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|
# -*- coding: utf-8 -*-
"""
fetch.py
~~~~~~~~
This module implements a Python class responsible to fetch and update
the package database and the auxiliary files.
Used only by the live version of g-octave.
:copyright: (c) 2009-2010 by Rafael Goncalves Martins
:license: GPL-2, see LICENSE for more details.
"""
from __future__ import absolute_import, print_function
__all__ = ['fetch']
from .config import Config
conf = Config(True) # fetch phase
from .exception import FetchException
from .compat import py3k, open as open_
if py3k:
import urllib.request as urllib
else:
import urllib2 as urllib
import glob
import json
import os
import re
import shutil
import subprocess
import sys
import tarfile
from contextlib import closing
def clean_db():
for f in ['info.json', 'patches', 'octave-forge']:
current = os.path.join(conf.db, f)
if os.path.isdir(current):
shutil.rmtree(current)
elif os.path.isfile(current):
os.unlink(current)
class GitHub:
re_db_mirror = re.compile(r'github://(?P<user>[^/]+)/(?P<repo>[^/]+)/?')
def __init__(self, user, repo):
self.user = user
self.repo = repo
self.api_url = 'http://github.com/api/v2/json'
self.url = 'http://github.com'
def need_update(self):
return not os.path.exists(os.path.join(
conf.db, 'cache', 'commit_id'
))
def get_commits(self, branch='master'):
url = '%s/commits/list/%s/%s/%s/' % (
self.api_url,
self.user,
self.repo,
branch
)
commits = {}
with closing(urllib.urlopen(url)) as fp:
commits = json.load(fp)
return commits['commits']
def fetch_db(self, branch='master'):
cache = os.path.join(conf.db, 'cache')
commit_id = os.path.join(cache, 'commit_id')
if not os.path.exists(cache):
os.makedirs(cache)
last_commit = self.get_commits()[0]['id']
if os.path.exists(commit_id):
with open_(commit_id) as fp:
if fp.read().strip() == last_commit:
return False
dest = os.path.join(cache, 'octave-forge-%s.tar.gz' % last_commit)
return_value = subprocess.call([
'wget',
'--continue',
'--output-document', dest,
'%s/%s/%s/tarball/%s/' % (
self.url,
self.user,
self.repo,
branch
)
])
if return_value == os.EX_OK:
with open_(os.path.join(cache, 'commit_id'), 'w') as fp:
fp.write(last_commit)
return True
def extract(self):
clean_db()
cache = os.path.join(conf.db, 'cache')
commit_id = os.path.join(cache, 'commit_id')
tarball = None
if os.path.exists(commit_id):
with open_(commit_id) as fp:
tarball = os.path.join(
cache,
'octave-forge-%s.tar.gz' % fp.read().strip()
)
if tarball is not None:
if tarfile.is_tarfile(tarball):
with closing(tarfile.open(tarball, 'r')) as fp:
fp.extractall(conf.db)
dirs = glob.glob('%s/%s-%s*' % (conf.db, self.user, self.repo))
if len(dirs) != 1:
print('Failed to extract the tarball.', file=sys.stderr)
return
for f in os.listdir(dirs[0]):
shutil.move(os.path.join(dirs[0], f), conf.db)
os.rmdir(dirs[0])
__modules__ = [
GitHub
]
def fetch():
for module in __modules__:
match = module.re_db_mirror.match(conf.db_mirror)
if match is not None:
return module(**match.groupdict())
|
GitWeb