builtin/commit.c: extract ignore_non_trailer() helper function

diff --git a/git-svn.perl b/git-svn.perl
index 1823db135e223e4dfaa8123eedc87bad7db7a267..7349ffea5ad36f5677e7127fd693a72d155b1fa5 100755 (executable)
--- a/git-svn.perl
+++ b/git-svn.perl
@@ -1389,7 +1389,17 @@ sub cmd_multi_init {
                usage(1);
        }
 
-       $_prefix = '' unless defined $_prefix;
+       unless (defined $_prefix) {
+               $_prefix = '';
+               warn <<EOF
+WARNING: --prefix is not given, defaulting to empty prefix.
+         This is probably not what you want! In order to stay compatible
+         with regular remote-tracking refs, provide a prefix like
+         --prefix=origin/ (remember the trailing slash), which will cause
+         the SVN-tracking refs to be placed at refs/remotes/origin/*.
+NOTE: In Git v2.0, the default prefix will change from empty to 'origin/'.
+EOF
+       }
        if (defined $url) {
                $url = canonicalize_url($url);
                init_subdir(@_);