Initial support for github downloads.

Right now, it just handles ebuilds using mirror://github.

pym/euscan/handlers/__init__.py

@@ -1,6 +1,6 @@
-from euscan.handlers import generic, php, pypi, rubygem, kde, cpan
+from euscan.handlers import generic, php, pypi, rubygem, kde, cpan, github
 
-handlers = [kde, php, pypi, rubygem, cpan, generic]
+handlers = [kde, php, pypi, rubygem, cpan, github, generic]
 
 
 def find_best_handler(cpv, url):

pym/euscan/handlers/github.py

@@ -0,0 +1,51 @@
+import json, urllib2
+import re
+
+import portage
+
+from euscan import helpers, output
+
+HANDLER_NAME = "github"
+CONFIDENCE = 100.0
+
+def can_handle(cpv, url):
+    return url.startswith('mirror://github/')
+
+def guess_package(cp, url):
+    match = re.search('^mirror://github/(.*?)/(.*?)/(.*)$', url)
+
+    assert(match)
+    return (match.group(1), match.group(2), match.group(3))
+
+def scan(cpv, url):
+    'http://developer.github.com/v3/repos/downloads/'
+
+    user, project, filename = guess_package(cpv, url)
+
+    # find out where version is expected to be found
+    cp, ver, rev = portage.pkgsplit(cpv)
+    if ver not in filename:
+        return
+
+    # now create a filename-matching regexp
+    # XXX: supposedly replace first with (?P<foo>...)
+    # and remaining ones with (?P=foo)
+    fnre = re.compile('^%s$' % re.escape(filename).replace(re.escape(ver), '(.*?)'))
+
+    output.einfo("Using github API for: " + '/'.join(package))
+
+    dlreq = urllib2.urlopen('https://api.github.com/repos/%s/%s/downloads' % (user, project))
+    dls = json.load(dlreq)
+
+    for dl in dls:
+        m = fnre.match(dl['name'])
+
+        if m:
+            pv = helpers.gentoo_mangle_version(m.group(1))
+            if helpers.version_filtered(cp, ver, pv):
+                continue
+            yield ('mirror://github/%s' % dl['name'],
+                    pv, HANDLER_NAME, CONFIDENCE)
+
+def brute_force(cpv, url):
+    return []