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Renaming push.

Browse Source 
This allows git-send-pack to push local refs to a destination
repository under different names.

Here is the name mapping rules for refs.

* If there is no ref mapping on the command line:

 - if '--all' is specified, it is equivalent to specifying
   <local> ":" <local> for all the existing local refs on the
   command line
 - otherwise, it is equivalent to specifying <ref> ":" <ref> for
   all the refs that exist on both sides.

* <name> is just a shorthand for <name> ":" <name>

* <src> ":" <dst>

  push ref that matches <src> to ref that matches <dst>.

  - It is an error if <src> does not match exactly one of local
    refs.

  - It is an error if <dst> matches more than one remote refs.

  - If <dst> does not match any remote refs, either

    - it has to start with "refs/"; <dst> is used as the
      destination literally in this case.

    - <src> == <dst> and the ref that matched the <src> must not
      exist in the set of remote refs; the ref matched <src>
      locally is used as the name of the destination.

For example,

  - "git-send-pack --all <remote>" works exactly as before;

  - "git-send-pack <remote> master:upstream" pushes local master
    to remote ref that matches "upstream".  If there is no such
    ref, it is an error.

  - "git-send-pack <remote> master:refs/heads/upstream" pushes
    local master to remote refs/heads/upstream, even when
    refs/heads/upstream does not exist.

  - "git-send-pack <remote> master" into an empty remote
    repository pushes the local ref/heads/master to the remote
    ref/heads/master.

Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Junio C Hamano
2005-08-03 16:35:29 -07:00
parent 8d5afef0f9
commit f88395ac23
3 changed files with 228 additions and 96 deletions
Download Patch File Download Diff File Expand all files Collapse all files

172
connect.c
View File

@ -31,11 +31,9 @@ struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **ma
name = buffer + 41;
if (nr_match && !path_match(name, nr_match, match))
continue;
ref = xmalloc(sizeof(*ref) + len - 40);
ref = xcalloc(1, sizeof(*ref) + len - 40);
memcpy(ref->old_sha1, old_sha1, 20);
memset(ref->new_sha1, 0, 20);
memcpy(ref->name, buffer + 41, len - 40);
ref->next = NULL;
*list = ref;
list = &ref->next;
}
@ -81,6 +79,174 @@ int path_match(const char *path, int nr, char **match)
return 0;
}
struct refspec {
char *src;
char *dst;
};
static struct refspec *parse_ref_spec(int nr_refspec, char **refspec)
{
int i;
struct refspec *rs = xmalloc(sizeof(*rs) * (nr_refspec + 1));
for (i = 0; i < nr_refspec; i++) {
char *sp, *dp, *ep;
sp = refspec[i];
ep = strchr(sp, ':');
if (ep) {
dp = ep + 1;
*ep = 0;
}
else
dp = sp;
rs[i].src = sp;
rs[i].dst = dp;
}
rs[nr_refspec].src = rs[nr_refspec].dst = NULL;
return rs;
}
static int count_refspec_match(const char *pattern,
struct ref *refs,
struct ref **matched_ref)
{
int match;
int patlen = strlen(pattern);
for (match = 0; refs; refs = refs->next) {
char *name = refs->name;
int namelen = strlen(name);
if (namelen < patlen ||
memcmp(name + namelen - patlen, pattern, patlen))
continue;
if (namelen != patlen && name[namelen - patlen - 1] != '/')
continue;
match++;
*matched_ref = refs;
}
return match;
}
static void link_dst_tail(struct ref *ref, struct ref ***tail)
{
**tail = ref;
*tail = &ref->next;
**tail = NULL;
}
static int match_explicit_refs(struct ref *src, struct ref *dst,
struct ref ***dst_tail, struct refspec *rs)
{
int i, errs;
for (i = errs = 0; rs[i].src; i++) {
struct ref *matched_src, *matched_dst;
matched_src = matched_dst = NULL;
switch (count_refspec_match(rs[i].src, src, &matched_src)) {
case 1:
break;
case 0:
errs = 1;
error("src refspec %s does not match any.");
break;
default:
errs = 1;
error("src refspec %s matches more than one.",
rs[i].src);
break;
}
switch (count_refspec_match(rs[i].dst, dst, &matched_dst)) {
case 1:
break;
case 0:
if (!memcmp(rs[i].dst, "refs/", 5)) {
int len = strlen(rs[i].dst) + 1;
matched_dst = xcalloc(1, sizeof(*dst) + len);
memcpy(matched_dst->name, rs[i].dst, len);
link_dst_tail(matched_dst, dst_tail);
}
else if (!strcmp(rs[i].src, rs[i].dst) &&
matched_src) {
/* pushing "master:master" when
* remote does not have master yet.
*/
int len = strlen(matched_src->name);
matched_dst = xcalloc(1, sizeof(*dst) + len);
memcpy(matched_dst->name, matched_src->name,
len);
link_dst_tail(matched_dst, dst_tail);
}
else {
errs = 1;
error("dst refspec %s does not match any "
"existing ref on the remote and does "
"not start with refs/.", rs[i].dst);
}
break;
default:
errs = 1;
error("dst refspec %s matches more than one.",
rs[i].dst);
break;
}
if (errs)
continue;
if (matched_src->peer_ref) {
errs = 1;
error("src ref %s is sent to more than one dst.",
matched_src->name);
}
else
matched_src->peer_ref = matched_dst;
if (matched_dst->peer_ref) {
errs = 1;
error("dst ref %s receives from more than one src.",
matched_dst->name);
}
else
matched_dst->peer_ref = matched_src;
}
return -errs;
}
static struct ref *find_ref_by_name(struct ref *list, const char *name)
{
for ( ; list; list = list->next)
if (!strcmp(list->name, name))
return list;
return NULL;
}
int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
int nr_refspec, char **refspec, int all)
{
struct refspec *rs = parse_ref_spec(nr_refspec, refspec);
if (nr_refspec)
return match_explicit_refs(src, dst, dst_tail, rs);
/* pick the remainder */
for ( ; src; src = src->next) {
struct ref *dst_peer;
if (src->peer_ref)
continue;
dst_peer = find_ref_by_name(dst, src->name);
if (dst_peer && dst_peer->peer_ref)
continue;
if (!dst_peer) {
if (!all)
continue;
/* Create a new one and link it */
int len = strlen(src->name) + 1;
dst_peer = xcalloc(1, sizeof(*dst_peer) + len);
memcpy(dst_peer->name, src->name, len);
memcpy(dst_peer->new_sha1, src->new_sha1, 20);
link_dst_tail(dst_peer, dst_tail);
}
dst_peer->peer_ref = src;
}
return 0;
}
enum protocol {
PROTO_LOCAL = 1,
PROTO_SSH,