Change source layout

* In preparation for PEP517 transition.

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

src/euscan/handlers/github.py

@@ -0,0 +1,59 @@
+import json
+import urllib.request, urllib.error, urllib.parse
+import re
+
+import portage
+
+from euscan import helpers, output, mangling
+
+HANDLER_NAME = "github"
+CONFIDENCE = 100
+PRIORITY = 90
+
+
+def can_handle(pkg, url=None):
+    return url and url.startswith('mirror://github/')
+
+
+def guess_package(cp, url):
+    match = re.search('^mirror://github/(.*?)/(.*?)/(.*)$', url)
+
+    assert(match)
+    return (match.group(1), match.group(2), match.group(3))
+
+
+def scan_url(pkg, url, options):
+    'http://developer.github.com/v3/repos/downloads/'
+
+    user, project, filename = guess_package(pkg.cpv, url)
+
+    # find out where version is expected to be found
+    cp, ver, rev = portage.pkgsplit(pkg.cpv)
+    if ver not in filename:
+        return
+
+    # now create a filename-matching regexp
+    # XXX: supposedly replace first with (?P<foo>...)
+    # and remaining ones with (?P=foo)
+    fnre = re.compile('^%s$' % \
+                      re.escape(filename).replace(re.escape(ver), '(.*?)'))
+
+    output.einfo("Using github API for: project=%s user=%s filename=%s" % \
+                 (project, user, filename))
+
+    dlreq = urllib.request.urlopen('https://api.github.com/repos/%s/%s/downloads' % \
+                            (user, project))
+    dls = json.load(dlreq)
+
+    ret = []
+    for dl in dls:
+        m = fnre.match(dl['name'])
+
+        if m:
+            pv = mangling.mangle_version(m.group(1), options)
+            if helpers.version_filtered(cp, ver, pv):
+                continue
+
+            url = mangling.mangle_url(dl['html_url'], options)
+            ret.append((url, pv, HANDLER_NAME, CONFIDENCE))
+    return ret