python-peps/pep2rss.py

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#!/usr/bin/env python
# usage: pep-hook.py $REPOS $REV
# (standard post-commit args)
import os, glob, time, datetime, stat, re, sys
import codecs
import PyRSS2Gen as rssgen
RSS_PATH = os.path.join(sys.argv[1], 'peps.rss')
def firstline_startingwith(full_path, text):
for line in codecs.open(full_path, encoding="utf-8"):
if line.startswith(text):
return line[len(text):].strip()
return None
# get list of peps with creation time (from "Created:" string in pep .txt)
peps = glob.glob('pep-*.txt')
def pep_creation_dt(full_path):
created_str = firstline_startingwith(full_path, 'Created:')
# bleh, I was hoping to avoid re but some PEPs editorialize
# on the Created line
m = re.search(r'''(\d+-\w+-\d{4})''', created_str)
if not m:
# some older ones have an empty line, that's okay, if it's old
# we ipso facto don't care about it.
# "return None" would make the most sense but datetime objects
# refuse to compare with that. :-|
return datetime.datetime(*time.localtime(0)[:6])
created_str = m.group(1)
try:
t = time.strptime(created_str, '%d-%b-%Y')
except ValueError:
t = time.strptime(created_str, '%d-%B-%Y')
return datetime.datetime(*t[:6])
peps_with_dt = [(pep_creation_dt(full_path), full_path) for full_path in peps]
# sort peps by date, newest first
peps_with_dt.sort(reverse=True)
# generate rss items for 10 most recent peps
items = []
for dt, full_path in peps_with_dt[:10]:
try:
n = int(full_path.split('-')[-1].split('.')[0])
except ValueError:
pass
title = firstline_startingwith(full_path, 'Title:')
author = firstline_startingwith(full_path, 'Author:')
url = 'http://www.python.org/dev/peps/pep-%0.4d' % n
item = rssgen.RSSItem(
title = 'PEP %d: %s' % (n, title),
link = url,
description = 'Author: %s' % author,
guid = rssgen.Guid(url),
pubDate = dt)
items.append(item)
# the rss envelope
desc = """
Newest Python Enhancement Proposals (PEPs) - Information on new
language features, and some meta-information like release
procedure and schedules
""".strip()
rss = rssgen.RSS2(
title = 'Newest Python PEPs',
link = 'http://www.python.org/dev/peps',
description = desc,
lastBuildDate = datetime.datetime.now(),
items = items)
file(RSS_PATH, 'w').write(rss.to_xml())