Move refspec parser from connect.c and cache.h to remote.{c,h}
Signed-off-by: Daniel Barkalow <barkalow@iabervon.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Daniel Barkalow
committed by
Junio C Hamano
Junio C Hamano
parent
5751f49010
commit
6b62816cb1
246
remote.c
246
remote.c
@ -201,6 +201,44 @@ static void read_config(void)
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git_config(handle_config);
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}
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static struct refspec *parse_ref_spec(int nr_refspec, const char **refspec)
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{
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int i;
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struct refspec *rs = xcalloc(sizeof(*rs), nr_refspec);
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for (i = 0; i < nr_refspec; i++) {
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const char *sp, *ep, *gp;
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sp = refspec[i];
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if (*sp == '+') {
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rs[i].force = 1;
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sp++;
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}
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gp = strchr(sp, '*');
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ep = strchr(sp, ':');
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if (gp && ep && gp > ep)
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gp = NULL;
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if (ep) {
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if (ep[1]) {
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const char *glob = strchr(ep + 1, '*');
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if (!glob)
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gp = NULL;
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if (gp)
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rs[i].dst = xstrndup(ep + 1,
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glob - ep - 1);
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else
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rs[i].dst = xstrdup(ep + 1);
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}
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} else {
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ep = sp + strlen(sp);
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}
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if (gp) {
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rs[i].pattern = 1;
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ep = gp;
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}
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rs[i].src = xstrndup(sp, ep - sp);
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}
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return rs;
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}
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struct remote *remote_get(const char *name)
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{
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struct remote *ret;
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@ -219,5 +257,213 @@ struct remote *remote_get(const char *name)
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add_uri(ret, name);
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if (!ret->uri)
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return NULL;
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ret->push = parse_ref_spec(ret->push_refspec_nr, ret->push_refspec);
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return ret;
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}
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static int count_refspec_match(const char *pattern,
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struct ref *refs,
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struct ref **matched_ref)
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{
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int patlen = strlen(pattern);
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struct ref *matched_weak = NULL;
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struct ref *matched = NULL;
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int weak_match = 0;
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int match = 0;
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for (weak_match = match = 0; refs; refs = refs->next) {
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char *name = refs->name;
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int namelen = strlen(name);
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int weak_match;
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if (namelen < patlen ||
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memcmp(name + namelen - patlen, pattern, patlen))
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continue;
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if (namelen != patlen && name[namelen - patlen - 1] != '/')
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continue;
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/* A match is "weak" if it is with refs outside
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* heads or tags, and did not specify the pattern
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* in full (e.g. "refs/remotes/origin/master") or at
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* least from the toplevel (e.g. "remotes/origin/master");
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* otherwise "git push $URL master" would result in
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* ambiguity between remotes/origin/master and heads/master
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* at the remote site.
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*/
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if (namelen != patlen &&
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patlen != namelen - 5 &&
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prefixcmp(name, "refs/heads/") &&
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prefixcmp(name, "refs/tags/")) {
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/* We want to catch the case where only weak
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* matches are found and there are multiple
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* matches, and where more than one strong
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* matches are found, as ambiguous. One
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* strong match with zero or more weak matches
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* are acceptable as a unique match.
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*/
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matched_weak = refs;
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weak_match++;
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}
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else {
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matched = refs;
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match++;
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}
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}
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if (!matched) {
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*matched_ref = matched_weak;
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return weak_match;
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}
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else {
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*matched_ref = matched;
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return match;
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}
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}
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static void link_dst_tail(struct ref *ref, struct ref ***tail)
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{
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**tail = ref;
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*tail = &ref->next;
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**tail = NULL;
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}
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static struct ref *try_explicit_object_name(const char *name)
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{
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unsigned char sha1[20];
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struct ref *ref;
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int len;
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if (!*name) {
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ref = xcalloc(1, sizeof(*ref) + 20);
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strcpy(ref->name, "(delete)");
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hashclr(ref->new_sha1);
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return ref;
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}
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if (get_sha1(name, sha1))
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return NULL;
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len = strlen(name) + 1;
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ref = xcalloc(1, sizeof(*ref) + len);
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memcpy(ref->name, name, len);
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hashcpy(ref->new_sha1, sha1);
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return ref;
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}
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static int match_explicit_refs(struct ref *src, struct ref *dst,
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struct ref ***dst_tail, struct refspec *rs,
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int rs_nr)
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{
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int i, errs;
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for (i = errs = 0; i < rs_nr; i++) {
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struct ref *matched_src, *matched_dst;
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const char *dst_value = rs[i].dst;
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if (dst_value == NULL)
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dst_value = rs[i].src;
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matched_src = matched_dst = NULL;
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switch (count_refspec_match(rs[i].src, src, &matched_src)) {
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case 1:
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break;
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case 0:
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/* The source could be in the get_sha1() format
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* not a reference name. :refs/other is a
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* way to delete 'other' ref at the remote end.
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*/
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matched_src = try_explicit_object_name(rs[i].src);
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if (matched_src)
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break;
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errs = 1;
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error("src refspec %s does not match any.",
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rs[i].src);
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break;
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default:
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errs = 1;
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error("src refspec %s matches more than one.",
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rs[i].src);
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break;
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}
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switch (count_refspec_match(dst_value, dst, &matched_dst)) {
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case 1:
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break;
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case 0:
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if (!memcmp(dst_value, "refs/", 5)) {
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int len = strlen(dst_value) + 1;
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matched_dst = xcalloc(1, sizeof(*dst) + len);
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memcpy(matched_dst->name, dst_value, len);
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link_dst_tail(matched_dst, dst_tail);
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}
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else if (!strcmp(rs[i].src, dst_value) &&
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matched_src) {
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/* pushing "master:master" when
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* remote does not have master yet.
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*/
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int len = strlen(matched_src->name) + 1;
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matched_dst = xcalloc(1, sizeof(*dst) + len);
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memcpy(matched_dst->name, matched_src->name,
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len);
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link_dst_tail(matched_dst, dst_tail);
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}
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else {
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errs = 1;
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error("dst refspec %s does not match any "
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"existing ref on the remote and does "
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"not start with refs/.", dst_value);
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}
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break;
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default:
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errs = 1;
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error("dst refspec %s matches more than one.",
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dst_value);
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break;
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}
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if (errs)
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continue;
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if (matched_dst->peer_ref) {
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errs = 1;
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error("dst ref %s receives from more than one src.",
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matched_dst->name);
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}
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else {
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matched_dst->peer_ref = matched_src;
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matched_dst->force = rs[i].force;
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}
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}
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return -errs;
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}
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static struct ref *find_ref_by_name(struct ref *list, const char *name)
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{
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for ( ; list; list = list->next)
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if (!strcmp(list->name, name))
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return list;
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return NULL;
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}
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int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
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int nr_refspec, char **refspec, int all)
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{
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struct refspec *rs =
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parse_ref_spec(nr_refspec, (const char **) refspec);
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if (nr_refspec)
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return match_explicit_refs(src, dst, dst_tail, rs, nr_refspec);
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/* pick the remainder */
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for ( ; src; src = src->next) {
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struct ref *dst_peer;
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if (src->peer_ref)
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continue;
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dst_peer = find_ref_by_name(dst, src->name);
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if ((dst_peer && dst_peer->peer_ref) || (!dst_peer && !all))
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continue;
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if (!dst_peer) {
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/* Create a new one and link it */
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int len = strlen(src->name) + 1;
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dst_peer = xcalloc(1, sizeof(*dst_peer) + len);
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memcpy(dst_peer->name, src->name, len);
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hashcpy(dst_peer->new_sha1, src->new_sha1);
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link_dst_tail(dst_peer, dst_tail);
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}
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dst_peer->peer_ref = src;
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}
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return 0;
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}
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