add changelog generating script

1 files changed, 116 insertions, 0 deletions

diff --git a/misc/generate_changelog.py b/misc/generate_changelog.py
new file mode 100755
index 0000000..1bce073
--- /dev/null
+++ b/misc/generate_changelog.py
@@ -0,0 +1,116 @@
+#!/usr/bin/env python3
+import email.utils
+import feedgenerator
+
+def parse_changelog(lines):
+	got_version = False
+	got_date = False
+	got_url = False
+	done_remarks = False
+	releases = []
+	release = {}
+	release_remarks = []
+	release_changes = []
+	current_change = ""
+
+	for idx, line in enumerate(lines):
+		line = line.rstrip()
+
+		if not got_version:
+			got_version = True
+			release["version"] = line
+			continue
+
+		if not got_date:
+			release["date"] = email.utils.parsedate_to_datetime(line)
+			got_date = True
+			continue
+
+		key, sep, val = line.partition(": ")
+		if key in ["url", "sha256", "released"] and val != "":
+			release[key] = val
+			continue
+
+		if not done_remarks:
+			if line == "":
+				done_remarks = True
+				release["remarks"] = release_remarks
+				release_remarks = []
+				continue
+			else:
+				release_remarks.append(line)
+				continue
+
+		if line != "":
+			release_changes.append(line.rstrip())
+
+			if idx + 1 != len(lines):
+				continue
+
+		release["changes"] = release_changes
+		if release.get("released") != "no":
+			releases.append(release)
+
+		got_version = False
+		got_date = False
+		done_remarks = False
+		release = {}
+		release_changes = []
+
+	return releases
+
+def generate_rss_feed(releases):
+	feed = feedgenerator.Rss201rev2Feed(
+		title="yt-dlp-rajiko changelog",
+		description="Notifications for new yt-dlp-rajiko releases, with changelogs",
+		link="https://427738.xyz/yt-dlp-rajiko/",
+		language="en-GB",
+		ttl=180,  # 3 hours
+	)
+
+	for release in releases:
+		title = "yt-dlp-rajiko " + release["version"] + " has been released"
+		description = ""
+		description += "<p>"
+		for remark in release["remarks"]:
+			description += remark
+			description += "<br/>"
+		description += "</p>"
+		description += "<p>This release:</p>\n"
+		description += "<ul>"
+		for change in release["changes"]:
+			description += "<li>"
+			description += change
+			description += "</li>\n"
+		description += "</ul></p>"
+
+		if release.get("url"):
+			if release["version"] != "1.0":
+				description += "\n<p>If you use pip, you should be able to upgrade with <code>pip install yt-dlp-rajiko --upgrade --extra-index-url https://427738.xyz/yt-dlp-rajiko/pip/</code>.<br>"
+				description += "If you installed manually, you can download the updated <code>.whl</code> from this post's link."
+				if release.get("sha256"):
+					description += " The SHA256 checksum should be <code>"
+					description += release.get("sha256")
+					description += "</code>."
+				description += "</p>"
+			else:
+				description += '\n<p>Please see <a href="https://427738.xyz/yt-dlp-rajiko/#install">the homepage</a> for initial installation instructions.</p>'
+
+		feed.add_item(
+			title=title,
+			description=description,
+			link=release.get("url"),
+			pubdate=release["date"]
+		)
+	return feed
+
+if __name__ == "__main__":
+	with open("CHANGELOG") as f:
+		releases = parse_changelog(f.readlines())
+
+	feed = generate_rss_feed(releases)
+	feed_contents = feed.writeString("utf-8")
+	feed_contents = feed_contents.replace("<rss", '<?xml-stylesheet href="rss-style.xsl" type="text/xsl"?>\n<rss')
+
+	with open('CHANGELOG.xml', 'w') as fp:
+		fp.write(feed_contents)