Always generate the lines, even in dry run.

--HG--
extra : amend_source : fa41c3fb787b667f703f67a52aed7a2958e615b4

CHANGES.txt

@@ -11,6 +11,8 @@ CHANGES
   documentation.
 * Some code refactoring and cleanup was done with no intended behavioral
   changes.
+* During install_egg_info, the generated lines for namespace package .pth
+  files are now processed even during a dry run.
 
 ---
 5.1

setuptools/command/install_egg_info.py

@@ -68,11 +68,13 @@ class install_egg_info(Command):
         filename += '-nspkg.pth'
         self.outputs.append(filename)
         log.info("Installing %s", filename)
+        lines = map(self._gen_nspkg_line, nsp)
+
         if self.dry_run:
+            # always generate the lines, even in dry run
+            list(lines)
             return
 
-        lines = map(self._gen_nspkg_line, nsp)
-
         with open(filename, 'wt') as f:
             f.writelines(lines)