Upgrade script for pushing github releases

The github-release is no longer maintained by aktau. We need to upgrade
because of Github authentication warnings. We also add a custom python
script for uploading assets to github. We thought it would be a simple
script, but instead we need to deal with deletion of existing assets and
releases, so we decide instead to keep relying on that 3rd-party script.

Makefile

@@ -95,7 +95,7 @@ ci-bundle: bundle ## Create bundle and run basic tests
 ./releases/github-release: ## Download github-release binary
 	mkdir -p releases/
 	cd releases/ \
-		&& curl -sSL -o ./github-release.tar.bz2 "https://github.com/aktau/github-release/releases/download/v0.7.2/$(shell uname -s | tr "[:upper:]" "[:lower:]")-amd64-github-release.tar.bz2" \
+		&& curl -sSL -o ./github-release.tar.bz2 "https://github.com/meterup/github-release/releases/download/v0.7.5/$(shell uname -s | tr "[:upper:]" "[:lower:]")-amd64-github-release.tar.bz2" \
 		&& bzip2 -d -f ./github-release.tar.bz2 \
 		&& tar xf github-release.tar \
 		&& mv "bin/$(shell uname -s | tr "[:upper:]" "[:lower:]")/amd64/github-release" .

github-release.py

@@ -0,0 +1,83 @@
+#! /usr/bin/env python3
+
+"""
+This is a quick-and-dirty script to upload release assets to Github via the API.
+Currently, we do not use this script and rely instead on the github-release binary. This
+is just in case the github-release binary stops working (as it has before).
+
+Run script with:
+
+    GITHUB_TOKEN=s3cr3t ./github-release.py v3.00.00 ./dist/tutor-openedx-3.00.00.tar.gz "tutor-$(uname -s)_$(uname -m)"
+"""
+
+import argparse
+import os
+from urllib.parse import urlencode
+
+import requests
+
+HEADERS = {
+    "Accept": "application/vnd.github.v3+json",
+    "Authorization": "token {}".format(os.environ["GITHUB_TOKEN"]),
+}
+RELEASES_URL = "https://api.github.com/repos/overhangio/tutor/releases"
+
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="Create github releases and upload assets"
+    )
+    parser.add_argument("tag")
+    parser.add_argument("asset")
+    parser.add_argument("asset_name")
+    args = parser.parse_args()
+    release = get_or_create_release(args.tag)
+    overwrite_asset(args.asset, args.asset_name, release)
+
+
+def get_or_create_release(tag):
+    # https://developer.github.com/v3/repos/releases/#get-a-release-by-tag-name
+    url = "{}/tags/{}".format(RELEASES_URL, tag)
+    response = requests.get(url)
+    if response.status_code == 200:
+        print("Release {} already exists".format(tag))
+        return response.json()
+
+    print("Creating release {}".format(tag))
+    description = open(
+        os.path.join(os.path.dirname("__file__"), "docs", "_release_description.md")
+    ).read()
+    params = {"tag_name": tag, "name": tag, "body": description}
+    # https://developer.github.com/v3/repos/releases/#create-a-release
+    return requests.post(RELEASES_URL, json=params, headers=HEADERS,).json()
+
+
+def overwrite_asset(asset, asset_name, release):
+    # https://developer.github.com/v3/repos/releases/#list-assets-for-a-release
+    url = "{}/{}/assets".format(RELEASES_URL, release["id"])
+    for existing_asset in requests.get(url).json():
+        if existing_asset["name"] == asset_name:
+            print("Deleting existing asset")
+            # https://developer.github.com/v3/repos/releases/#delete-a-release-asset
+            delete_url = "{}/assets/{}".format(RELEASES_URL, existing_asset["id"])
+            response = requests.delete(delete_url, headers=HEADERS)
+            if response.status_code != 204:
+                print(response, response.content)
+                raise ValueError("Could not delete asset")
+    print("Uploading asset")
+    upload_asset(asset, asset_name, release)
+
+
+def upload_asset(asset, asset_name, release):
+    upload_url = release["upload_url"].replace(
+        "{?name,label}", "?" + urlencode({"name": asset_name})
+    )
+    files = {"file": (asset_name, open(asset, "rb"))}
+    response = requests.post(upload_url, files=files, headers=HEADERS)
+    if response.status_code > 299:
+        print(response, response.content)
+        raise ValueError("Could not upload asset to release")
+
+
+if __name__ == "__main__":
+    main()