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#!/usr/bin/env python3
#
# This hook script is run by gitdeployer when the code is
# deployed to a server. figure out which templates have been
# modified and queue automatic purges for them.
# Gitdeployer will pass a list of all modified files on
# stdin.
import sys
import os
import hashlib
from configparser import ConfigParser
import psycopg2
# Templates that we don't want to ban automatically
BANNED_TEMPLATES = (
'base/base.html',
)
if __name__ == "__main__":
config = ConfigParser()
config.read(os.path.join(os.path.abspath(os.path.dirname(__file__)), 'purgehook.ini'))
conn = psycopg2.connect(config.get('db', 'dsn'))
curs = conn.cursor()
for l in sys.stdin:
if '--static' in sys.argv:
# For the static files part, we always purge just on filename, with a prefix
curs.execute("SELECT varnish_purge('^/files/' || %(u)s || '$')", {
'u': l.strip(),
})
# If the purge is for documentation PDF, also purge the xkey for docs pdfs,
# so we update the list of which are available.
if l.startswith('documentation/pdf/'):
curs.execute("SELECT varnish_purge_xkey('pgdocs_pdf')")
elif l.startswith('templates/'):
# On regular website, if it's a template do an xkey purge of all pages using that template
tmpl = l[len('templates/'):].strip()
if tmpl not in BANNED_TEMPLATES:
curs.execute("SELECT varnish_purge_xkey(%(key)s)", {
'key': 'pgwt_{0}'.format(hashlib.md5(tmpl.encode('ascii')).hexdigest()),
})
elif l.startswith('media/'):
# For media we can't xkey, but the URL is exact so we can
# use a classic single-url purge.
curs.execute("SELECT varnish_purge('^/' || %(u)s || '$')", {
'u': l.strip(),
})
conn.commit()
conn.close()
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