remote: die on config error when setting/adding branches

When we add or set new branches (e.g. by `git remote add -f` or
`git remote set-branches`) we do not check for error codes when
writing the branches to the configuration file. When persisting
the configuration failed we are left with a remote that has none
or not all of the branches that should have been set without
notifying the user.

Fix this issue by dying early on configuration error.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/remote.c b/builtin/remote.c
index 0771e425197f0d55415507afde12352d3a2fb333..6a7244e90df9118ca0ae151ba6940d02e596b18b 100644 (file)
--- a/builtin/remote.c
+++ b/builtin/remote.c
@@ -108,8 +108,8 @@ enum {
 #define MIRROR_PUSH 2
 #define MIRROR_BOTH (MIRROR_FETCH|MIRROR_PUSH)
 
-static int add_branch(const char *key, const char *branchname,
-               const char *remotename, int mirror, struct strbuf *tmp)
+static void add_branch(const char *key, const char *branchname,
+                      const char *remotename, int mirror, struct strbuf *tmp)
 {
        strbuf_reset(tmp);
        strbuf_addch(tmp, '+');
@@ -119,7 +119,7 @@ static int add_branch(const char *key, const char *branchname,
        else
                strbuf_addf(tmp, "refs/heads/%s:refs/remotes/%s/%s",
                                branchname, remotename, branchname);
-       return git_config_set_multivar(key, tmp->buf, "^$", 0);
+       git_config_set_multivar_or_die(key, tmp->buf, "^$", 0);
 }
 
 static const char mirror_advice[] =
@@ -206,9 +206,8 @@ static int add(int argc, const char **argv)
                if (track.nr == 0)
                        string_list_append(&track, "*");
                for (i = 0; i < track.nr; i++) {
-                       if (add_branch(buf.buf, track.items[i].string,
-                                      name, mirror, &buf2))
-                               return 1;
+                       add_branch(buf.buf, track.items[i].string,
+                                  name, mirror, &buf2);
                }
        }
 
@@ -1412,21 +1411,17 @@ static int remove_all_fetch_refspecs(const char *remote, const char *key)
        return git_config_set_multivar(key, NULL, NULL, 1);
 }
 
-static int add_branches(struct remote *remote, const char **branches,
-                       const char *key)
+static void add_branches(struct remote *remote, const char **branches,
+                        const char *key)
 {
        const char *remotename = remote->name;
        int mirror = remote->mirror;
        struct strbuf refspec = STRBUF_INIT;
 
        for (; *branches; branches++)
-               if (add_branch(key, *branches, remotename, mirror, &refspec)) {
-                       strbuf_release(&refspec);
-                       return 1;
-               }
+               add_branch(key, *branches, remotename, mirror, &refspec);
 
        strbuf_release(&refspec);
-       return 0;
 }
 
 static int set_remote_branches(const char *remotename, const char **branches,
@@ -1445,10 +1440,7 @@ static int set_remote_branches(const char *remotename, const char **branches,
                strbuf_release(&key);
                return 1;
        }
-       if (add_branches(remote, branches, key.buf)) {
-               strbuf_release(&key);
-               return 1;
-       }
+       add_branches(remote, branches, key.buf);
 
        strbuf_release(&key);
        return 0;