Modifying cnos-facts, cnos_command and cnos-config in line with the design followed in Ansible. Adding unit test cases for these modules. Added plugins to support them. (#39955)

* Modifying cnos-facts, cnos_command and cnos-config in line with the design followed in Ansible. Adding unit test cases for these modules. Added plugins to support them.

* Removing doc fragment conflicts with other modules

* Replacing show with display

lib/ansible/plugins/terminal/cnos.py

@@ -0,0 +1,83 @@
+# (C) 2017 Red Hat Inc.
+# Copyright (C) 2017 Lenovo.
+#
+# GNU General Public License v3.0+
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+#
+# Contains terminal Plugin methods for ENOS Config Module
+# Lenovo Networking
+#
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+import json
+import re
+
+from ansible.errors import AnsibleConnectionFailure
+from ansible.module_utils._text import to_text, to_bytes
+from ansible.plugins.terminal import TerminalBase
+
+
+class TerminalModule(TerminalBase):
+
+    terminal_stdout_re = [
+        re.compile(br"[\r\n]?[\w+\-\.:\/\[\]]+(?:\([^\)]+\)){,3}(?:>|#) ?$"),
+        re.compile(br"\[\w+\@[\w\-\.]+(?: [^\]])\] ?[>#\$] ?$"),
+        re.compile(br">[\r\n]?")
+    ]
+
+    terminal_stderr_re = [
+        re.compile(br"% ?Error"),
+        re.compile(br"% ?Bad secret"),
+        re.compile(br"invalid input", re.I),
+        re.compile(br"(?:incomplete|ambiguous) command", re.I),
+        re.compile(br"connection timed out", re.I),
+        re.compile(br"[^\r\n]+ not found"),
+        re.compile(br"'[^']' +returned error code: ?\d+"),
+    ]
+
+    def on_open_shell(self):
+        try:
+            for cmd in (b'\n', b'terminal length 0\n'):
+                self._exec_cli_command(cmd)
+        except AnsibleConnectionFailure:
+            raise AnsibleConnectionFailure('unable to set terminal parameters')
+
+    def on_become(self, passwd=None):
+        if self._get_prompt().endswith(b'#'):
+            return
+
+        cmd = {u'command': u'enable'}
+        if passwd:
+            # Note: python-3.5 cannot combine u"" and r"" together.  Thus make
+            # an r string and use to_text to ensure it's text
+            # on both py2 and py3.
+            cmd[u'prompt'] = to_text(r"[\r\n]?password: $",
+                                     errors='surrogate_or_strict')
+            cmd[u'answer'] = passwd
+
+        try:
+            self._exec_cli_command(to_bytes(json.dumps(cmd),
+                                   errors='surrogate_or_strict'))
+        except AnsibleConnectionFailure:
+            msg = 'unable to elevate privilege to enable mode'
+            raise AnsibleConnectionFailure(msg)
+
+    def on_unbecome(self):
+        prompt = self._get_prompt()
+        if prompt is None:
+            # if prompt is None most likely the terminal is hung up at a prompt
+            return
+
+        if b'(config' in prompt:
+            self._exec_cli_command(b'end')
+            self._exec_cli_command(b'disable')
+
+        elif prompt.endswith(b'#'):
+            self._exec_cli_command(b'disable')