moved to base class for shell plugins

fish now sets env vars correctly
fish checksum now works
fixed and cleaned up imports
fixed typo

lib/ansible/plugins/shell/csh.py

@@ -17,9 +17,9 @@
 from __future__ import (absolute_import, division, print_function)
 __metaclass__ = type
 
-from ansible.plugins.shell.sh import ShellModule as ShModule
+from ansible.plugins.shell import ShellBase
 
-class ShellModule(ShModule):
+class ShellModule(ShellBase):
 
     # Common shell filenames that this plugin handles
     COMPATIBLE_SHELLS = frozenset(('csh', 'tcsh'))
@@ -29,8 +29,12 @@ class ShellModule(ShModule):
     # How to end lines in a python script one-liner
     _SHELL_EMBEDDED_PY_EOL = '\\\n'
     _SHELL_REDIRECT_ALLNULL = '>& /dev/null'
+    _SHELL_AND = '&&'
+    _SHELL_OR = '||'
     _SHELL_SUB_LEFT = '"`'
     _SHELL_SUB_RIGHT = '`"'
+    _SHELL_GROUP_LEFT = '('
+    _SHELL_GROUP_RIGHT = ')'
 
     def env_prefix(self, **kwargs):
         return 'env %s' % super(ShellModule, self).env_prefix(**kwargs)