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src/patches.rs

@@ -0,0 +1,19 @@
+use anyhow::Result;
+use std::path::{Path, PathBuf};
+
+pub fn discover(recipe_dir: &Path) -> Result<Vec<PathBuf>> {
+    let patch_dir = recipe_dir.join("patches");
+    if !patch_dir.exists() {
+        return Ok(Vec::new());
+    }
+    let mut patches = Vec::new();
+    for entry in std::fs::read_dir(&patch_dir)? {
+        let entry = entry?;
+        let path = entry.path();
+        if path.extension().and_then(|ext| ext.to_str()) == Some("patch") {
+            patches.push(path);
+        }
+    }
+    patches.sort();
+    Ok(patches)
+}