initial commit

xray_lists/ip_render.py

@@ -0,0 +1,31 @@
+from __future__ import annotations
+
+import logging
+from pathlib import Path
+
+log = logging.getLogger("xray-lists.render")
+
+
+def render_elements_file(elements: list[str]) -> str:
+    if not elements:
+        return "elements = { }\n"
+    joined = ",\n    ".join(elements)
+    return f"elements = {{\n    {joined}\n}}\n"
+
+
+def write_if_changed(path: Path, content: str, dry_run: bool = False) -> bool:
+    old = path.read_text() if path.is_file() else None
+    if old == content:
+        log.debug("%s: unchanged", path)
+        return False
+
+    if dry_run:
+        log.info("[dry-run] would write %s", path)
+        return True
+
+    path.parent.mkdir(parents=True, exist_ok=True)
+    tmp = path.with_suffix(path.suffix + ".tmp")
+    tmp.write_text(content)
+    tmp.replace(path)
+    log.info("wrote %s", path)
+    return True