Description: Add some basic support for use in Ubuntu
Author: James Page <james.page@ubuntu.com>

--- a/pydist/generate_fallback_list.py
+++ b/pydist/generate_fallback_list.py
@@ -21,12 +21,16 @@
 
 import re
 import sys
+from distro_info import DistroInfo
 from gzip import decompress
 from os import chdir, mkdir
 from os.path import dirname, exists, isdir, join, split
 from urllib.request import urlopen
 
-SOURCE = 'http://ftp.debian.org/debian/dists/unstable/main/Contents-amd64.gz'
+UBUNTU_SOURCE = 'http://archive.ubuntu.com/ubuntu/dists/%s/Contents-amd64.gz' \
+    % DistroInfo('ubuntu').devel()
+DEBIAN_SOURCE = 'http://ftp.debian.org/debian/dists/unstable/main/Contents-amd64.gz'
+
 IGNORED_PKGS = {'python-setuptools', 'python3-setuptools', 'pypy-setuptools'}
 DEFAULTS = {
     'cpython2': [
@@ -60,6 +64,7 @@ public_egg = re.compile(r'''
 ''', re.VERBOSE).match
 
 skip_sensible_names = True if '--skip-sensible-names' in sys.argv else False
+SOURCE = DEBIAN_SOURCE if '--ubuntu' not in sys.argv else UBUNTU_SOURCE
 
 chdir(dirname(__file__))
 if isdir('../dhpython'):
@@ -72,12 +77,16 @@ if not isdir('cache'):
     mkdir('cache')
 cache_fpath = join('cache', split(SOURCE)[-1])
 if not exists(cache_fpath):
+    print("Retrieving Contents from %s" % SOURCE)
     data = urlopen(SOURCE).read()
     with open(cache_fpath, 'wb') as fp:
         fp.write(data)
 else:
     data = open(cache_fpath, 'rb').read()
-data = str(decompress(data), encoding='UTF-8')
+try:
+    data = str(decompress(data), encoding='UTF-8')
+except UnicodeDecodeError:
+    data = str(decompress(data), encoding='ISO-8859-15')
 
 result = {
     'cpython2': {},
@@ -90,7 +99,12 @@ for line in data.splitlines():
         if line.startswith('FILE'):
             is_header = False
         continue
-    path, desc = line.rsplit(maxsplit=1)
+    try:
+        path, desc = line.rsplit(maxsplit=1)
+    except ValueError:
+        # NOTE(jamespage) some lines in Ubuntu are not
+        #                 parseable.
+        continue
     path = '/' + path.rstrip()
     section, pkg_name = desc.rsplit('/', 1)
     if pkg_name in IGNORED_PKGS:
--- a/pydist/Makefile
+++ b/pydist/Makefile
@@ -1,12 +1,14 @@
 #!/usr/bin/make -f
 
+FALLBACK_FLAGS = $(shell dpkg-vendor --is ubuntu && echo "--ubuntu")
+
 clean:
 	rm -rf cache
 	#rm -f dist_fallback
 	rm -f README.PyDist.html
 
 dist_fallback:
-	python3 ./generate_fallback_list.py
+	python3 ./generate_fallback_list.py $(FALLBACK_FLAGS)
 
 README.PyDist.html: README.PyDist
 	rst2html $< $@