[PATCH 1/7] push: use die_for_incompatible_opt4() for --delete/--tags/--all/--mirror

["René Scharfe" <l.s.r@web.de>]

The push option --delete is incompatible with --all, --mirror, and
--tags; --tags is incompatible with --all and --mirror; --all is
incompatible with --mirror.  This means they are all incompatible with
each other.  And --branches is an alias for --all.

Use the function for checking four mutually incompatible options,
die_for_incompatible_opt4(), to perform this check in one place and
without repetition.  This is shorter and clearer.

Signed-off-by: René Scharfe <l.s.r@web.de>
---
 builtin/push.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/builtin/push.c b/builtin/push.c
index 2e708383c2..f77f424324 100644
--- a/builtin/push.c
+++ b/builtin/push.c
@@ -639,8 +639,10 @@ int cmd_push(int argc, const char **argv, const char *prefix)
 		: &push_options_config);
 	set_push_cert_flags(&flags, push_cert);

-	if (deleterefs && (tags || (flags & (TRANSPORT_PUSH_ALL | TRANSPORT_PUSH_MIRROR))))
-		die(_("options '%s' and '%s' cannot be used together"), "--delete", "--all/--branches/--mirror/--tags");
+	die_for_incompatible_opt4(deleterefs, "--delete",
+				  tags, "--tags",
+				  flags & TRANSPORT_PUSH_ALL, "--all/--branches",
+				  flags & TRANSPORT_PUSH_MIRROR, "--mirror");
 	if (deleterefs && argc < 2)
 		die(_("--delete doesn't make sense without any refs"));

@@ -677,19 +679,13 @@ int cmd_push(int argc, const char **argv, const char *prefix)
 		flags |= (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE);

 	if (flags & TRANSPORT_PUSH_ALL) {
-		if (tags)
-			die(_("options '%s' and '%s' cannot be used together"), "--all", "--tags");
 		if (argc >= 2)
 			die(_("--all can't be combined with refspecs"));
 	}
 	if (flags & TRANSPORT_PUSH_MIRROR) {
-		if (tags)
-			die(_("options '%s' and '%s' cannot be used together"), "--mirror", "--tags");
 		if (argc >= 2)
 			die(_("--mirror can't be combined with refspecs"));
 	}
-	if ((flags & TRANSPORT_PUSH_ALL) && (flags & TRANSPORT_PUSH_MIRROR))
-		die(_("options '%s' and '%s' cannot be used together"), "--all", "--mirror");

 	if (!is_empty_cas(&cas) && (flags & TRANSPORT_PUSH_FORCE_IF_INCLUDES))
 		cas.use_force_if_includes = 1;
--
2.43.0