Source: dh-python
Version: 1.20141111-2
Severity: wishlist
Tags: patch
User: reproducible-builds@lists.alioth.debian.org
Usertags: toolchain randomness
X-Debbugs-Cc: reproducible-builds@lists.alioth.debian.org

Hi,

While working on the "reproducible builds" effort [1], we have noticed
that dh-python is generating files in /usr/share/python/ns/PACKAGE with
a non-deterministic order.

The attached patch removes this non-determinism from the build system.
Once
applied, packages using namespace packages can be built reproducibly in
our
current experimental framework.

 [1]: https://wiki.debian.org/ReproducibleBuilds


Regards,

-- 
      ,''`.
     : :'  :     Chris Lamb
     `. `'`      la...@debian.org / chris-lamb.co.uk
       `-
diff --git a/dh_python2 b/dh_python2
index d02b8ab..6124423 100755
--- a/dh_python2
+++ b/dh_python2
@@ -510,7 +510,7 @@ def main():
             if not exists(dstdir):
                 os.makedirs(dstdir)
             with open(join(dstdir, package), 'a', encoding='utf-8') as fp:
-                fp.writelines("%s\n" % i for i in nsp)
+                fp.writelines("%s\n" % i for i in sorted(nsp))
 
         pyshared = join('debian', package, 'usr/share/pyshared/')
         if isdir(pyshared) and not os.listdir(pyshared):
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