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-rw-r--r--remote.c633
1 files changed, 633 insertions, 0 deletions
diff --git a/remote.c b/remote.c
new file mode 100644
index 0000000000..bb774d0bcc
--- /dev/null
+++ b/remote.c
@@ -0,0 +1,633 @@
+#include "cache.h"
+#include "remote.h"
+#include "refs.h"
+
+static struct remote **remotes;
+static int allocated_remotes;
+
+#define BUF_SIZE (2048)
+static char buffer[BUF_SIZE];
+
+static void add_push_refspec(struct remote *remote, const char *ref)
+{
+ int nr = remote->push_refspec_nr + 1;
+ remote->push_refspec =
+ xrealloc(remote->push_refspec, nr * sizeof(char *));
+ remote->push_refspec[nr-1] = ref;
+ remote->push_refspec_nr = nr;
+}
+
+static void add_fetch_refspec(struct remote *remote, const char *ref)
+{
+ int nr = remote->fetch_refspec_nr + 1;
+ remote->fetch_refspec =
+ xrealloc(remote->fetch_refspec, nr * sizeof(char *));
+ remote->fetch_refspec[nr-1] = ref;
+ remote->fetch_refspec_nr = nr;
+}
+
+static void add_uri(struct remote *remote, const char *uri)
+{
+ int nr = remote->uri_nr + 1;
+ remote->uri =
+ xrealloc(remote->uri, nr * sizeof(char *));
+ remote->uri[nr-1] = uri;
+ remote->uri_nr = nr;
+}
+
+static struct remote *make_remote(const char *name, int len)
+{
+ int i, empty = -1;
+
+ for (i = 0; i < allocated_remotes; i++) {
+ if (!remotes[i]) {
+ if (empty < 0)
+ empty = i;
+ } else {
+ if (len ? (!strncmp(name, remotes[i]->name, len) &&
+ !remotes[i]->name[len]) :
+ !strcmp(name, remotes[i]->name))
+ return remotes[i];
+ }
+ }
+
+ if (empty < 0) {
+ empty = allocated_remotes;
+ allocated_remotes += allocated_remotes ? allocated_remotes : 1;
+ remotes = xrealloc(remotes,
+ sizeof(*remotes) * allocated_remotes);
+ memset(remotes + empty, 0,
+ (allocated_remotes - empty) * sizeof(*remotes));
+ }
+ remotes[empty] = xcalloc(1, sizeof(struct remote));
+ if (len)
+ remotes[empty]->name = xstrndup(name, len);
+ else
+ remotes[empty]->name = xstrdup(name);
+ return remotes[empty];
+}
+
+static void read_remotes_file(struct remote *remote)
+{
+ FILE *f = fopen(git_path("remotes/%s", remote->name), "r");
+
+ if (!f)
+ return;
+ while (fgets(buffer, BUF_SIZE, f)) {
+ int value_list;
+ char *s, *p;
+
+ if (!prefixcmp(buffer, "URL:")) {
+ value_list = 0;
+ s = buffer + 4;
+ } else if (!prefixcmp(buffer, "Push:")) {
+ value_list = 1;
+ s = buffer + 5;
+ } else if (!prefixcmp(buffer, "Pull:")) {
+ value_list = 2;
+ s = buffer + 5;
+ } else
+ continue;
+
+ while (isspace(*s))
+ s++;
+ if (!*s)
+ continue;
+
+ p = s + strlen(s);
+ while (isspace(p[-1]))
+ *--p = 0;
+
+ switch (value_list) {
+ case 0:
+ add_uri(remote, xstrdup(s));
+ break;
+ case 1:
+ add_push_refspec(remote, xstrdup(s));
+ break;
+ case 2:
+ add_fetch_refspec(remote, xstrdup(s));
+ break;
+ }
+ }
+ fclose(f);
+}
+
+static void read_branches_file(struct remote *remote)
+{
+ const char *slash = strchr(remote->name, '/');
+ int n = slash ? slash - remote->name : 1000;
+ FILE *f = fopen(git_path("branches/%.*s", n, remote->name), "r");
+ char *s, *p;
+ int len;
+
+ if (!f)
+ return;
+ s = fgets(buffer, BUF_SIZE, f);
+ fclose(f);
+ if (!s)
+ return;
+ while (isspace(*s))
+ s++;
+ if (!*s)
+ return;
+ p = s + strlen(s);
+ while (isspace(p[-1]))
+ *--p = 0;
+ len = p - s;
+ if (slash)
+ len += strlen(slash);
+ p = xmalloc(len + 1);
+ strcpy(p, s);
+ if (slash)
+ strcat(p, slash);
+ add_uri(remote, p);
+}
+
+static char *default_remote_name = NULL;
+static const char *current_branch = NULL;
+static int current_branch_len = 0;
+
+static int handle_config(const char *key, const char *value)
+{
+ const char *name;
+ const char *subkey;
+ struct remote *remote;
+ if (!prefixcmp(key, "branch.") && current_branch &&
+ !strncmp(key + 7, current_branch, current_branch_len) &&
+ !strcmp(key + 7 + current_branch_len, ".remote")) {
+ free(default_remote_name);
+ default_remote_name = xstrdup(value);
+ }
+ if (prefixcmp(key, "remote."))
+ return 0;
+ name = key + 7;
+ subkey = strrchr(name, '.');
+ if (!subkey)
+ return error("Config with no key for remote %s", name);
+ if (*subkey == '/') {
+ warning("Config remote shorthand cannot begin with '/': %s", name);
+ return 0;
+ }
+ remote = make_remote(name, subkey - name);
+ if (!value) {
+ /* if we ever have a boolean variable, e.g. "remote.*.disabled"
+ * [remote "frotz"]
+ * disabled
+ * is a valid way to set it to true; we get NULL in value so
+ * we need to handle it here.
+ *
+ * if (!strcmp(subkey, ".disabled")) {
+ * val = git_config_bool(key, value);
+ * return 0;
+ * } else
+ *
+ */
+ return 0; /* ignore unknown booleans */
+ }
+ if (!strcmp(subkey, ".url")) {
+ add_uri(remote, xstrdup(value));
+ } else if (!strcmp(subkey, ".push")) {
+ add_push_refspec(remote, xstrdup(value));
+ } else if (!strcmp(subkey, ".fetch")) {
+ add_fetch_refspec(remote, xstrdup(value));
+ } else if (!strcmp(subkey, ".receivepack")) {
+ if (!remote->receivepack)
+ remote->receivepack = xstrdup(value);
+ else
+ error("more than one receivepack given, using the first");
+ }
+ return 0;
+}
+
+static void read_config(void)
+{
+ unsigned char sha1[20];
+ const char *head_ref;
+ int flag;
+ if (default_remote_name) // did this already
+ return;
+ default_remote_name = xstrdup("origin");
+ current_branch = NULL;
+ head_ref = resolve_ref("HEAD", sha1, 0, &flag);
+ if (head_ref && (flag & REF_ISSYMREF) &&
+ !prefixcmp(head_ref, "refs/heads/")) {
+ current_branch = head_ref + strlen("refs/heads/");
+ current_branch_len = strlen(current_branch);
+ }
+ git_config(handle_config);
+}
+
+static struct refspec *parse_ref_spec(int nr_refspec, const char **refspec)
+{
+ int i;
+ struct refspec *rs = xcalloc(sizeof(*rs), nr_refspec);
+ for (i = 0; i < nr_refspec; i++) {
+ const char *sp, *ep, *gp;
+ sp = refspec[i];
+ if (*sp == '+') {
+ rs[i].force = 1;
+ sp++;
+ }
+ gp = strchr(sp, '*');
+ ep = strchr(sp, ':');
+ if (gp && ep && gp > ep)
+ gp = NULL;
+ if (ep) {
+ if (ep[1]) {
+ const char *glob = strchr(ep + 1, '*');
+ if (!glob)
+ gp = NULL;
+ if (gp)
+ rs[i].dst = xstrndup(ep + 1,
+ glob - ep - 1);
+ else
+ rs[i].dst = xstrdup(ep + 1);
+ }
+ } else {
+ ep = sp + strlen(sp);
+ }
+ if (gp) {
+ rs[i].pattern = 1;
+ ep = gp;
+ }
+ rs[i].src = xstrndup(sp, ep - sp);
+ }
+ return rs;
+}
+
+struct remote *remote_get(const char *name)
+{
+ struct remote *ret;
+
+ read_config();
+ if (!name)
+ name = default_remote_name;
+ ret = make_remote(name, 0);
+ if (name[0] != '/') {
+ if (!ret->uri)
+ read_remotes_file(ret);
+ if (!ret->uri)
+ read_branches_file(ret);
+ }
+ if (!ret->uri)
+ add_uri(ret, name);
+ if (!ret->uri)
+ return NULL;
+ ret->fetch = parse_ref_spec(ret->fetch_refspec_nr, ret->fetch_refspec);
+ ret->push = parse_ref_spec(ret->push_refspec_nr, ret->push_refspec);
+ return ret;
+}
+
+int for_each_remote(each_remote_fn fn, void *priv)
+{
+ int i, result = 0;
+ read_config();
+ for (i = 0; i < allocated_remotes && !result; i++) {
+ struct remote *r = remotes[i];
+ if (!r)
+ continue;
+ if (!r->fetch)
+ r->fetch = parse_ref_spec(r->fetch_refspec_nr,
+ r->fetch_refspec);
+ if (!r->push)
+ r->push = parse_ref_spec(r->push_refspec_nr,
+ r->push_refspec);
+ result = fn(r, priv);
+ }
+ return result;
+}
+
+int remote_has_uri(struct remote *remote, const char *uri)
+{
+ int i;
+ for (i = 0; i < remote->uri_nr; i++) {
+ if (!strcmp(remote->uri[i], uri))
+ return 1;
+ }
+ return 0;
+}
+
+int remote_find_tracking(struct remote *remote, struct refspec *refspec)
+{
+ int find_src = refspec->src == NULL;
+ char *needle, **result;
+ int i;
+
+ if (find_src) {
+ if (refspec->dst == NULL)
+ return error("find_tracking: need either src or dst");
+ needle = refspec->dst;
+ result = &refspec->src;
+ } else {
+ needle = refspec->src;
+ result = &refspec->dst;
+ }
+
+ for (i = 0; i < remote->fetch_refspec_nr; i++) {
+ struct refspec *fetch = &remote->fetch[i];
+ const char *key = find_src ? fetch->dst : fetch->src;
+ const char *value = find_src ? fetch->src : fetch->dst;
+ if (!fetch->dst)
+ continue;
+ if (fetch->pattern) {
+ if (!prefixcmp(needle, key)) {
+ *result = xmalloc(strlen(value) +
+ strlen(needle) -
+ strlen(key) + 1);
+ strcpy(*result, value);
+ strcpy(*result + strlen(value),
+ needle + strlen(key));
+ refspec->force = fetch->force;
+ return 0;
+ }
+ } else if (!strcmp(needle, key)) {
+ *result = xstrdup(value);
+ refspec->force = fetch->force;
+ return 0;
+ }
+ }
+ return -1;
+}
+
+struct ref *alloc_ref(unsigned namelen)
+{
+ struct ref *ret = xmalloc(sizeof(struct ref) + namelen);
+ memset(ret, 0, sizeof(struct ref) + namelen);
+ return ret;
+}
+
+void free_refs(struct ref *ref)
+{
+ struct ref *next;
+ while (ref) {
+ next = ref->next;
+ if (ref->peer_ref)
+ free(ref->peer_ref);
+ free(ref);
+ ref = next;
+ }
+}
+
+static int count_refspec_match(const char *pattern,
+ struct ref *refs,
+ struct ref **matched_ref)
+{
+ int patlen = strlen(pattern);
+ struct ref *matched_weak = NULL;
+ struct ref *matched = NULL;
+ int weak_match = 0;
+ int match = 0;
+
+ for (weak_match = 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;
+
+ /* A match is "weak" if it is with refs outside
+ * heads or tags, and did not specify the pattern
+ * in full (e.g. "refs/remotes/origin/master") or at
+ * least from the toplevel (e.g. "remotes/origin/master");
+ * otherwise "git push $URL master" would result in
+ * ambiguity between remotes/origin/master and heads/master
+ * at the remote site.
+ */
+ if (namelen != patlen &&
+ patlen != namelen - 5 &&
+ prefixcmp(name, "refs/heads/") &&
+ prefixcmp(name, "refs/tags/")) {
+ /* We want to catch the case where only weak
+ * matches are found and there are multiple
+ * matches, and where more than one strong
+ * matches are found, as ambiguous. One
+ * strong match with zero or more weak matches
+ * are acceptable as a unique match.
+ */
+ matched_weak = refs;
+ weak_match++;
+ }
+ else {
+ matched = refs;
+ match++;
+ }
+ }
+ if (!matched) {
+ *matched_ref = matched_weak;
+ return weak_match;
+ }
+ else {
+ *matched_ref = matched;
+ return match;
+ }
+}
+
+static void tail_link_ref(struct ref *ref, struct ref ***tail)
+{
+ **tail = ref;
+ while (ref->next)
+ ref = ref->next;
+ *tail = &ref->next;
+}
+
+static struct ref *try_explicit_object_name(const char *name)
+{
+ unsigned char sha1[20];
+ struct ref *ref;
+ int len;
+
+ if (!*name) {
+ ref = alloc_ref(20);
+ strcpy(ref->name, "(delete)");
+ hashclr(ref->new_sha1);
+ return ref;
+ }
+ if (get_sha1(name, sha1))
+ return NULL;
+ len = strlen(name) + 1;
+ ref = alloc_ref(len);
+ memcpy(ref->name, name, len);
+ hashcpy(ref->new_sha1, sha1);
+ return ref;
+}
+
+static struct ref *make_linked_ref(const char *name, struct ref ***tail)
+{
+ struct ref *ret;
+ size_t len;
+
+ len = strlen(name) + 1;
+ ret = alloc_ref(len);
+ memcpy(ret->name, name, len);
+ tail_link_ref(ret, tail);
+ return ret;
+}
+
+static int match_explicit(struct ref *src, struct ref *dst,
+ struct ref ***dst_tail,
+ struct refspec *rs,
+ int errs)
+{
+ struct ref *matched_src, *matched_dst;
+
+ const char *dst_value = rs->dst;
+
+ if (rs->pattern)
+ return errs;
+
+ matched_src = matched_dst = NULL;
+ switch (count_refspec_match(rs->src, src, &matched_src)) {
+ case 1:
+ break;
+ case 0:
+ /* The source could be in the get_sha1() format
+ * not a reference name. :refs/other is a
+ * way to delete 'other' ref at the remote end.
+ */
+ matched_src = try_explicit_object_name(rs->src);
+ if (matched_src)
+ break;
+ error("src refspec %s does not match any.",
+ rs->src);
+ break;
+ default:
+ matched_src = NULL;
+ error("src refspec %s matches more than one.",
+ rs->src);
+ break;
+ }
+
+ if (!matched_src)
+ errs = 1;
+
+ if (dst_value == NULL)
+ dst_value = matched_src->name;
+
+ switch (count_refspec_match(dst_value, dst, &matched_dst)) {
+ case 1:
+ break;
+ case 0:
+ if (!memcmp(dst_value, "refs/", 5))
+ matched_dst = make_linked_ref(dst_value, dst_tail);
+ else
+ error("dst refspec %s does not match any "
+ "existing ref on the remote and does "
+ "not start with refs/.", dst_value);
+ break;
+ default:
+ matched_dst = NULL;
+ error("dst refspec %s matches more than one.",
+ dst_value);
+ break;
+ }
+ if (errs || matched_dst == NULL)
+ return 1;
+ 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;
+ matched_dst->force = rs->force;
+ }
+ return errs;
+}
+
+static int match_explicit_refs(struct ref *src, struct ref *dst,
+ struct ref ***dst_tail, struct refspec *rs,
+ int rs_nr)
+{
+ int i, errs;
+ for (i = errs = 0; i < rs_nr; i++)
+ errs |= match_explicit(src, dst, dst_tail, &rs[i], errs);
+ 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;
+}
+
+static const struct refspec *check_pattern_match(const struct refspec *rs,
+ int rs_nr,
+ const struct ref *src)
+{
+ int i;
+ for (i = 0; i < rs_nr; i++) {
+ if (rs[i].pattern && !prefixcmp(src->name, rs[i].src))
+ return rs + i;
+ }
+ return NULL;
+}
+
+/*
+ * Note. This is used only by "push"; refspec matching rules for
+ * push and fetch are subtly different, so do not try to reuse it
+ * without thinking.
+ */
+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, (const char **) refspec);
+
+ if (match_explicit_refs(src, dst, dst_tail, rs, nr_refspec))
+ return -1;
+
+ /* pick the remainder */
+ for ( ; src; src = src->next) {
+ struct ref *dst_peer;
+ const struct refspec *pat = NULL;
+ char *dst_name;
+ if (src->peer_ref)
+ continue;
+ if (nr_refspec) {
+ pat = check_pattern_match(rs, nr_refspec, src);
+ if (!pat)
+ continue;
+ }
+ else if (prefixcmp(src->name, "refs/heads/"))
+ /*
+ * "matching refs"; traditionally we pushed everything
+ * including refs outside refs/heads/ hierarchy, but
+ * that does not make much sense these days.
+ */
+ continue;
+
+ if (pat) {
+ const char *dst_side = pat->dst ? pat->dst : pat->src;
+ dst_name = xmalloc(strlen(dst_side) +
+ strlen(src->name) -
+ strlen(pat->src) + 2);
+ strcpy(dst_name, dst_side);
+ strcat(dst_name, src->name + strlen(pat->src));
+ } else
+ dst_name = xstrdup(src->name);
+ dst_peer = find_ref_by_name(dst, dst_name);
+ if (dst_peer && dst_peer->peer_ref)
+ /* We're already sending something to this ref. */
+ goto free_name;
+ if (!dst_peer && !nr_refspec && !all)
+ /* Remote doesn't have it, and we have no
+ * explicit pattern, and we don't have
+ * --all. */
+ goto free_name;
+ if (!dst_peer) {
+ /* Create a new one and link it */
+ dst_peer = make_linked_ref(dst_name, dst_tail);
+ hashcpy(dst_peer->new_sha1, src->new_sha1);
+ }
+ dst_peer->peer_ref = src;
+ free_name:
+ free(dst_name);
+ }
+ return 0;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-25 15:20:40 +0000