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authorMichael Haggerty <mhagger@alum.mit.edu>2013-10-30 05:32:58 (GMT)
committerJunio C Hamano <gitster@pobox.com>2013-10-30 21:16:35 (GMT)
commit0281c930f17042473e973f39810c8f7c93955d7d (patch)
tree39adeeb0b048065ff28aaa73f51f12411dffdc04 /builtin/fetch.c
parente31a17f7416a85ee8c3260f8c8b7519ff7ea82b6 (diff)
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fetch: only opportunistically update references based on command line
The old code processed (tags == TAGS_SET) before adding the entries used to opportunistically update references mentioned on the command line. The result was that all tags were also considered candidates for opportunistic updating. This is harmless for two reasons: (a) because it would only add entries if there is a configured refspec that covers tags *and* both --tags and another refspec appear on the command-line; (b) because any extra entries would be deleted later by the call to ref_remove_duplicates() anyway. But, to avoid extra work and extra memory usage, and to make the implementation better match the intention, change the algorithm slightly: compute the opportunistic refspecs based only on the command-line arguments, storing the results into a separate temporary list. Then add the tags (which have to come earlier in the list so that they are not de-duped in favor of an opportunistic entry). Then concatenate the temporary list onto the main list. This change will also make later changes easier. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'builtin/fetch.c')
-rw-r--r--builtin/fetch.c44
1 files changed, 32 insertions, 12 deletions
diff --git a/builtin/fetch.c b/builtin/fetch.c
index 61e8117..0849f09 100644
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -272,32 +272,50 @@ static struct ref *get_ref_map(struct transport *transport,
const struct ref *remote_refs = transport_get_remote_refs(transport);
if (refspec_count || tags == TAGS_SET) {
- struct ref **old_tail;
+ /* opportunistically-updated references: */
+ struct ref *orefs = NULL, **oref_tail = &orefs;
for (i = 0; i < refspec_count; i++) {
get_fetch_map(remote_refs, &refspecs[i], &tail, 0);
if (refspecs[i].dst && refspecs[i].dst[0])
*autotags = 1;
}
- /* Merge everything on the command line, but not --tags */
+ /* Merge everything on the command line (but not --tags) */
for (rm = ref_map; rm; rm = rm->next)
rm->fetch_head_status = FETCH_HEAD_MERGE;
- if (tags == TAGS_SET)
- get_fetch_map(remote_refs, tag_refspec, &tail, 0);
/*
- * For any refs that we happen to be fetching via command-line
- * arguments, take the opportunity to update their configured
- * counterparts. However, we do not want to mention these
- * entries in FETCH_HEAD at all, as they would simply be
- * duplicates of existing entries.
+ * For any refs that we happen to be fetching via
+ * command-line arguments, the destination ref might
+ * have been missing or have been different than the
+ * remote-tracking ref that would be derived from the
+ * configured refspec. In these cases, we want to
+ * take the opportunity to update their configured
+ * remote-tracking reference. However, we do not want
+ * to mention these entries in FETCH_HEAD at all, as
+ * they would simply be duplicates of existing
+ * entries, so we set them FETCH_HEAD_IGNORE below.
+ *
+ * We compute these entries now, based only on the
+ * refspecs specified on the command line. But we add
+ * them to the list following the refspecs resulting
+ * from the tags option so that one of the latter,
+ * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
+ * by ref_remove_duplicates() in favor of one of these
+ * opportunistic entries with FETCH_HEAD_IGNORE.
*/
- old_tail = tail;
for (i = 0; i < transport->remote->fetch_refspec_nr; i++)
get_fetch_map(ref_map, &transport->remote->fetch[i],
- &tail, 1);
- for (rm = *old_tail; rm; rm = rm->next)
+ &oref_tail, 1);
+
+ if (tags == TAGS_SET)
+ get_fetch_map(remote_refs, tag_refspec, &tail, 0);
+
+ *tail = orefs;
+ for (rm = orefs; rm; rm = rm->next) {
rm->fetch_head_status = FETCH_HEAD_IGNORE;
+ tail = &rm->next;
+ }
} else {
/* Use the defaults */
struct remote *remote = transport->remote;
@@ -334,8 +352,10 @@ static struct ref *get_ref_map(struct transport *transport,
tail = &ref_map->next;
}
}
+
if (tags == TAGS_DEFAULT && *autotags)
find_non_local_tags(transport, &ref_map, &tail);
+
ref_remove_duplicates(ref_map);
return ref_map;