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#!/usr/bin/env python3
# script to generate an atom feed from CHANGES.md
import re
from datetime import datetime, timezone, time
release = re.compile("^## Release ([0-9]+\\.[0-9]+\\.[0-9]+) - ([0-9]+-[0-9]+-[0-9]+)$")
title = "ubox MXS lib releases"
base_url = "https://www.usebox.net/jjm/ubox-msx-lib/changes.html"
release_url = "https://git.usebox.net/ubox-msx-lib/tag/"
feed_file = "releases.xml"
author = "jjm"
tz = timezone.utc
def get_entries(changes):
entries = []
with open(changes, "rt") as fd:
lines = fd.readlines()
i = 0
while i < len(lines):
line = lines[i]
m = release.match(line)
if m:
version = m.group(1)
# because timezones and summer time, use 1am
updated_on = datetime.combine(
datetime.fromisoformat(m.group(2)), time(1, 0, 0)
).astimezone(tz)
body = ""
i += 1
while i < len(lines) and (lines[i] == "" or lines[i][0] != "#"):
body += lines[i]
i += 1
entries.append(dict(version=version, updated_on=updated_on, body=body))
else:
i += 1
entries.sort(key=lambda o: o["updated_on"], reverse=True)
return entries
def to_atom(post):
return """\
<entry>
<title>{title}</title>
<link rel="alternate" href="{url}"/>
<id>{url}</id>
<updated>{updated_on}</updated>
<content type="xhtml">
<div xmlns="http://www.w3.org/1999/xhtml">
<pre>{body}</pre>
<p>Download available at <a href="{release_url}?h={version}">ubox MSX lib website</a>.</p>
</div>
</content>
</entry>\n""".format(
title="Released ubox MSX lib " + post["version"],
url=base_url + "#release-" + post["version"] + "---" + post["updated_on"].date().isoformat(),
version=post["version"],
release_url=release_url,
updated_on=post["updated_on"].isoformat(),
body=post["body"].rstrip() + "\n",
)
def gen_atom(entries):
updated_on = datetime(1900, 1, 1, tzinfo=tz)
posts_atom = []
for post in entries:
if post["updated_on"] > updated_on:
updated_on = post["updated_on"]
posts_atom.append(to_atom(post))
return "\n".join(
[
"""<?xml version="1.0" encoding="utf-8"?>""",
"""<feed xmlns="http://www.w3.org/2005/Atom">""",
"""<title>%s</title>""" % title,
"""<link href="%s"/>""" % base_url,
"""<link rel="self" href="%s"/>""" % (base_url + feed_file),
"""<updated>%s</updated>""" % updated_on.isoformat(),
"""<id>%s</id>""" % base_url,
"""<author>""",
""" <name>%s</name>""" % author,
"""</author>""",
]
+ posts_atom
+ ["</feed>"]
)
def main():
entries = get_entries("../CHANGES.md")
with open(feed_file, "wt") as fd:
fd.write(gen_atom(entries))
if __name__ == "__main__":
main()
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