From ce8e5ed8e70d60a6f6292578c144089acf370920 Mon Sep 17 00:00:00 2001
From: Stefano Torresi <stefano@torresi.io>
Date: Wed, 25 Sep 2024 14:54:36 +0200
Subject: [PATCH] add support scripts for git operations

---
 scripts/get_version_from_git.sh        | 14 +++++
 scripts/gh_release_to_obs_changeset.py | 79 ++++++++++++++++++++++++++
 2 files changed, 93 insertions(+)
 create mode 100755 scripts/get_version_from_git.sh
 create mode 100755 scripts/gh_release_to_obs_changeset.py

diff --git a/scripts/get_version_from_git.sh b/scripts/get_version_from_git.sh
new file mode 100755
index 0000000..6fee348
--- /dev/null
+++ b/scripts/get_version_from_git.sh
@@ -0,0 +1,14 @@
+#!/bin/sh
+TAG=$( git tag | grep -E "[0-9]\.[0-9]\.[0-9]" | sort -rn | head -n1 )
+
+if [ -n "${TAG}" ]; then
+  COMMITS_SINCE_TAG=$(git rev-list "${TAG}".. --count)
+  if [ "${COMMITS_SINCE_TAG}" -gt 0 ]; then
+    COMMIT_SHA=$(git show -s --format=%ct.%h HEAD)
+    SUFFIX="+git.dev${COMMITS_SINCE_TAG}.${COMMIT_SHA}"
+  fi
+else
+  TAG="0"
+fi
+
+echo "${TAG}${SUFFIX}"
diff --git a/scripts/gh_release_to_obs_changeset.py b/scripts/gh_release_to_obs_changeset.py
new file mode 100755
index 0000000..12305ff
--- /dev/null
+++ b/scripts/gh_release_to_obs_changeset.py
@@ -0,0 +1,79 @@
+#!/usr/bin/env python3
+
+import argparse
+import json
+import os
+import sys
+import textwrap
+import urllib.request
+import urllib.error
+from datetime import datetime
+from datetime import timezone
+import tempfile
+
+parser = argparse.ArgumentParser(description="Add a GitHub release to an RPM changelog", usage=argparse.SUPPRESS)
+parser.add_argument("repo", help="GitHub repository (owner/name)")
+parser.add_argument("-t", "--tag", help="A specific Git tag to get; if none, latest will be used")
+parser.add_argument("-a", "--author", help="The author of the RPM changelog entry")
+parser.add_argument("-f", "--file", help="Prepend the new changelog entry to file instead of printing in stdout")
+
+if len(sys.argv) == 1:
+    parser.print_help(sys.stderr)
+    sys.exit(1)
+
+args = parser.parse_args()
+
+releaseSegment = f"/tags/{args.tag}" if args.tag else "/latest"
+url = f'https://api.github.com/repos/{args.repo}/releases{releaseSegment}'
+
+request = urllib.request.Request(url)
+
+githubToken = os.getenv("GITHUB_OAUTH_TOKEN")
+if githubToken:
+    request.add_header("Authorization", "token " + githubToken)
+
+try:
+    response = urllib.request.urlopen(request)
+except urllib.error.HTTPError as error:
+    if error.code == 404:
+        print(f"Release {args.tag} not found in {args.repo}. Skipping changelog generation.")
+        sys.exit(0)
+    print(f"GitHub API responded with a {error.code} error!", file=sys.stderr)
+    print("Url:", url, file=sys.stderr)
+    print("Response:", json.dumps(json.load(error), indent=4), file=sys.stderr, sep="\n")
+    sys.exit(1)
+
+release = json.load(response)
+
+releaseDate = datetime.strptime(release['published_at'], "%Y-%m-%dT%H:%M:%SZ").replace(tzinfo=timezone.utc)
+
+with tempfile.TemporaryFile("r+") as temp:
+    print("-------------------------------------------------------------------", file=temp)
+
+    print(f"{releaseDate.strftime('%a %b %d %H:%M:%S %Z %Y')}", end="", file=temp)
+    if args.author:
+        print(f" - {args.author}", end="", file=temp)
+    print("\n", file=temp)
+
+    print(f"- Release {args.tag}", end="", file=temp)
+    if release['name'] and release['name'] != args.tag:
+        print(f" - {release['name']}", end="", file=temp)
+    print("\n", file=temp)
+
+    if release['body']:
+        print(textwrap.indent(release['body'], "  "), file=temp, end="\n\n")
+    temp.seek(0)
+
+    if args.file:
+        try:
+            with open(args.file, "r") as prev:
+                old = prev.read()
+        except FileNotFoundError:
+            old = ""
+        with open(args.file, "w") as new:
+            for line in temp:
+                new.write(line)
+            new.write(old)
+        sys.exit(0)
+
+    print(temp.read())