(fd);
- return ret;
+ while (list) {
+ struct commit_list *temp = list;
+ temp->item->object.flags &= ~mark;
+ list = temp->next;
+ free(temp);
+ }
}
-static int ref_newer(const unsigned char *new_sha1, const unsigned char *old_sha1)
+static int ref_newer(const unsigned char *new_sha1,
+ const unsigned char *old_sha1)
{
- struct commit *new, *old;
- struct commit_list *list;
+ struct object *o;
+ struct commit *old, *new;
+ struct commit_list *list, *used;
+ int found = 0;
- if (force_update)
- return 1;
- old = lookup_commit_reference(old_sha1);
- if (!old)
+ /* Both new and old must be commit-ish and new is descendant of
+ * old. Otherwise we require --force.
+ */
+ o = deref_tag(parse_object(old_sha1));
+ if (!o || o->type != commit_type)
return 0;
- new = lookup_commit_reference(new_sha1);
- if (!new)
+ old = (struct commit *) o;
+
+ o = deref_tag(parse_object(new_sha1));
+ if (!o || o->type != commit_type)
return 0;
+ new = (struct commit *) o;
+
if (parse_commit(new) < 0)
return 0;
- list = NULL;
+
+ used = list = NULL;
commit_list_insert(new, &list);
while (list) {
new = pop_most_recent_commit(&list, 1);
- if (new == old)
- return 1;
+ commit_list_insert(new, &used);
+ if (new == old) {
+ found = 1;
+ break;
+ }
}
- return 0;
+ unmark_and_free(list, 1);
+ unmark_and_free(used, 1);
+ return found;
}
-static int local_ref_nr_match;
-static char **local_ref_match;
-static struct ref *local_ref_list;
-static struct ref **local_last_ref;
+static struct ref *local_refs, **local_tail;
+static struct ref *remote_refs, **remote_tail;
-static int try_to_match(const char *refname, const unsigned char *sha1)
+static int one_local_ref(const char *refname, const unsigned char *sha1)
{
struct ref *ref;
- int len;
-
- if (!path_match(refname, local_ref_nr_match, local_ref_match)) {
- if (!send_all)
- return 0;
-
- /* If we have it listed already, skip it */
- for (ref = local_ref_list ; ref ; ref = ref->next) {
- if (!strcmp(ref->name, refname))
- return 0;
- }
- }
-
- len = strlen(refname)+1;
- ref = xmalloc(sizeof(*ref) + len);
- memset(ref->old_sha1, 0, 20);
+ int len = strlen(refname) + 1;
+ ref = xcalloc(1, sizeof(*ref) + len);
memcpy(ref->new_sha1, sha1, 20);
memcpy(ref->name, refname, len);
- ref->next = NULL;
- *local_last_ref = ref;
- local_last_ref = &ref->next;
+ *local_tail = ref;
+ local_tail = &ref->next;
return 0;
}
-static int send_pack(int in, int out, int nr_match, char **match)
+static void get_local_heads(void)
+{
+ local_tail = &local_refs;
+ for_each_ref(one_local_ref);
+}
+
+static int send_pack(int in, int out, int nr_refspec, char **refspec)
{
- struct ref *ref_list, **last_ref;
struct ref *ref;
int new_refs;
- /* First we get all heads, whether matching or not.. */
- last_ref = get_remote_heads(in, &ref_list, 0, NULL);
+ /* No funny business with the matcher */
+ remote_tail = get_remote_heads(in, &remote_refs, 0, NULL, 1);
+ get_local_heads();
+ /* match them up */
+ if (!remote_tail)
+ remote_tail = &remote_refs;
+ if (match_refs(local_refs, remote_refs, &remote_tail,
+ nr_refspec, refspec, send_all))
+ return -1;
/*
- * Go through the refs, see if we want to update
- * any of them..
+ * Finally, tell the other end!
*/
- for (ref = ref_list; ref; ref = ref->next) {
- unsigned char new_sha1[20];
- char *name = ref->name;
-
- if (nr_match && !path_match(name, nr_match, match))
- continue;
-
- if (read_ref(name, new_sha1) < 0)
- continue;
-
- if (!memcmp(ref->old_sha1, new_sha1, 20)) {
- fprintf(stderr, "'%s' unchanged\n", name);
+ new_refs = 0;
+ for (ref = remote_refs; ref; ref = ref->next) {
+ char old_hex[60], *new_hex;
+ if (!ref->peer_ref)
continue;
- }
-
- if (!ref_newer(new_sha1, ref->old_sha1)) {
- error("remote '%s' isn't a strict parent of local", name);
+ if (!memcmp(ref->old_sha1, ref->peer_ref->new_sha1, 20)) {
+ fprintf(stderr, "'%s': up-to-date\n", ref->name);
continue;
}
- /* Ok, mark it for update */
- memcpy(ref->new_sha1, new_sha1, 20);
- }
-
- /*
- * See if we have any refs that the other end didn't have
- */
- if (nr_match || send_all) {
- local_ref_nr_match = nr_match;
- local_ref_match = match;
- local_ref_list = ref_list;
- local_last_ref = last_ref;
- for_each_ref(try_to_match);
- }
+ /* This part determines what can overwrite what.
+ * The rules are:
+ *
+ * (0) you can always use --force or +A:B notation to
+ * selectively force individual ref pairs.
+ *
+ * (1) if the old thing does not exist, it is OK.
+ *
+ * (2) if you do not have the old thing, you are not allowed
+ * to overwrite it; you would not know what you are losing
+ * otherwise.
+ *
+ * (3) if both new and old are commit-ish, and new is a
+ * descendant of old, it is OK.
+ */
+
+ if (!force_update &&
+ !is_zero_sha1(ref->old_sha1) &&
+ !ref->force) {
+ if (!has_sha1_file(ref->old_sha1)) {
+ error("remote '%s' object %s does not "
+ "exist on local",
+ ref->name, sha1_to_hex(ref->old_sha1));
+ continue;
+ }
- /*
- * Finally, tell the other end!
- */
- new_refs = 0;
- for (ref = ref_list; ref; ref = ref->next) {
- char old_hex[60], *new_hex;
- if (is_zero_sha1(ref->new_sha1))
+ /* We assume that local is fsck-clean. Otherwise
+ * you _could_ have an old tag which points at
+ * something you do not have, which may or may not
+ * be a commit.
+ */
+ if (!ref_newer(ref->peer_ref->new_sha1,
+ ref->old_sha1)) {
+ error("remote ref '%s' is not a strict "
+ "subset of local ref '%s'.", ref->name,
+ ref->peer_ref->name);
+ continue;
+ }
+ }
+ memcpy(ref->new_sha1, ref->peer_ref->new_sha1, 20);
+ if (is_zero_sha1(ref->new_sha1)) {
+ error("cannot happen anymore");
continue;
+ }
new_refs++;
strcpy(old_hex, sha1_to_hex(ref->old_sha1));
new_hex = sha1_to_hex(ref->new_sha1);
packet_write(out, "%s %s %s", old_hex, new_hex, ref->name);
- fprintf(stderr, "'%s': updating from %s to %s\n", ref->name, old_hex, new_hex);
+ fprintf(stderr, "updating '%s'", ref->name);
+ if (strcmp(ref->name, ref->peer_ref->name))
+ fprintf(stderr, " using '%s'", ref->peer_ref->name);
+ fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
}
-
+
packet_flush(out);
if (new_refs)
- pack_objects(out, ref_list);
+ pack_objects(out, remote_refs);
close(out);
return 0;
}
+
int main(int argc, char **argv)
{
int i, nr_heads = 0;