[python-debian/master] parse "properly" deps with uppercase letters

[Stefano Zacchiroli]

in theory that kind of deps are forbidden by policy, but they do appear
in the archive. Parse them properly accordinging to the philosophy of
being lax in deb822 dependency parser
---
 debian_bundle/deb822.py  |    2 +-
 examples/deb822/depgraph |    5 ++++-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/debian_bundle/deb822.py b/debian_bundle/deb822.py
index 4a4c875..d67dcb8 100644
--- a/debian_bundle/deb822.py
+++ b/debian_bundle/deb822.py
@@ -405,7 +405,7 @@ class PkgRelation(object):
     # just parse as much as we need to split the various parts composing a
     # dependency, checking their correctness wrt policy is out of scope
     __dep_RE = re.compile( \
-            r'^\s*(?P<name>[a-z0-9.+\-]{2,})(\s*\(\s*(?P<relop>[>=<]+)\s*(?P<version>[0-9a-zA-Z:\-+~.]+)\s*\))?(\s*\[(?P<archs>[\s!\w\-]+)\])?\s*$')
+            r'^\s*(?P<name>[a-zA-Z0-9.+\-]{2,})(\s*\(\s*(?P<relop>[>=<]+)\s*(?P<version>[0-9a-zA-Z:\-+~.]+)\s*\))?(\s*\[(?P<archs>[\s!\w\-]+)\])?\s*$')
     __comma_sep_RE = re.compile(r'\s*,\s*')
     __pipe_sep_RE = re.compile(r'\s*\|\s*')
     __blank_sep_RE = re.compile(r'\s*')
diff --git a/examples/deb822/depgraph b/examples/deb822/depgraph
index 7423a48..150662c 100755
--- a/examples/deb822/depgraph
+++ b/examples/deb822/depgraph
@@ -48,7 +48,10 @@ def main():
                 emit_arc(name, or_node)
                 emit_node(or_node, 'OR')
                 for dep in deps:
-                    emit_arc(or_node, dep['name'])
+                    emit_arc(or_node, dep['name'].lower())
+                    # even though it is forbidden by policy, there are some
+                    # dependencies with upper case letter in the archive,
+                    # apparently apt-get turn them to lowercase ...
     print "}"
 
 if __name__ == '__main__':
-- 
1.5.4.2