Write to output file

Buffer as much as possible in memory to keep the write atomic

.gitignore

@@ -0,0 +1 @@
+map.txt

create-nginx-map.py

@@ -11,6 +11,8 @@ import json
 TRAEFIK_HOST_RE = re.compile(r"Host\(`([a-z0-9\.-]+)`\)")
 
 CONFIG_FILE = Path.cwd() / "config.toml"
+OUTPUT_FILE = Path.cwd() / "map.txt"
+
 
 class Route(NamedTuple):
     name: str
@@ -94,8 +96,9 @@ def main():
     for route in routes:
         grouped_routes[route.hostname, route.destination].add(route.name)
 
-    for (hostname, destination), names in sorted(grouped_routes.items()):
-        print(f"{hostname}\t{destination};  # {', '.join(names)}")
+    with OUTPUT_FILE.open("w", buffering=1024 * 1024) as f:
+        for (hostname, destination), names in sorted(grouped_routes.items()):
+            print(f"{hostname}\t{destination};  # {', '.join(names)}", file=f)
 
     print("Found", len(routes), "routes, grouped into", len(grouped_routes), "groups")