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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 cliapp
import json
import urllib2
import urlparse
class ResolveRefError(cliapp.AppException):
def __init__(self, repo_name, ref):
cliapp.AppException.__init__(
self, 'Failed to resolve ref %s for repo %s' %
(ref, repo_name))
class ResolveRefsError(cliapp.AppException):
def __init__(self, tuples):
cliapp.AppException.__init__(
self, 'Failed to resolve refs: %s' % tuples)
class CatFileError(cliapp.AppException):
def __init__(self, repo_name, ref, filename):
cliapp.AppException.__init__(
self, 'Failed to cat file %s in ref %s of repo %s' %
(filename, ref, repo_name))
class LsTreeError(cliapp.AppException):
def __init__(self, repo_name, ref):
cliapp.AppException.__init__(
self, 'Failed to list tree in ref %s of repo %s' %
(ref, repo_name))
class RemoteRepoCache(object):
def __init__(self, server_url, resolver):
self.server_url = server_url
self._resolver = resolver
def resolve_ref(self, repo_name, ref):
repo_url = self._resolver.pull_url(repo_name)
try:
return self._resolve_ref_for_repo_url(repo_url, ref)
except:
raise ResolveRefError(repo_name, ref)
def resolve_refs(self, tuples):
pull_urls = [self._resolver.pull_url(repo) for repo, ref in tuples]
try:
return self._resolve_refs_for_repo_urls(tuples, pull_urls)
except:
raise ResolveRefsError(tuples)
def cat_file(self, repo_name, ref, filename):
repo_url = self._resolver.pull_url(repo_name)
try:
return self._cat_file_for_repo_url(repo_url, ref, filename)
except:
raise CatFileError(repo_name, ref, filename)
def ls_tree(self, repo_name, ref):
repo_url = self._resolver.pull_url(repo_name)
try:
info = json.loads(self._ls_tree_for_repo_url(repo_url, ref))
return info['tree'].keys()
except:
raise LsTreeError(repo_name, ref)
def _resolve_ref_for_repo_url(self, repo_url, ref): # pragma: no cover
data = self._make_request('sha1s?repo=%s&ref=%s' % (repo_url, ref))
info = json.loads(data)
return info['sha1'], info['tree']
def _resolve_refs_for_repo_urls(self, tuples, urls): # pragma: no cover
request_data = []
for n in xrange(0, len(tuples)):
request_data.append({'repo': urls[n], 'ref': tuples[n][1]})
response_data = self._make_post_request('sha1s', request_data)
data = {}
for n in xrange(0, len(tuples)):
data[tuples[n]] = {
'repo': tuples[n][0],
'repo-url': response_data[n]['repo'],
'ref': response_data[n]['ref'],
}
if 'error' in resonse_data[n]:
data[tuples[n]]['error'] = response_data[n]['error']
else:
data[tuples[n]]['sha1'] = response_data[n]['sha1']
data[tuples[n]]['tree'] = response_data[n]['tree']
return data
def _cat_file_for_repo_url(self, repo_url, ref,
filename): # pragma: no cover
return self._make_request(
'files?repo=%s&ref=%s&filename=%s' % (repo_url, ref, filename))
def _ls_tree_for_repo_url(self, repo_url, ref): # pragma: no cover
return self._make_request('trees?repo=%s&ref=%s' % (repo_url, ref))
def _make_request(self, path): # pragma: no cover
server_url = self.server_url
if not server_url.endswith('/'):
server_url += '/'
url = urlparse.urljoin(server_url, '/1.0/%s' % path)
handle = urllib2.urlopen(url)
return handle.read()
def _make_post_request(self, path, data): # pragma: no cover
server_url = self.server_url
if not server_url.endswith('/'):
server_url += '/'
url = urlparse.urljoin(server_url, '/1.0/%s' % path)
handle = urllib2.urlopen(url, data)
return handle.read()
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