Add changelog2appdata.py from flatpak

Telegram/build/changelog2appdata.py

@@ -0,0 +1,73 @@
+#!/usr/bin/env python3
+
+import re
+import datetime
+from xml.etree import ElementTree as ET
+import argparse
+
+def parse_changelog(changelog_path):
+    version_re = re.compile(r'([\d.-]+)\s+(\w+)?\s*\((\d{2}.\d{2}\.\d{2})\)')
+    entry_re = re.compile(r'-\s(.*)')
+
+    with open(changelog_path, "r") as f:
+        changelog_lines = f.read().splitlines()
+
+    releases = []
+    for l in changelog_lines:
+        version_match = version_re.match(l)
+        entry_match = entry_re.match(l)
+        if version_match is not None:
+            version, prerelease, date = version_match.groups()
+            release = (version,
+                       prerelease,
+                       datetime.datetime.strptime(date, '%d.%m.%y').date(),
+                       [])
+            releases.append(release)
+        elif entry_match is not None:
+            release[3].append(entry_match.group(1))
+
+    return releases
+
+def get_release_xml(version, prerelease, date, changes):
+    release = ET.Element("release")
+    if prerelease is None:
+        ver_str = version
+    else:
+        ver_str = f"{version}~{prerelease}"
+    release.set("version", ver_str)
+    release.set("date", date.isoformat())
+    description = ET.SubElement(release, "description")
+    changelist = ET.SubElement(description, "ul")
+    for c in changes:
+        change = ET.SubElement(changelist, "li")
+        change.text = c
+    return release
+
+def get_changelog_xml(changelog, max_items=None):
+    releases = ET.Element("releases")
+    if max_items is not None:
+        changelog = changelog[:max_items]
+    for rel in changelog:
+        release = get_release_xml(*rel)
+        releases.append(release)
+    return releases
+
+def update_appdata(appdata_path, changelog, max_items=None):
+    appdata = ET.parse(appdata_path)
+    appdata.getroot().append(
+        get_changelog_xml(changelog, max_items)
+    )
+    appdata.write(appdata_path, encoding="utf-8", xml_declaration=True)
+
+def main():
+    ap = argparse.ArgumentParser("Parse Telegram changelog")
+    ap.add_argument("-c", "--changelog-path", default="changelog.txt")
+    ap.add_argument("-a", "--appdata-path", default="lib/xdg/telegramdesktop.appdata.xml")
+    ap.add_argument("-n", "--num-releases", type=int, default=None)
+    args = ap.parse_args()
+    update_appdata(args.appdata_path,
+                   parse_changelog(args.changelog_path),
+                   max_items=args.num_releases)
+
+if __name__ == "__main__":
+    main()