feat: add managed sources

Signed-off-by: sisungo <[email protected]>

lib/sources.py

@@ -52,14 +52,7 @@ def zip_common_root(zip_file: zipfile.ZipFile) -> str | None:
     return root
 
 
-def sources_dir_name() -> str:
-    with open("./target/sources.tag") as file:
-        return file.read()
-
-
-def source_url(url: str):
-    if os.path.exists("./target/sources.tag"):
-        return
+def download_decompress(url: str) -> str:
     download_path = f"./target/{filename(url)}"
     download(url, download_path)
 
@@ -83,6 +76,18 @@ def source_url(url: str):
         with tarfile.open(download_path, "r") as tar:
             tar.extractall(extract_dir)
 
+    return sources_dir
+
+
+def sources_dir_name() -> str:
+    with open("./target/sources.tag") as file:
+        return file.read()
+
+
+def source_url(url: str):
+    if os.path.exists("./target/sources.tag"):
+        return
+    sources_dir = download_decompress(url)
     with open("./target/sources.tag", "wt+") as file:
         file.write(sources_dir)