Issue #62: add cache path option.

roentgen.py

@@ -41,17 +41,19 @@ def main(argv) -> None:
     if not options:
         sys.exit(1)
 
-    input_file_names: List[Path]
+    cache_path: Path = Path(options.cache)
+    cache_path.mkdir(parents=True, exist_ok=True)
 
-    os.makedirs("map", exist_ok=True)
+    input_file_names: List[Path]
 
     if options.input_file_name:
         input_file_names = list(map(Path, options.input_file_name))
     else:
-        content = get_osm(options.boundary_box)
+        content = get_osm(options.boundary_box, cache_path)
         if not content:
             error("cannot download OSM data")
-        input_file_names = ["map" / Path(options.boundary_box + ".osm")]
+            sys.exit(1)
+        input_file_names = [cache_path / f"{options.boundary_box}.osm"]
 
     scheme: Scheme = Scheme(Path(TAGS_FILE_NAME))
     min_: np.array

roentgen/osm_getter.py

@@ -15,14 +15,17 @@ __author__ = "Sergey Vartanov"
 __email__ = "me@enzet.ru"
 
 
-def get_osm(boundary_box: str, to_update: bool = False) -> Optional[str]:
+def get_osm(
+    boundary_box: str, cache_path: Path, to_update: bool = False
+) -> Optional[str]:
     """
     Download OSM data from the web or get if from the cache.
 
     :param boundary_box: borders of the map part to download
+    :param cache_path: cache directory to store downloaded OSM files
     :param to_update: update cache files
     """
-    result_file_name: Path = "map" / Path(boundary_box + ".osm")
+    result_file_name: Path = cache_path / f"{boundary_box}.osm"
 
     if not to_update and result_file_name.is_file():
         return result_file_name.open().read()
@@ -30,7 +33,8 @@ def get_osm(boundary_box: str, to_update: bool = False) -> Optional[str]:
     matcher = re.match(
         "(?P<left>[0-9.-]*),(?P<bottom>[0-9.-]*)," +
         "(?P<right>[0-9.-]*),(?P<top>[0-9.-]*)",
-        boundary_box)
+        boundary_box
+    )
 
     if not matcher:
         error("invalid boundary box")

roentgen/tile.py

@@ -98,7 +98,7 @@ class Tile:
             f"{min(lon1, lon2):.3f},{min(lat1, lat2):.3f},"
             f"{max(lon1, lon2):.3f},{max(lat1, lat2):.3f}"
         )
-        content = get_osm(boundary_box)
+        content = get_osm(boundary_box, Path("cache"))
         if not content:
             error("cannot download OSM data")
             return None

roentgen/ui.py

@@ -47,6 +47,11 @@ def parse_options(args) -> argparse.Namespace:
         default=18,
         dest="scale",
         type=float)
+    parser.add_argument(
+        "--cache",
+        help="path for temporary OSM files",
+        default="cache"
+    )
     parser.add_argument(
         "--labels",
         help="label drawing mode: `no`, `main`, or `all`",