Update recache script description

maintenance/tiles/recache.py

@@ -7,6 +7,7 @@
 """
 
 import argparse
+import os
 from pathlib import Path
 import re
 import sys
@@ -21,7 +22,7 @@ def clear_cache(cache_dir: Path, tile: str):
         print(f"Warning: cached tile {tile} did not exist", file=sys.stderr)
 
 def recreate_tile(hostname: str, port: int, tile: str):
-    tile_url = f'{hostname}/tiles/{tile}'
+    tile_url = f'{hostname}:{port}/tiles/{tile}'
     req = requests.get(tile_url)
     if req.status_code != 200:
         raise Exception(f"Tile request for tile {tile} returned status {req.status_code} (data: {req.json()})")
@@ -44,7 +45,7 @@ def main(cache_dir: Path, tile_list: Path, hostname: str, port: int):
 
 
 if __name__=='__main__':
-    parser = argparse.ArgumentParser(
+    parser = argparse.ArgumentParser(description=
         '''
 Re-cache map tiles listed in a file.
 
@@ -57,11 +58,11 @@ if __name__=='__main__':
 
 The order of lines in the file determines the order of re-caching.
 Names of re-cached tiles are printed to standard output.
-        ''')
+        ''', formatter_class=argparse.RawDescriptionHelpFormatter)
 
     parser.add_argument('cache_directory', type=Path, help='The root directory of the tile cache (needs to be local)')
     parser.add_argument('tile_list', type=Path, help='Path to the list of tiles that should be re-cached.')
-    parser.add_argument('--hostname', type=str, default="127.0.0.1", help='The hostname of the tile server')
+    parser.add_argument('--hostname', type=str, default="http://127.0.0.1", help='The hostname of the tile server')
     parser.add_argument('--port', type=int, default=3000, help='The port numbre of the tile server')
 
     args = parser.parse_args()