refactor(shader): _write_template_instance_metadata

src/hyprshade/shader/core.py

@@ -5,7 +5,7 @@
 from collections.abc import Callable
 from dataclasses import KW_ONLY, asdict, dataclass
 from functools import cached_property
-from typing import Any, ClassVar, Final, TypeAlias, TypeVar
+from typing import Any, ClassVar, Final, TextIO, TypeAlias, TypeVar
 
 from more_itertools import flatten
 
@@ -149,11 +149,11 @@ def variables(self) -> ShaderVariables | None:
     def _render_template(self, path: str) -> str:
         with open(path) as f:
             content = mustache.render(f, self.variables)
-        metadata = TemplateInstanceMetadata(source=path).encode()
+        metadata = TemplateInstanceMetadata(source=path)
         out_path = Shader._template_instance_path_from_source_path(path)
         os.makedirs(os.path.dirname(out_path), exist_ok=True)
         with open(out_path, "w") as f:
-            f.write(f"{Shader.TEMPLATE_METADATA_PREFIX} {metadata}\n")
+            Shader._write_template_instance_metadata(f, metadata)
             f.write("// This file was generated by Hyprshade.\n")
             f.write("// Do not edit it directly.\n")
             f.write("\n")
@@ -165,6 +165,15 @@ def _template_instance_path_from_source_path(path: str) -> str:
         file_name, _ = os.path.splitext(os.path.basename(path))
         return os.path.join(user_state_dir("hyprshade"), file_name)
 
+    @staticmethod
+    def _write_template_instance_metadata(
+        f: TextIO, /, metadata: TemplateInstanceMetadata
+    ) -> int:
+        lines = [
+            f"{Shader.TEMPLATE_METADATA_PREFIX} {metadata.encode()}",
+        ]
+        return f.write("\n".join(lines) + "\n")
+
     @staticmethod
     def _extract_template_instance_metadata(path: str) -> TemplateInstanceMetadata:
         with open(path) as f: