host_manager

scripts/http_host/http_host_lib/download_fonts.py

@@ -0,0 +1,43 @@
+import shutil
+import subprocess
+from pathlib import Path
+
+from http_host_lib.utils import download_if_size_differs
+
+
+def download_fonts(assets_dir: Path):
+    """
+    Download and extract font assets if their file size differ.
+    Making updates atomic, with extraction to a temp dest + rename
+    """
+
+    fonts_dir = assets_dir / 'fonts'
+    fonts_dir.mkdir(exist_ok=True, parents=True)
+
+    fonts_temp = assets_dir / 'fonts_temp'
+
+    for font in ['ml', 'omt', 'pm']:
+        url = f'https://assets.openfreemap.com/fonts/{font}.tgz'
+        local_file = fonts_dir / f'{font}.tgz'
+        if not download_if_size_differs(url, local_file):
+            continue
+
+        shutil.rmtree(fonts_temp, ignore_errors=True)
+        fonts_temp.mkdir()
+
+        subprocess.run(
+            ['tar', '-xzf', local_file, '-C', fonts_temp],
+            check=True,
+        )
+
+        target_dir = fonts_dir / font
+        target_dir_renamed = fonts_dir / f'{font}.bak'
+        temp_dir = fonts_temp / font
+
+        if target_dir.exists():
+            target_dir.rename(target_dir_renamed)
+        temp_dir.rename(target_dir)
+
+        shutil.rmtree(target_dir_renamed, ignore_errors=True)
+
+    shutil.rmtree(fonts_temp, ignore_errors=True)