fix: handle archives from github that are not named like their python…

… packages

chaski was built with the incorrect assumption that python packages always match the name of their github repos. This was true for the packages we were supporting, but with the addition of rpds-py, which is named rpds on github, this became a problem.

app.py

@@ -10,6 +10,7 @@
 import sys
 import tarfile
 from pathlib import Path
+from tempfile import TemporaryDirectory
 
 import requests
 import typer
@@ -333,8 +334,27 @@ def _get_dependency(dependency_name: str, version: str) -> Path:
     if not dl_resp.ok:
         console.print(f"Failed to download {url}", style="red")
         raise typer.Abort()
-    with tarfile.open(fileobj=io.BytesIO(dl_resp.content)) as tarball:
-        tarball.extractall(DEPENDENCIES_FOLDER)
+    with (
+        tarfile.open(fileobj=io.BytesIO(dl_resp.content)) as tarball,
+        TemporaryDirectory() as tmp_dir,
+    ):
+        tarball.extractall(tmp_dir)
+        extracted_files = list(Path(tmp_dir).iterdir())
+        if len(extracted_files) != 1:
+            console.print(
+                f"github tarball for {dependency_name}-{dependency_name} contains more "
+                "than a single 'toplevel' file. Please update chaski to handle this.",
+                style="red",
+            )
+            typer.Abort()
+        if not extracted_files[0].is_dir():
+            console.print(
+                f"github tarball for {dependency_name}-{dependency_name} doesn't "
+                "contain a directory. Please update chaski to handle this.",
+                style="red",
+            )
+            typer.Abort()
+        shutil.move(extracted_files[0], archive)
     return archive