Sort 'pbr freeze' output

Case-insensitive sort of pbr freeze output to make the output friendly
to human eyes.

Change-Id: I314082b5c7890e3cd4a99697fc2b1868dfedbb0f

pbr/cmd/main.py

@@ -68,7 +68,9 @@ def _get_info(name):
 
 
 def freeze(args):
-    for dist in pkg_resources.working_set:
+    sorted_dists = sorted(pkg_resources.working_set,
+                          key=lambda dist: dist.project_name.lower())
+    for dist in sorted_dists:
         info = _get_info(dist.project_name)
         output = "{name}=={version}".format(**info)
         if info['sha']:

pbr/tests/base.py

@@ -128,6 +128,9 @@ class BaseTestCase(testtools.TestCase, testresources.ResourcedTestCase):
                     k.startswith('pbr_testpackage.')):
                 del sys.modules[k]
 
+    def run_pbr(self, *args, **kwargs):
+        return self._run_cmd('pbr', args, **kwargs)
+
     def run_setup(self, *args, **kwargs):
         return self._run_cmd(sys.executable, ('setup.py',) + args, **kwargs)
 

pbr/tests/test_commands.py

@@ -64,3 +64,13 @@ class TestCommands(base.BaseTestCase):
         self.addDetail('stderr', content.text_content(stderr))
         self.assertIn('Extracting rpm version', stdout)
         self.assertEqual(return_code, 0)
+
+    def test_freeze_command(self):
+        """Test that freeze output is sorted in a case-insensitive manner."""
+        stdout, stderr, return_code = self.run_pbr('freeze')
+        self.assertEqual(return_code, 0)
+        pkgs = []
+        for l in stdout.split('\n'):
+            pkgs.append(l.split('==')[0].lower())
+        pkgs_sort = sorted(pkgs[:])
+        self.assertEqual(pkgs_sort, pkgs)