Merge branch 'jk/diff-graph-submodule-summary'

diff --git a/branch.c b/branch.c
index 2bef1e7e71b7cb3375b3d96fab5c4f20e0c3adff..6ae6a4c321ab8866a3e21f15302b5549a95b4646 100644 (file)
--- a/branch.c
+++ b/branch.c
@@ -197,6 +197,20 @@ int validate_new_branchname(const char *name, struct strbuf *ref,
        return 1;
 }
 
+static const char upstream_not_branch[] =
+N_("Cannot setup tracking information; starting point '%s' is not a branch.");
+static const char upstream_missing[] =
+N_("the requested upstream branch '%s' does not exist");
+static const char upstream_advice[] =
+N_("\n"
+"If you are planning on basing your work on an upstream\n"
+"branch that already exists at the remote, you may need to\n"
+"run \"git fetch\" to retrieve it.\n"
+"\n"
+"If you are planning to push out a new local branch that\n"
+"will track its remote counterpart, you may want to use\n"
+"\"git push -u\" to set the upstream config as you push.");
+
 void create_branch(const char *head,
                   const char *name, const char *start_name,
                   int force, int reflog, int clobber_head,
@@ -224,21 +238,30 @@ void create_branch(const char *head,
        }
 
        real_ref = NULL;
-       if (get_sha1(start_name, sha1))
+       if (get_sha1(start_name, sha1)) {
+               if (explicit_tracking) {
+                       if (advice_set_upstream_failure) {
+                               error(_(upstream_missing), start_name);
+                               advise(_(upstream_advice));
+                               exit(1);
+                       }
+                       die(_(upstream_missing), start_name);
+               }
                die("Not a valid object name: '%s'.", start_name);
+       }
 
        switch (dwim_ref(start_name, strlen(start_name), sha1, &real_ref)) {
        case 0:
                /* Not branching from any existing branch */
                if (explicit_tracking)
-                       die("Cannot setup tracking information; starting point is not a branch.");
+                       die(_(upstream_not_branch), start_name);
                break;
        case 1:
                /* Unique completion -- good, only if it is a real branch */
                if (prefixcmp(real_ref, "refs/heads/") &&
                    prefixcmp(real_ref, "refs/remotes/")) {
                        if (explicit_tracking)
-                               die("Cannot setup tracking information; starting point is not a branch.");
+                               die(_(upstream_not_branch), start_name);
                        else
                                real_ref = NULL;
                }