From 6f29d97bb6f1ebd05db022a2e431bd2703bedff9 Mon Sep 17 00:00:00 2001
From: Franz Dietrich <dietrich@teilgedanken.de>
Date: Fri, 2 Jan 2026 11:53:18 +0100
Subject: [PATCH] unify comandline parsing into function

---
 turtle-lib-macros/src/lib.rs | 24 ++----------------------
 turtle-lib/src/export.rs     | 12 ++++++++++++
 2 files changed, 14 insertions(+), 22 deletions(-)

diff --git a/turtle-lib-macros/src/lib.rs b/turtle-lib-macros/src/lib.rs
index ce33586..98b2788 100644
--- a/turtle-lib-macros/src/lib.rs
+++ b/turtle-lib-macros/src/lib.rs
@@ -129,17 +129,7 @@ pub fn turtle_main(args: TokenStream, input: TokenStream) -> TokenStream {
             #[macroquad::main(#window_title)]
             async fn main() {
                 // Parse command-line arguments for SVG export FIRST (before any graphics init)
-                let args: Vec<String> = std::env::args().collect();
-                let mut export_svg_path: Option<String> = None;
-                
-                let mut i = 1;
-                while i < args.len() {
-                    if args[i] == "--export-svg" && i + 1 < args.len() {
-                        export_svg_path = Some(args[i + 1].clone());
-                        break;
-                    }
-                    i += 1;
-                }
+                let export_svg_path = turtle_lib::export::parse_svg_export_arg();
 
                 // Handle SVG export mode (execute instantly without rendering)
                 if let Some(filename) = export_svg_path {
@@ -220,17 +210,7 @@ pub fn turtle_main(args: TokenStream, input: TokenStream) -> TokenStream {
             #[macroquad::main(#window_title)]
             async fn main() {
                 // Parse command-line arguments for SVG export FIRST (before any graphics init)
-                let args: Vec<String> = std::env::args().collect();
-                let mut export_svg_path: Option<String> = None;
-                
-                let mut i = 1;
-                while i < args.len() {
-                    if args[i] == "--export-svg" && i + 1 < args.len() {
-                        export_svg_path = Some(args[i + 1].clone());
-                        break;
-                    }
-                    i += 1;
-                }
+                let export_svg_path = turtle_lib::export::parse_svg_export_arg();
 
                 // Handle SVG export mode (execute instantly without rendering)
                 if let Some(filename) = export_svg_path {
diff --git a/turtle-lib/src/export.rs b/turtle-lib/src/export.rs
index 0f2a79e..98086f1 100644
--- a/turtle-lib/src/export.rs
+++ b/turtle-lib/src/export.rs
@@ -24,3 +24,15 @@ pub trait DrawingExporter {
     /// Returns an error if the export fails (e.g., file I/O error)
     fn export(&self, world: &TurtleWorld, filename: &str) -> Result<(), ExportError>;
 }
+
+pub fn parse_svg_export_arg() -> Option<String> {
+    let args: Vec<String> = std::env::args().collect();
+    let mut i = 1;
+    while i < args.len() {
+        if args[i] == "--export-svg" && i + 1 < args.len() {
+            return Some(args[i + 1].clone());
+        }
+        i += 1;
+    }
+    None
+}