Add cache argument for server command.

roentgen.py

@@ -226,7 +226,7 @@ if __name__ == "__main__":
     elif options.command == "element":
         draw_element(options)
     elif options.command == "server":
-        server.ui()
+        server.ui(options)
     elif options.command == "taginfo":
         from roentgen.taginfo import write_taginfo_project_file
 

roentgen/server.py

@@ -14,6 +14,7 @@ class Handler(BaseHTTPRequestHandler):
 
     def __init__(self, request, client_address, server):
         super().__init__(request, client_address, server)
+        self.cache: Path = Path("cache")
 
     def write(self, message):
         if isinstance(message, bytes):
@@ -35,7 +36,7 @@ class Handler(BaseHTTPRequestHandler):
             if not png_path.exists():
                 if not svg_path.exists():
                     tile = Tile(x, y, zoom)
-                    tile.draw(tile_path)
+                    tile.draw(tile_path, self.cache)
                 rasterize(svg_path, png_path)
         if zoom != 18:
             return
@@ -48,11 +49,12 @@ class Handler(BaseHTTPRequestHandler):
                 return
 
 
-def ui():
+def ui(options):
     server: Optional[HTTPServer] = None
     try:
         port: int = 8080
         server = HTTPServer(("", port), Handler)
+        server.cache_path = Path(options.cache)
         server.serve_forever()
         logging.info(f"Server started on port {port}.")
     finally:

roentgen/ui.py

@@ -31,9 +31,11 @@ def parse_options(args) -> argparse.Namespace:
     subparser.add_parser("taginfo")
     tile = subparser.add_parser("tile")
     element = subparser.add_parser("element")
+    server = subparser.add_parser("server")
 
     add_render_arguments(render)
     add_tile_arguments(tile)
+    add_server_arguments(server)
 
     element.add_argument("-n", "--node")
     element.add_argument("-w", "--way")
@@ -74,6 +76,16 @@ def add_tile_arguments(tile) -> None:
     )
 
 
+def add_server_arguments(tile) -> None:
+    """Add arguments for server command."""
+    tile.add_argument(
+        "--cache",
+        help="path for temporary OSM files",
+        default="cache",
+        metavar="<path>",
+    )
+
+
 def add_render_arguments(render) -> None:
     """Add arguments for render command."""
     render.add_argument(