git-remote: reject adding remotes with invalid names

This can happen if the arguments to git-remote add is switched by the
user, and git would only show an error if fetching was also requested.
Fix it by using the refspec parsing engine to check if the requested
name can be parsed as a remote before add it.

Also cleanup so that the "remote.<name>.url" config name buffer is only
initialized once.

Signed-off-by: Jonas Fonseca <fonseca@diku.dk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin-remote.c b/builtin-remote.c
index d77f10a0eaa64466b919bcede37ad8c67b70b3fc..8fe31dbd9af2833f4dc6c3e93b9179f20d2a1d66 100644 (file)
--- a/builtin-remote.c
+++ b/builtin-remote.c
@@ -88,18 +88,22 @@ static int add(int argc, const char **argv)
        strbuf_init(&buf, 0);
        strbuf_init(&buf2, 0);
 
+       strbuf_addf(&buf2, "refs/heads/test:refs/remotes/%s/test", name);
+       if (!valid_fetch_refspec(buf2.buf))
+               die("'%s' is not a valid remote name", name);
+
        strbuf_addf(&buf, "remote.%s.url", name);
        if (git_config_set(buf.buf, url))
                return 1;
 
+       strbuf_reset(&buf);
+       strbuf_addf(&buf, "remote.%s.fetch", name);
+
        if (track.nr == 0)
                path_list_append("*", &track);
        for (i = 0; i < track.nr; i++) {
                struct path_list_item *item = track.items + i;
 
-               strbuf_reset(&buf);
-               strbuf_addf(&buf, "remote.%s.fetch", name);
-
                strbuf_reset(&buf2);
                if (mirror)
                        strbuf_addf(&buf2, "refs/%s:refs/%s",

diff --git a/remote.c b/remote.c
index 369dc3398cc22206497f17cd846702783f59cf76..06ad15627a6488f3a5e6c699828f6f721d8647ba 100644 (file)
--- a/remote.c
+++ b/remote.c
@@ -409,7 +409,7 @@ static void read_config(void)
        alias_all_urls();
 }
 
-static struct refspec *parse_refspec_internal(int nr_refspec, const char **refspec, int fetch)
+static struct refspec *parse_refspec_internal(int nr_refspec, const char **refspec, int fetch, int verify)
 {
        int i;
        int st;
@@ -519,17 +519,32 @@ static struct refspec *parse_refspec_internal(int nr_refspec, const char **refsp
        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);
+       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);
+       return parse_refspec_internal(nr_refspec, refspec, 0, 0);
 }
 
 static int valid_remote_nick(const char *name)

diff --git a/remote.h b/remote.h
index 7e9ae792dc69bb8b07cb9b8cf4e53845595d320e..a38774bbdc5acfb5ed9360ac92e1049fa79b26e1 100644 (file)
--- a/remote.h
+++ b/remote.h
@@ -67,6 +67,7 @@ void free_refs(struct ref *ref);
  */
 void ref_remove_duplicates(struct ref *ref_map);
 
+int valid_fetch_refspec(const char *refspec);
 struct refspec *parse_fetch_refspec(int nr_refspec, const char **refspec);
 struct refspec *parse_push_refspec(int nr_refspec, const char **refspec);
 

diff --git a/t/t5505-remote.sh b/t/t5505-remote.sh
index 0a7fea865d2be6e1a74e2016f336af22956de414..af2d077792c108a9125c73d1e4194f2532cb5156 100755 (executable)
--- a/t/t5505-remote.sh
+++ b/t/t5505-remote.sh
@@ -253,4 +253,10 @@ test_expect_success '"remote show" does not show symbolic refs' '
 
 '
 
+test_expect_success 'reject adding remote with an invalid name' '
+
+       ! git remote add some:url desired-name
+
+'
+
 test_done