submodule: add a helper to check if it is safe to write to .gitmodules

diff --git a/builtin/push.c b/builtin/push.c
index b5a941ccc2214d52ad41409bf4b83799bc0f9e1c..d09a42062c36d930b8147d6b0a4bcfedf34a2321 100644 (file)
--- a/builtin/push.c
+++ b/builtin/push.c
@@ -558,9 +558,9 @@ int cmd_push(int argc, const char **argv, const char *prefix)
                OPT_BIT( 0,  "porcelain", &flags, N_("machine-readable output"), TRANSPORT_PUSH_PORCELAIN),
                OPT_BIT('f', "force", &flags, N_("force updates"), TRANSPORT_PUSH_FORCE),
                { OPTION_CALLBACK,
-                 0, CAS_OPT_NAME, &cas, N_("refname>:<expect"),
+                 0, CAS_OPT_NAME, &cas, N_("<refname>:<expect>"),
                  N_("require old value of ref to be at this value"),
-                 PARSE_OPT_OPTARG, parseopt_push_cas_option },
+                 PARSE_OPT_OPTARG | PARSE_OPT_LITERAL_ARGHELP, parseopt_push_cas_option },
                { OPTION_CALLBACK, 0, "recurse-submodules", &recurse_submodules, "(check|on-demand|no)",
                        N_("control recursive pushing of submodules"),
                        PARSE_OPT_OPTARG, option_parse_recurse_submodules },