#!/usr/local/bin/python 
"""
p4rss.py - generate RSS 0.91 feed
from 10 most recent changes from Perforce.
p4 changes -m 10
To run it,
	python p4rss.py > /path/to/rssfile


see sample.p4rss.xml for sample output.
For more information see p4rss.html
"""
import marshal, os, re

# begin-customization
# change the values to your Perforce URL 
public_url = 'http://public.perforce.com'
cgi_url = public_url+'/cgi-bin/p4db/changeView.cgi?CH='
maxchanges = 10
# end-of-cusotmization

p4changes = 'p4 -G changes -l -m ' + str(maxchanges)
stream = os.popen(p4changes)

# enttab borrowed from xmllib.py
enttab={'<':'&#60;', '>':'&#62;', '&':'&#38;', '"':'&#34;', '\'': '&#39;'} 
def replaceEntity(match):
    rawEntity=match.group()
    return enttab[rawEntity]
               
def escapeEntities(s):
    ent=re.compile('&|>|<|"'"|'"'')
    return ent.sub(replaceEntity, s)

print "<?xml version='1.0'?>"
print "<rss version=\"0.91\">"
print "<channel>\n\
\t<title>Most recent changes in Perforce (up to 10)</title>\n\
\t<link>%s</link>\n\
\t<language>en-US</language>\n\
\t<description>p4 changes -m 10 as RSS 0.91</description>\n" % public_url

try:
    while 1:
        dict =  marshal.load(stream)    # sys.stdin
	#p4desc = 'p4 -G describe -s ' + dict['change']
	#s = os.popen(p4desc)
	#desc = marshal.load(s)
        print "\t<item>"
        print "\t\t<title>%s</title>" % dict['change']
        print "\t\t<link>%s%s</link>"  % (cgi_url, dict['change'])
        print "\t\t<description>%s</description>" % escapeEntities(dict['desc'])
        print "\t</item>"

except EOFError: pass

print "</channel>\n\
</rss>"