[library-web] make it possible to rebuild from a renamed tarball

[Frederic Peters <fpeters src gnome org>]

commit d59a4d87a019c9be34d4089b89302de392c54f67
Author: Frédéric Péters <fpeters 0d be>
Date:   Sun Jan 26 09:30:35 2014 +0000

    make it possible to rebuild from a renamed tarball

 src/lgo.py |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/lgo.py b/src/lgo.py
index 2fe9d28..5421485 100755
--- a/src/lgo.py
+++ b/src/lgo.py
@@ -456,6 +456,8 @@ class Lgo(App):
         mtime = os.stat(filename)[stat.ST_MTIME]
 
         tarball_name = os.path.splitext(os.path.splitext(os.path.basename(filename))[0])[0]
+        if '__' in tarball_name: # taken from local cache
+            tarball_name = tarball_name.split('__')[-1]
         tarname_without_minor = re.match(r'(.*)\.\d+', tarball_name).groups()[0]
 
         # Step 0: remove old occurences of module extracts