ci: rewrite artifact download script to use GitHub Actions

ci/download-artifacts.py

@@ -0,0 +1,52 @@
+#!/usr/bin/env python
+
+"""Downloads GitHub Actions release artifacts."""
+
+import argparse
+import io
+import pathlib
+import zipfile
+
+import requests
+
+WORKFLOW_RUN_ARTIFACTS_URL = "https://api.github.com/repos/indygreg/python-zstandard/actions/runs/{run_id}/artifacts"
+
+
+def download_artifacts(token: str, run_id: str, dest: pathlib.Path):
+    if not dest.exists():
+        dest.mkdir(parents=True)
+
+    session = requests.session()
+    session.headers["Authorization"] = "token %s" % token
+
+    artifacts = session.get(
+        WORKFLOW_RUN_ARTIFACTS_URL.format(run_id=run_id)
+    ).json()
+
+    for entry in artifacts["artifacts"]:
+        download_url = entry["archive_download_url"]
+
+        print("downloading %s" % download_url)
+        zipdata = io.BytesIO(session.get(download_url).content)
+
+        with zipfile.ZipFile(zipdata, "r") as zf:
+            for name in zf.namelist():
+                name_path = pathlib.Path(name)
+                dest_path = dest / name_path.name
+                print("writing %s" % dest_path)
+
+                with dest_path.open("wb") as fh:
+                    fh.write(zf.read(name))
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument("token", help="GitHub token to authenticate with")
+    parser.add_argument(
+        "run_id", help='which GitHub Actions run download. e.g. "42"'
+    )
+    parser.add_argument("dest", help="destination directory")
+
+    args = parser.parse_args()
+
+    download_artifacts(args.token, args.run_id, pathlib.Path(args.dest))