Add red-hat-openshift script (#119)

The script only get versions 4.x and above, see script comments for more informations.

Note that the code related to git has been extracted to a common script so that it can be reused for the Debian script.

src/red-hat-openshift.py

@@ -0,0 +1,52 @@
+import re
+from pathlib import Path
+from common import endoflife
+from common.git import Git
+
+"""
+Fetch Red Hat OpenShift versions from the documentation git repository
+"""
+
+PRODUCT = "red-hat-openshift"
+REPO_URL = "https://github.com/openshift/openshift-docs.git"
+
+
+def get_versions_from_file(release_notes_file: Path) -> dict:
+    if not release_notes_file.exists():
+        return {}
+
+    with open(release_notes_file, "rb") as f:
+        plain = f.read().decode("utf-8")
+
+    return {
+        version: date
+        for (version, date) in re.findall(
+            r"{product-title}\s(?P<version>\d+\.\d+\.\d+).*$\n+Issued:\s(?P<date>\d{4}-\d\d-\d\d)$",
+            plain,
+            re.MULTILINE,
+        )
+    }
+
+git = Git(REPO_URL)
+git.setup()
+versions = {}
+
+# only fetch v4+ branches, because the format was different in openshift v3
+for branch in git.list_branches("refs/heads/enterprise-[4-9]*"):
+    version = branch.split("-")[1].replace(".", "-")
+    release_notes_file = f"release_notes/ocp-{version}-release-notes.adoc"
+    git.checkout(branch, file_list=[release_notes_file])
+    versions = {**versions, **get_versions_from_file(git.repo_dir / release_notes_file)}
+
+print(f"::group::{PRODUCT}")
+for version, date in versions.items():
+    print(f"{version}: {date}")
+print("::endgroup::")
+
+endoflife.write_releases(
+    PRODUCT,
+    dict(
+        # sort by date then version (desc)
+        sorted(versions.items(), key=lambda x: (x[1], x[0]), reverse=True)
+    ),
+)