Merge branch 'jn/branch-move-to-self'

[git.git] / builtin / branch.c

diff --git a/builtin/branch.c b/builtin/branch.c
index e1e486e4c51194e09df3779be254cb72855d1103..465ff6a513f3e314d4a526b6f8ee9f7a7c7b43f4 100644 (file)
--- a/builtin/branch.c
+++ b/builtin/branch.c
@@ -570,6 +570,7 @@ static void rename_branch(const char *oldname, const char *newname, int force)
        struct strbuf oldref = STRBUF_INIT, newref = STRBUF_INIT, logmsg = STRBUF_INIT;
        struct strbuf oldsection = STRBUF_INIT, newsection = STRBUF_INIT;
        int recovery = 0;
+       int clobber_head_ok;
 
        if (!oldname)
                die(_("cannot rename the current branch while not on any."));
@@ -585,7 +586,13 @@ static void rename_branch(const char *oldname, const char *newname, int force)
                        die(_("Invalid branch name: '%s'"), oldname);
        }
 
-       validate_new_branchname(newname, &newref, force, 0);
+       /*
+        * A command like "git branch -M currentbranch currentbranch" cannot
+        * cause the worktree to become inconsistent with HEAD, so allow it.
+        */
+       clobber_head_ok = !strcmp(oldname, newname);
+
+       validate_new_branchname(newname, &newref, force, clobber_head_ok);
 
        strbuf_addf(&logmsg, "Branch: renamed %s to %s",
                 oldref.buf, newref.buf);
@@ -784,7 +791,7 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
                if (kinds != REF_LOCAL_BRANCH)
                        die(_("-a and -r options to 'git branch' do not make sense with a branch name"));
                create_branch(head, argv[0], (argc == 2) ? argv[1] : head,
-                             force_create, reflog, track);
+                             force_create, reflog, 0, track);
        } else
                usage_with_options(builtin_branch_usage, options);