Change source layout

* In preparation for PEP517 transition.

Signed-off-by: Alfred Wingate <parona@protonmail.com>

src/euscan/handlers/rubygems.py

@@ -0,0 +1,75 @@
+import re
+import portage
+import json
+import urllib.request, urllib.error, urllib.parse
+
+from euscan import helpers, output, mangling
+
+HANDLER_NAME = "rubygems"
+CONFIDENCE = 100
+PRIORITY = 90
+
+
+def can_handle(pkg, url=None):
+    return url and url.startswith('mirror://rubygems/')
+
+
+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
+
+
+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 urllib.error.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