From d026e318274cd46dbcaf9b1761102e543fbf123a Mon Sep 17 00:00:00 2001
From: Peter Hutterer <peter.hutterer@who-t.net>
Date: Thu, 24 Aug 2023 13:52:24 +1000
Subject: [PATCH] =?UTF-8?q?=F0=9F=92=84=20zx:=20support=20--help=20and=20-?=
 =?UTF-8?q?h?=
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Best. Feature. Ever!
---
 zbus_xmlgen/src/main.rs | 22 +++++++++++++++-------
 1 file changed, 15 insertions(+), 7 deletions(-)

diff --git a/zbus_xmlgen/src/main.rs b/zbus_xmlgen/src/main.rs
index 19827f1bd..64980fddf 100644
--- a/zbus_xmlgen/src/main.rs
+++ b/zbus_xmlgen/src/main.rs
@@ -19,6 +19,16 @@ use zbus_xml::{Interface, Node};
 use zbus_xmlgen::GenTrait;
 use zvariant::ObjectPath;
 
+fn usage() {
+    eprintln!(
+        r#"Usage:
+  zbus-xmlgen <interface.xml>
+  zbus-xmlgen --system|--session <service> <object_path>
+  zbus-xmlgen --address <address> <service> <object_path>
+"#
+    );
+}
+
 fn main() -> Result<(), Box<dyn Error>> {
     let input_src;
 
@@ -84,6 +94,10 @@ fn main() -> Result<(), Box<dyn Error>> {
                 Some(path),
             )
         }
+        Some(help) if help == "--help" || help == "-h" => {
+            usage();
+            return Ok(());
+        }
         Some(path) => {
             input_src = Path::new(&path)
                 .file_name()
@@ -94,13 +108,7 @@ fn main() -> Result<(), Box<dyn Error>> {
             (Node::from_reader(f)?, None, None)
         }
         None => {
-            eprintln!(
-                r#"Usage:
-  zbus-xmlgen <interface.xml>
-  zbus-xmlgen --system|--session <service> <object_path>
-  zbus-xmlgen --address <address> <service> <object_path>
-"#
-            );
+            usage();
             return Ok(());
         }
     };