euscan-ng/pym/euscan/handlers/rubygems.py

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import re
import portage
import json
import urllib2
from euscan import helpers, output, mangling
HANDLER_NAME = "rubygems"
CONFIDENCE = 100
PRIORITY = 90
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def can_handle(pkg, url=None):
return url and url.startswith('mirror://rubygems/')
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def guess_gem(cpv, url):
match = re.search('mirror://rubygems/(.*).gem', url)
if match:
cpv = 'fake/%s' % match.group(1)
ret = portage.pkgsplit(cpv)
if not ret:
return None
cp, ver, rev = ret
cat, pkg = cp.split("/")
return pkg
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def scan_url(pkg, url, options):
'http://guides.rubygems.org/rubygems-org-api/#gemversion'
gem = guess_gem(pkg.cpv, url)
if not gem:
output.eerror("Can't guess gem name using %s and %s" % \
(pkg.cpv, url))
return []
output.einfo("Using RubyGem API: %s" % gem)
return scan_pkg(pkg, {'data': gem})
def scan_pkg(pkg, options):
gem = options['data']
url = 'http://rubygems.org/api/v1/versions/%s.json' % gem
try:
fp = helpers.urlopen(url)
except urllib2.URLError:
return []
except IOError:
return []
if not fp:
return []
data = fp.read()
versions = json.loads(data)
cp, ver, rev = portage.pkgsplit(pkg.cpv)
ret = []
for version in versions:
up_pv = version['number']
pv = mangling.mangle_version(up_pv, options)
if helpers.version_filtered(cp, ver, pv):
continue
url = 'http://rubygems.org/gems/%s-%s.gem' % (gem, up_pv)
url = mangling.mangle_url(url, options)
ret.append((url, pv, HANDLER_NAME, CONFIDENCE))
return ret