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# Copyright (C) 2012 Codethink Limited
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import os
import urlparse
import urllib2
import string
import morphlib
from morphlib.git import Treeish
gitscheme=["git",]
urlparse.uses_relative.extend(gitscheme)
urlparse.uses_netloc.extend(gitscheme)
urlparse.uses_params.extend(gitscheme)
urlparse.uses_query.extend(gitscheme)
urlparse.uses_fragment.extend(gitscheme)
_valid_chars = string.digits + string.letters + ':%_'
def quote_url(url):
transl = lambda x: x if x in _valid_chars else '_'
return ''.join([transl(x) for x in url])
class SourceNotFound(Exception):
def __init__(self, repo, ref):
Exception.__init__(self, 'No source found at %s:%s' % (repo, ref))
class SourceManager(object):
def __init__(self, cachedir, app):
self.source_cache_dir = cachedir
self.msg = app.msg
self.settings = app.settings
def _get_git_cache(self, repo):
name = quote_url(repo)
location = self.source_cache_dir + '/' + name
if os.path.exists(location):
return True, location
success = False
self.msg('Making sure we have a local cache of the git repo')
bundle = None
if self.settings.has_key('bundle-server'):
bundle_server = self.settings['bundle-server']
if not bundle_server.endswith('/'):
bundle_server += '/'
self.msg("Using bundle server %s, looking for bundle for %s" %
(bundle_server, name))
bundle = name + ".bndl"
lookup_url = urlparse.urljoin(bundle_server, bundle)
self.msg('Checking for bundle %s' % lookup_url)
req = urllib2.Request(lookup_url)
try:
urllib2.urlopen(req)
self._wget(lookup_url)
bundle = self.source_cache_dir + '/' + bundle
except urllib2.URLError:
self.msg("Unable to find bundle %s on %s" %
(bundle, bundle_server))
bundle = None
try:
if bundle:
self.msg("initialising git repo at %s" % location)
morphlib.git.init(location)
self.msg("extracting bundle %s into %s" % (bundle, location))
morphlib.git.extract_bundle(location, bundle)
self.msg("adding origin %s" % repo)
morphlib.git.add_remote(location,'origin', repo)
else:
self.msg("cloning %s into %s" % (repo, location))
morphlib.git.clone(location, repo)
success = True
except morphlib.execute.CommandFailure:
success = False
return success, location
def _wget(self,url): # pragma: no cover
ex = morphlib.execute.Execute(self.source_cache_dir, msg=self.msg)
ex.runv(['wget', '-c', url])
def get_treeish(self, repo, ref):
'''Returns a Treeish for a URL or repo name with a given reference.
If the source hasn't been cloned yet, this will fetch it, either using
clone or by fetching a bundle.
Raises morphlib.git.InvalidTreeish if the reference cannot be found.
Raises morphlib.sourcemanager.SourceNotFound if source cannot be found.
'''
self.msg('checking cache for git %s|%s' % (repo, ref))
#TODO is it actually an error to have no base url?
base_urls = self.settings['git-base-url']
success = False;
for base_url in base_urls:
if success:
self.msg("success!")
break
self.msg("looking in base url %s" % base_url)
if not base_url.endswith('/'):
base_url += '/'
full_repo = urlparse.urljoin(base_url, repo)
self.msg('cache git base_url=\'%s\' full repo url=\'%s\'' %
(base_url,full_repo))
success, gitcache = self._get_git_cache(full_repo);
if not success:
raise SourceNotFound(repo,ref)
self.msg("creating treeish for %s ref %s" % (gitcache,ref))
treeish = Treeish(gitcache, ref, self.msg)
return treeish
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