Add gnome handler

pym/euscan/handlers/gnome.py

@@ -0,0 +1,85 @@
+# -*- coding: utf-8 -*-
+
+import re
+import urllib2
+
+try:
+    import simplejson as json
+except ImportError:
+    import json
+
+import portage
+
+from euscan import mangling, helpers, output
+
+HANDLER_NAME = "gnome"
+CONFIDENCE = 100
+PRIORITY = 90
+
+GNOME_URL_SOURCE = 'http://ftp.gnome.org/pub/GNOME/sources'
+
+def can_handle(_pkg, url=None):
+    return url and url.startswith('mirror://gnome/')
+
+
+def guess_package(cp, url):
+    match = re.search('mirror://gnome/sources/([^/]+)/.*', url)
+    if match:
+        return match.group(1)
+
+    _cat, pkg = cp.split("/")
+
+    return pkg
+
+
+def scan_url(pkg, url, options):
+    'http://ftp.gnome.org/pub/GNOME/sources/'
+    package = guess_package(pkg.cpv, url)
+    return scan_pkg(pkg, package)
+
+
+def scan_pkg(pkg, options):
+    # For some weird reasons package with no metadata 
+    # will fail without this hack
+    options = {
+        'data': options,
+        'type': 'gnome',
+    }
+    package = options['data']
+
+    output.einfo("Using Gnome json cache: " + package)
+
+    print 'Opening', '/'.join([GNOME_URL_SOURCE, package, 'cache.json'])
+    fp = urllib2.urlopen('/'.join([GNOME_URL_SOURCE, package, 'cache.json']))
+    content = fp.read()
+    fp.close()
+
+    cache = json.loads(content, encoding='ascii')
+
+    if cache[0] != 4:
+        raise Exception('Unknow cache format detected')
+
+    versions = cache[2][package]
+
+    if not versions:
+        return versions
+
+    versions.reverse()
+
+    cp, ver, _rev = portage.pkgsplit(pkg.cpv)
+
+    ret = []
+    for up_pv in versions:
+        pv = mangling.mangle_version(up_pv, options)
+        if helpers.version_filtered(cp, ver, pv):
+            continue
+        up_files = cache[1][package][up_pv]
+        for tarball_comp in ('tar.xz', 'tar.bz2', 'tar.gz'):
+            if tarball_comp in up_files:
+                url = '/'.join([GNOME_URL_SOURCE, package,
+                                 up_files[tarball_comp]])
+                break
+        else:
+            raise Exception('No tarball for release ' + up_pv)
+        ret.append((url, pv, HANDLER_NAME, CONFIDENCE))
+    return ret