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|
#!/usr/bin/python
# -*- coding: utf-8 -*-
#
# Create a Baserock .lorry file for a given Perl distribution
#
# Copyright © 2015 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.
from __future__ import print_function
import json
import logging
import os
import sys
import requests
import urlparse
import re
import subprocess
from importer_base import ImportException, ImportExtension, WebServiceClient
import utils
class GenerateLorryException(ImportException):
def __init__(self, msg):
s = "Couldn't generate lorry: %s" % msg
super(GenerateLorryException, self).__init__(s)
METACPAN_URL = 'http://api.metacpan.org/v0'
NO_RELEASE_ERRMSG = ("Couldn't find a release of distribution `%s' "
"with version `%s'")
NO_DOWNLOAD_URL_ERRMSG = ("Couldn't get download url for distribution `%s' "
"with version `%s': "
"server returned unexpected response")
class CPANLorryGenerator(ImportExtension):
def __init__(self):
super(CPANLorryGenerator, self).__init__()
# FIXME: post requests don't seem to work with requests_cache
# fails with
# "TypeError: request() got an unexpected keyword argument 'json'"
#self.apiclient = WebServiceClient('cpan_api_cache')
def search_for_url_match(self, dist_name, dist_version):
''' If we don't get a hit we can try an alternative query,
get all download_urls and hope they follow a convention
that can be extracted with CPAN::DistnameInfo '''
q = {"query": { "filtered":{
"query":{"match_all":{}},
"filter":{
"term":{"release.distribution": dist_name}
}
}},
"fields": ["download_url"]}
def extensions_dir():
return os.path.dirname(__file__)
query_url = METACPAN_URL + '/release/_search'
r = requests.post(query_url, json=q)
r.raise_for_status()
hits = r.json()['hits']
logging.debug("Got %s hits", hits['total'])
if hits['total'] == 0:
return None
for hit in hits['hits']:
logging.debug('hit: %s', hit)
download_url = hit['fields']['download_url']
r = re.match('https?://cpan.metacpan.org/(.*)', download_url)
if not r:
return None
pathname = r.groups(0)[0]
exepath = os.path.join(extensions_dir(),
'pathname2distinfo.pl')
dist_info = json.loads(subprocess.check_output([exepath,
pathname]))
logging.debug("Dist info: %s", dist_info)
if dist_info.get('version') == dist_version:
return download_url
return None
def get_tarball_url(self, dist_name, dist_version):
if dist_version is None:
r = requests.get(METACPAN_URL + '/release/' + dist_name)
r.raise_for_status()
return r.json().get('download_url')
q = {"query": { "filtered":{
"query":{"match_all":{}},
"filter":{"and":[
{"term":{"release.distribution": dist_name}},
{"term":{"release.version": dist_version}}
]}
}},
"fields": ["download_url"]}
# TODO: use apiclient
query_url = METACPAN_URL + '/release/_search'
r = requests.post(query_url, json=q)
r.raise_for_status()
logging.debug('r.json(): %s', r.json())
hits = r.json()['hits']['total']
if hits == 0:
download_url = self.search_for_url_match(dist_name, dist_version)
if download_url is None:
raise GenerateLorryException(NO_RELEASE_ERRMSG
% (dist_name, dist_version))
else:
try:
fields = r.json()['hits']['hits'][0]['fields']
download_url = fields['download_url']
except KeyError:
raise GenerateLorryException(NO_DOWNLOAD_URL_ERRMSG
% (dist_name, dist_version))
return download_url
def process_args(self, args):
if len(args) not in (1, 2):
raise ImportException('usage: %s NAME [VERSION]' % sys.argv[0])
dist_name = args[0]
dist_version = args[1] if len(args) == 2 else None
logging.info('Generating tarball lorry')
pathname = None
metadata_path = os.environ.get('IMPORT_METAPATH')
# metadata passed through IMPORT_METAPATH may already contain
# the distribution pathname, which we can use for lorrying,
# if this is the case then there's no need to query metacpan.
if metadata_path:
logging.debug('Got metadata path: %s', metadata_path)
try:
with open(metadata_path) as f:
pathname = (json.load(f)['cpan']
['dist-meta'][dist_name]['pathname'])
logging.debug('got pathname: %s', pathname)
except (KeyError, ValueError, IOError) as e:
logging.debug('Following exception can be safely ignored')
logging.exception(e)
# we will fallback to querying cpan
# if we don't have the pathname in the metadata
pass
if pathname:
logging.debug("Taking pathname `%s' from parent metadata",
pathname)
url = 'http://cpan.metacpan.org/authors/id/%s' % pathname
else:
logging.debug("Querying metacpan for lorry details for %s %s",
dist_name, dist_version)
try:
url = self.get_tarball_url(dist_name, dist_version)
except requests.exceptions.RequestException as e:
raise GenerateLorryException('got %s while fetching %s'
% (e, e.request.url))
lorry = utils.str_tarball_lorry('cpan', 'cpan', dist_name, url)
print(lorry)
if __name__ == '__main__':
CPANLorryGenerator().run()
|
