Add another module useful for GitHub actions: get a repo's latest rel…

…ease URL

Lib/gftools/actions/getlatestversion.py

@@ -0,0 +1,32 @@
+import argparse
+import subprocess
+import os
+from github import Github
+import re
+
+g = Github(os.environ["GITHUB_TOKEN"])
+parser = argparse.ArgumentParser(description="Return the URL of a font's latest release artefact")
+parser.add_argument('--user', help='the repository username', default="notofonts")
+parser.add_argument('--repo', help='the repository name')
+parser.add_argument('family', help='the font family name')
+args = parser.parse_args()
+
+if not (args.user and args.repo):
+    repo_url = subprocess.check_output(["git", "remote", "get-url", "origin"]).decode("utf8").strip()
+    url_split = repo_url.split("/")
+    args.user, args.repo = url_split[3], url_split[4]
+repo = g.get_repo(args.user + '/' + args.repo)
+
+for release in repo.get_releases():
+    m = re.match(r"^(.*)-(v[\d.]+)", release.tag_name)
+    if not m:
+        print(f"Unparsable release {release.tag_name} in {repo_name}")
+        continue
+    family, version = m[1], m[2]
+    if family != args.family:
+        continue
+    assets = release.get_assets()
+    download_url = assets[0].browser_download_url
+    print(f"::set-output name=version::{version}")
+    print(f"::set-output name=url::{download_url}")
+    break