fix: allow empty custom modules dir (#77)

Co-authored-by: Gerald Pinder <gmpinder@gmail.com>

src/commands/template.rs

@@ -224,6 +224,11 @@ fn get_gitlab_registry_path() -> Option<String> {
     )
 }
 
+fn modules_exists() -> bool {
+    let mod_path = Path::new("modules");
+    mod_path.exists() && mod_path.is_dir()
+}
+
 #[derive(Debug, Clone, TypedBuilder, PartialEq, Eq, Hash)]
 struct AkmodsInfo {
     images: (String, Option<String>),

templates/Containerfile

@@ -10,7 +10,9 @@ COPY ./config /config
 # Custom modules overwrite defaults
 FROM scratch as stage-modules
 COPY --from=ghcr.io/ublue-os/bling:latest /modules /modules
+{%- if self::modules_exists() %}
 COPY ./modules /modules
+{%- endif %}
 
 {%- for info in self::get_akmods_info_list(recipe.modules_ext, os_version) %}
 FROM scratch as stage-akmods-{{ info.stage_name }}