#include "cache.h"
#include "remote.h"
#include "refs.h"
+#include "commit.h"
+#include "diff.h"
+#include "revision.h"
+
+static struct refspec s_tag_refspec = {
+ 0,
+ 1,
+ 0,
+ "refs/tags/",
+ "refs/tags/"
+};
+
+const struct refspec *tag_refspec = &s_tag_refspec;
struct counted_string {
size_t len;
{
const char *slash = strchr(remote->name, '/');
char *frag;
- char *branch;
+ struct strbuf branch;
int n = slash ? slash - remote->name : 1000;
FILE *f = fopen(git_path("branches/%.*s", n, remote->name), "r");
char *s, *p;
strcpy(p, s);
if (slash)
strcat(p, slash);
+
+ /*
+ * With "slash", e.g. "git fetch jgarzik/netdev-2.6" when
+ * reading from $GIT_DIR/branches/jgarzik fetches "HEAD" from
+ * the partial URL obtained from the branches file plus
+ * "/netdev-2.6" and does not store it in any tracking ref.
+ * #branch specifier in the file is ignored.
+ *
+ * Otherwise, the branches file would have URL and optionally
+ * #branch specified. The "master" (or specified) branch is
+ * fetched and stored in the local branch of the same name.
+ */
+ strbuf_init(&branch, 0);
frag = strchr(p, '#');
if (frag) {
*(frag++) = '\0';
- branch = xmalloc(strlen(frag) + 12);
- strcpy(branch, "refs/heads/");
- strcat(branch, frag);
+ strbuf_addf(&branch, "refs/heads/%s", frag);
+ } else
+ strbuf_addstr(&branch, "refs/heads/master");
+ if (!slash) {
+ strbuf_addf(&branch, ":refs/heads/%s", remote->name);
} else {
- branch = "refs/heads/master";
+ strbuf_reset(&branch);
+ strbuf_addstr(&branch, "HEAD:");
}
add_url_alias(remote, p);
- add_fetch_refspec(remote, branch);
+ add_fetch_refspec(remote, strbuf_detach(&branch, 0));
remote->fetch_tags = 1; /* always auto-follow */
}
-static int handle_config(const char *key, const char *value)
+static int handle_config(const char *key, const char *value, void *cb)
{
const char *name;
const char *subkey;
}
if (!prefixcmp(key, "url.")) {
struct rewrite *rewrite;
- name = key + 5;
+ name = key + 4;
subkey = strrchr(name, '.');
if (!subkey)
return 0;
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_url(remote, xstrdup(value));
+ if (!strcmp(subkey, ".mirror"))
+ remote->mirror = git_config_bool(key, value);
+ else if (!strcmp(subkey, ".skipdefaultupdate"))
+ remote->skip_default_update = git_config_bool(key, value);
+
+ else if (!strcmp(subkey, ".url")) {
+ const char *v;
+ if (git_config_string(&v, key, value))
+ return -1;
+ add_url(remote, v);
} else if (!strcmp(subkey, ".push")) {
- add_push_refspec(remote, xstrdup(value));
+ const char *v;
+ if (git_config_string(&v, key, value))
+ return -1;
+ add_push_refspec(remote, v);
} else if (!strcmp(subkey, ".fetch")) {
- add_fetch_refspec(remote, xstrdup(value));
+ const char *v;
+ if (git_config_string(&v, key, value))
+ return -1;
+ add_fetch_refspec(remote, v);
} else if (!strcmp(subkey, ".receivepack")) {
+ const char *v;
+ if (git_config_string(&v, key, value))
+ return -1;
if (!remote->receivepack)
- remote->receivepack = xstrdup(value);
+ remote->receivepack = v;
else
error("more than one receivepack given, using the first");
} else if (!strcmp(subkey, ".uploadpack")) {
+ const char *v;
+ if (git_config_string(&v, key, value))
+ return -1;
if (!remote->uploadpack)
- remote->uploadpack = xstrdup(value);
+ remote->uploadpack = v;
else
error("more than one uploadpack given, using the first");
} else if (!strcmp(subkey, ".tagopt")) {
if (!strcmp(value, "--no-tags"))
remote->fetch_tags = -1;
} else if (!strcmp(subkey, ".proxy")) {
- remote->http_proxy = xstrdup(value);
+ return git_config_string((const char **)&remote->http_proxy,
+ key, value);
}
return 0;
}
current_branch =
make_branch(head_ref + strlen("refs/heads/"), 0);
}
- git_config(handle_config);
+ git_config(handle_config, NULL);
alias_all_urls();
}
-struct refspec *parse_ref_spec(int nr_refspec, const char **refspec)
+/*
+ * We need to make sure the tracking branches are well formed, but a
+ * wildcard refspec in "struct refspec" must have a trailing slash. We
+ * temporarily drop the trailing '/' while calling check_ref_format(),
+ * and put it back. The caller knows that a CHECK_REF_FORMAT_ONELEVEL
+ * error return is Ok for a wildcard refspec.
+ */
+static int verify_refname(char *name, int is_glob)
+{
+ int result, len = -1;
+
+ if (is_glob) {
+ len = strlen(name);
+ assert(name[len - 1] == '/');
+ name[len - 1] = '\0';
+ }
+ result = check_ref_format(name);
+ if (is_glob)
+ name[len - 1] = '/';
+ return result;
+}
+
+static struct refspec *parse_refspec_internal(int nr_refspec, const char **refspec, int fetch, int verify)
{
int i;
+ int st;
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 == '+') {
+ size_t llen;
+ int is_glob;
+ const char *lhs, *rhs;
+
+ llen = is_glob = 0;
+
+ lhs = refspec[i];
+ if (*lhs == '+') {
rs[i].force = 1;
- sp++;
+ lhs++;
+ }
+
+ rhs = strrchr(lhs, ':');
+
+ /*
+ * Before going on, special case ":" (or "+:") as a refspec
+ * for matching refs.
+ */
+ if (!fetch && rhs == lhs && rhs[1] == '\0') {
+ rs[i].matching = 1;
+ continue;
+ }
+
+ if (rhs) {
+ size_t rlen = strlen(++rhs);
+ is_glob = (2 <= rlen && !strcmp(rhs + rlen - 2, "/*"));
+ rs[i].dst = xstrndup(rhs, rlen - is_glob);
+ }
+
+ llen = (rhs ? (rhs - lhs - 1) : strlen(lhs));
+ if (2 <= llen && !memcmp(lhs + llen - 2, "/*", 2)) {
+ if ((rhs && !is_glob) || (!rhs && fetch))
+ goto invalid;
+ is_glob = 1;
+ llen--;
+ } else if (rhs && is_glob) {
+ goto invalid;
}
- 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);
+
+ rs[i].pattern = is_glob;
+ rs[i].src = xstrndup(lhs, llen);
+
+ if (fetch) {
+ /*
+ * LHS
+ * - empty is allowed; it means HEAD.
+ * - otherwise it must be a valid looking ref.
+ */
+ if (!*rs[i].src)
+ ; /* empty is ok */
+ else {
+ st = verify_refname(rs[i].src, is_glob);
+ if (st && st != CHECK_REF_FORMAT_ONELEVEL)
+ goto invalid;
+ }
+ /*
+ * RHS
+ * - missing is ok, and is same as empty.
+ * - empty is ok; it means not to store.
+ * - otherwise it must be a valid looking ref.
+ */
+ if (!rs[i].dst) {
+ ; /* ok */
+ } else if (!*rs[i].dst) {
+ ; /* ok */
+ } else {
+ st = verify_refname(rs[i].dst, is_glob);
+ if (st && st != CHECK_REF_FORMAT_ONELEVEL)
+ goto invalid;
}
} else {
- ep = sp + strlen(sp);
- }
- if (gp) {
- rs[i].pattern = 1;
- ep = gp;
+ /*
+ * LHS
+ * - empty is allowed; it means delete.
+ * - when wildcarded, it must be a valid looking ref.
+ * - otherwise, it must be an extended SHA-1, but
+ * there is no existing way to validate this.
+ */
+ if (!*rs[i].src)
+ ; /* empty is ok */
+ else if (is_glob) {
+ st = verify_refname(rs[i].src, is_glob);
+ if (st && st != CHECK_REF_FORMAT_ONELEVEL)
+ goto invalid;
+ }
+ else
+ ; /* anything goes, for now */
+ /*
+ * RHS
+ * - missing is allowed, but LHS then must be a
+ * valid looking ref.
+ * - empty is not allowed.
+ * - otherwise it must be a valid looking ref.
+ */
+ if (!rs[i].dst) {
+ st = verify_refname(rs[i].src, is_glob);
+ if (st && st != CHECK_REF_FORMAT_ONELEVEL)
+ goto invalid;
+ } else if (!*rs[i].dst) {
+ goto invalid;
+ } else {
+ st = verify_refname(rs[i].dst, is_glob);
+ if (st && st != CHECK_REF_FORMAT_ONELEVEL)
+ goto invalid;
+ }
}
- rs[i].src = xstrndup(sp, ep - sp);
}
return rs;
+
+ invalid:
+ if (verify) {
+ free(rs);
+ return NULL;
+ }
+ die("Invalid refspec '%s'", refspec[i]);
+}
+
+int valid_fetch_refspec(const char *fetch_refspec_str)
+{
+ const char *fetch_refspec[] = { fetch_refspec_str };
+ struct refspec *refspec;
+
+ refspec = parse_refspec_internal(1, fetch_refspec, 1, 1);
+ if (refspec)
+ free(refspec);
+ return !!refspec;
+}
+
+struct refspec *parse_fetch_refspec(int nr_refspec, const char **refspec)
+{
+ return parse_refspec_internal(nr_refspec, refspec, 1, 0);
+}
+
+struct refspec *parse_push_refspec(int nr_refspec, const char **refspec)
+{
+ return parse_refspec_internal(nr_refspec, refspec, 0, 0);
}
static int valid_remote_nick(const char *name)
add_url_alias(ret, name);
if (!ret->url)
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);
+ ret->fetch = parse_fetch_refspec(ret->fetch_refspec_nr, ret->fetch_refspec);
+ ret->push = parse_push_refspec(ret->push_refspec_nr, ret->push_refspec);
return ret;
}
if (!r)
continue;
if (!r->fetch)
- r->fetch = parse_ref_spec(r->fetch_refspec_nr,
- r->fetch_refspec);
+ r->fetch = parse_fetch_refspec(r->fetch_refspec_nr,
+ r->fetch_refspec);
if (!r->push)
- r->push = parse_ref_spec(r->push_refspec_nr,
- r->push_refspec);
+ r->push = parse_push_refspec(r->push_refspec_nr,
+ r->push_refspec);
result = fn(r, priv);
}
return result;
return ret;
}
+struct ref *alloc_ref_from_str(const char* str)
+{
+ struct ref *ret = alloc_ref(strlen(str) + 1);
+ strcpy(ret->name, str);
+ return ret;
+}
+
static struct ref *copy_ref(const struct ref *ref)
{
struct ref *ret = xmalloc(sizeof(struct ref) + strlen(ref->name) + 1);
return ret;
}
+void free_ref(struct ref *ref)
+{
+ if (!ref)
+ return;
+ free(ref->remote_status);
+ free(ref->symref);
+ free(ref);
+}
+
void free_refs(struct ref *ref)
{
struct ref *next;
while (ref) {
next = ref->next;
- if (ref->peer_ref)
- free(ref->peer_ref);
- free(ref);
+ free(ref->peer_ref);
+ free_ref(ref);
ref = next;
}
}
{
unsigned char sha1[20];
struct ref *ref;
- int len;
if (!*name) {
ref = alloc_ref(20);
}
if (get_sha1(name, sha1))
return NULL;
- len = strlen(name) + 1;
- ref = alloc_ref(len);
- memcpy(ref->name, name, len);
+ ref = alloc_ref_from_str(name);
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);
+ struct ref *ret = alloc_ref_from_str(name);
tail_link_ref(ret, tail);
return ret;
}
+static char *guess_ref(const char *name, struct ref *peer)
+{
+ struct strbuf buf = STRBUF_INIT;
+ unsigned char sha1[20];
+
+ const char *r = resolve_ref(peer->name, sha1, 1, NULL);
+ if (!r)
+ return NULL;
+
+ if (!prefixcmp(r, "refs/heads/"))
+ strbuf_addstr(&buf, "refs/heads/");
+ else if (!prefixcmp(r, "refs/tags/"))
+ strbuf_addstr(&buf, "refs/tags/");
+ else
+ return NULL;
+
+ strbuf_addstr(&buf, name);
+ return strbuf_detach(&buf, NULL);
+}
+
static int match_explicit(struct ref *src, struct ref *dst,
struct ref ***dst_tail,
- struct refspec *rs,
- int errs)
+ struct refspec *rs)
{
struct ref *matched_src, *matched_dst;
const char *dst_value = rs->dst;
+ char *dst_guess;
- if (rs->pattern)
- return errs;
+ if (rs->pattern || rs->matching)
+ return 0;
matched_src = matched_dst = NULL;
switch (count_refspec_match(rs->src, src, &matched_src)) {
*/
matched_src = try_explicit_object_name(rs->src);
if (!matched_src)
- error("src refspec %s does not match any.", rs->src);
+ return 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;
+ return error("src refspec %s matches more than one.", rs->src);
}
- if (!matched_src)
- errs = 1;
-
if (!dst_value) {
unsigned char sha1[20];
int flag;
- if (!matched_src)
- return errs;
dst_value = resolve_ref(matched_src->name, sha1, 1, &flag);
if (!dst_value ||
((flag & REF_ISSYMREF) &&
case 0:
if (!memcmp(dst_value, "refs/", 5))
matched_dst = make_linked_ref(dst_value, dst_tail);
+ else if((dst_guess = guess_ref(dst_value, matched_src)))
+ matched_dst = make_linked_ref(dst_guess, dst_tail);
else
- error("dst refspec %s does not match any "
- "existing ref on the remote and does "
- "not start with refs/.", dst_value);
+ error("unable to push to unqualified destination: %s\n"
+ "The destination refspec neither matches an "
+ "existing ref on the remote nor\n"
+ "begins with refs/, and we are unable to "
+ "guess a prefix based on the source ref.",
+ dst_value);
break;
default:
matched_dst = NULL;
dst_value);
break;
}
- if (errs || !matched_dst)
- return 1;
- if (matched_dst->peer_ref) {
- errs = 1;
- error("dst ref %s receives from more than one src.",
+ if (!matched_dst)
+ return -1;
+ if (matched_dst->peer_ref)
+ return 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;
+ return 0;
}
static int match_explicit_refs(struct ref *src, struct ref *dst,
{
int i, errs;
for (i = errs = 0; i < rs_nr; i++)
- errs |= match_explicit(src, dst, dst_tail, &rs[i], errs);
- return -errs;
+ errs += match_explicit(src, dst, dst_tail, &rs[i]);
+ return errs;
}
static const struct refspec *check_pattern_match(const struct refspec *rs,
const struct ref *src)
{
int i;
+ int matching_refs = -1;
for (i = 0; i < rs_nr; i++) {
+ if (rs[i].matching &&
+ (matching_refs == -1 || rs[i].force)) {
+ matching_refs = i;
+ continue;
+ }
+
if (rs[i].pattern && !prefixcmp(src->name, rs[i].src))
return rs + i;
}
- return NULL;
+ if (matching_refs != -1)
+ return rs + matching_refs;
+ else
+ return NULL;
}
/*
int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
int nr_refspec, const char **refspec, int flags)
{
- struct refspec *rs =
- parse_ref_spec(nr_refspec, (const char **) refspec);
+ struct refspec *rs;
int send_all = flags & MATCH_REFS_ALL;
int send_mirror = flags & MATCH_REFS_MIRROR;
+ static const char *default_refspec[] = { ":", 0 };
+ if (!nr_refspec) {
+ nr_refspec = 1;
+ refspec = default_refspec;
+ }
+ rs = parse_push_refspec(nr_refspec, (const char **) refspec);
if (match_explicit_refs(src, dst, dst_tail, rs, nr_refspec))
return -1;
char *dst_name;
if (src->peer_ref)
continue;
- if (nr_refspec) {
- pat = check_pattern_match(rs, nr_refspec, src);
- if (!pat)
- continue;
- }
- else if (!send_mirror && prefixcmp(src->name, "refs/heads/"))
+
+ pat = check_pattern_match(rs, nr_refspec, src);
+ if (!pat)
+ continue;
+
+ if (pat->matching) {
/*
* "matching refs"; traditionally we pushed everything
* including refs outside refs/heads/ hierarchy, but
* that does not make much sense these days.
*/
- continue;
+ if (!send_mirror && prefixcmp(src->name, "refs/heads/"))
+ continue;
+ dst_name = xstrdup(src->name);
- if (pat) {
+ } else {
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) {
+ if (dst_peer->peer_ref)
+ /* We're already sending something to this ref. */
+ goto free_name;
+
+ } else {
+ if (pat->matching && !(send_all || send_mirror))
+ /*
+ * Remote doesn't have it, and we have no
+ * explicit pattern, and we don't have
+ * --all nor --mirror.
+ */
+ goto free_name;
- if (!dst_peer && !nr_refspec && !(send_all || send_mirror))
- /*
- * Remote doesn't have it, and we have no
- * explicit pattern, and we don't have
- * --all nor --mirror.
- */
- 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;
- if (pat)
- dst_peer->force = pat->force;
+ dst_peer->force = pat->force;
free_name:
free(dst_name);
}
return NULL;
if (!prefixcmp(name, "refs/")) {
- ret = alloc_ref(strlen(name) + 1);
- strcpy(ret->name, name);
- return ret;
+ return alloc_ref_from_str(name);
}
if (!prefixcmp(name, "heads/") ||
struct ref ***tail,
int missing_ok)
{
- struct ref *ref_map, *rm;
+ struct ref *ref_map, **rmp;
if (refspec->pattern) {
ref_map = get_expanded_map(remote_refs, refspec);
}
}
- for (rm = ref_map; rm; rm = rm->next) {
- if (rm->peer_ref && check_ref_format(rm->peer_ref->name + 5))
- die("* refusing to create funny ref '%s' locally",
- rm->peer_ref->name);
+ for (rmp = &ref_map; *rmp; ) {
+ if ((*rmp)->peer_ref) {
+ int st = check_ref_format((*rmp)->peer_ref->name + 5);
+ if (st && st != CHECK_REF_FORMAT_ONELEVEL) {
+ struct ref *ignore = *rmp;
+ error("* Ignoring funny ref '%s' locally",
+ (*rmp)->peer_ref->name);
+ *rmp = (*rmp)->next;
+ free(ignore->peer_ref);
+ free(ignore);
+ continue;
+ }
+ }
+ rmp = &((*rmp)->next);
}
if (ref_map)
return 0;
}
+
+int resolve_remote_symref(struct ref *ref, struct ref *list)
+{
+ if (!ref->symref)
+ return 0;
+ for (; list; list = list->next)
+ if (!strcmp(ref->symref, list->name)) {
+ hashcpy(ref->old_sha1, list->old_sha1);
+ return 0;
+ }
+ return 1;
+}
+
+/*
+ * Return true if there is anything to report, otherwise false.
+ */
+int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs)
+{
+ unsigned char sha1[20];
+ struct commit *ours, *theirs;
+ char symmetric[84];
+ struct rev_info revs;
+ const char *rev_argv[10], *base;
+ int rev_argc;
+
+ /*
+ * Nothing to report unless we are marked to build on top of
+ * somebody else.
+ */
+ if (!branch ||
+ !branch->merge || !branch->merge[0] || !branch->merge[0]->dst)
+ return 0;
+
+ /*
+ * If what we used to build on no longer exists, there is
+ * nothing to report.
+ */
+ base = branch->merge[0]->dst;
+ if (!resolve_ref(base, sha1, 1, NULL))
+ return 0;
+ theirs = lookup_commit(sha1);
+ if (!theirs)
+ return 0;
+
+ if (!resolve_ref(branch->refname, sha1, 1, NULL))
+ return 0;
+ ours = lookup_commit(sha1);
+ if (!ours)
+ return 0;
+
+ /* are we the same? */
+ if (theirs == ours)
+ return 0;
+
+ /* Run "rev-list --left-right ours...theirs" internally... */
+ rev_argc = 0;
+ rev_argv[rev_argc++] = NULL;
+ rev_argv[rev_argc++] = "--left-right";
+ rev_argv[rev_argc++] = symmetric;
+ rev_argv[rev_argc++] = "--";
+ rev_argv[rev_argc] = NULL;
+
+ strcpy(symmetric, sha1_to_hex(ours->object.sha1));
+ strcpy(symmetric + 40, "...");
+ strcpy(symmetric + 43, sha1_to_hex(theirs->object.sha1));
+
+ init_revisions(&revs, NULL);
+ setup_revisions(rev_argc, rev_argv, &revs, NULL);
+ prepare_revision_walk(&revs);
+
+ /* ... and count the commits on each side. */
+ *num_ours = 0;
+ *num_theirs = 0;
+ while (1) {
+ struct commit *c = get_revision(&revs);
+ if (!c)
+ break;
+ if (c->object.flags & SYMMETRIC_LEFT)
+ (*num_ours)++;
+ else
+ (*num_theirs)++;
+ }
+
+ /* clear object flags smudged by the above traversal */
+ clear_commit_marks(ours, ALL_REV_FLAGS);
+ clear_commit_marks(theirs, ALL_REV_FLAGS);
+ return 1;
+}
+
+/*
+ * Return true when there is anything to report, otherwise false.
+ */
+int format_tracking_info(struct branch *branch, struct strbuf *sb)
+{
+ int num_ours, num_theirs;
+ const char *base;
+
+ if (!stat_tracking_info(branch, &num_ours, &num_theirs))
+ return 0;
+
+ base = branch->merge[0]->dst;
+ if (!prefixcmp(base, "refs/remotes/")) {
+ base += strlen("refs/remotes/");
+ }
+ if (!num_theirs)
+ strbuf_addf(sb, "Your branch is ahead of '%s' "
+ "by %d commit%s.\n",
+ base, num_ours, (num_ours == 1) ? "" : "s");
+ else if (!num_ours)
+ strbuf_addf(sb, "Your branch is behind '%s' "
+ "by %d commit%s, "
+ "and can be fast-forwarded.\n",
+ base, num_theirs, (num_theirs == 1) ? "" : "s");
+ else
+ strbuf_addf(sb, "Your branch and '%s' have diverged,\n"
+ "and have %d and %d different commit(s) each, "
+ "respectively.\n",
+ base, num_ours, num_theirs);
+ return 1;
+}