Add bdist_esky command to setup.py

* Add bdist_esky command through import from esky
* Add list of explicit includes with platform detection
* Update salt build to be zip unsafe

setup.py

@@ -128,8 +128,50 @@ setup_kwargs = {'name': NAME,
                                ('share/man/man7', ['doc/man/salt.7']),
                                ],
                 'install_requires': requirements,
+                # The dynamic module loading in salt.modules makes this
+                # package zip unsafe.
+                'zip_safe': False
                 }
 
+
+# bbfreeze explicit includes
+# Sometimes the auto module traversal doesn't find everything, so we
+# explicitly add it. The auto dependency tracking especially does not work for
+# imports occurring in salt.modules, as they are loaded at salt runtime.
+# Specifying includes that don't exist doesn't appear to cause a freezing
+# error.
+freezer_includes = [
+    'zmq.core.*',
+    'zmq.utils.*',
+    'ast',
+]
+
+if sys.platform == 'win32':
+    freezer_includes.extend([
+        'win32con',
+        'win32security',
+        'ntsecuritycon'
+    ])
+elif sys.platform.startswith('linux'):
+    freezer_includes.extend([
+        'yum'
+    ])
+
+if 'bdist_esky' in sys.argv:
+    # Add the esky bdist target if the module is available
+    # may require additional modules depending on platform
+    from esky import bdist_esky
+    # bbfreeze chosen for its tight integration with distutils
+    import bbfreeze
+    options = setup_kwargs.get('options', {})
+    options['bdist_esky'] = {
+         "freezer_module": "bbfreeze",
+         "freezer_options": {
+             "includes": freezer_includes
+         }
+    }
+    setup_kwargs['options'] = options
+
 if with_setuptools:
     setup_kwargs['entry_points'] = {
         "console_scripts": ["salt-master = salt.scripts:salt_master",