Sort file lists

to generate reproducible zip files
that do not differ depending on (random) filesystem order

See https://reproducible-builds.org/ for why this matters.

setuptools/command/bdist_egg.py

@@ -303,10 +303,10 @@ def get_ext_outputs(self):
 
         paths = {self.bdist_dir: ''}
         for base, dirs, files in os.walk(self.bdist_dir):
-            for filename in files:
+            for filename in sorted(files):
                 if os.path.splitext(filename)[1].lower() in NATIVE_EXTENSIONS:
                     all_outputs.append(paths[base] + filename)
-            for filename in dirs:
+            for filename in sorted(dirs):
                 paths[os.path.join(base, filename)] = (paths[base] +
                                                        filename + '/')
 
@@ -464,9 +464,9 @@ def visit(z, dirname, names):
     if not dry_run:
         z = zipfile.ZipFile(zip_filename, mode, compression=compression)
         for dirname, dirs, files in os.walk(base_dir):
-            visit(z, dirname, files)
+            visit(z, dirname, sorted(files))
         z.close()
     else:
         for dirname, dirs, files in os.walk(base_dir):
-            visit(None, dirname, files)
+            visit(None, dirname, sorted(files))
     return zip_filename