Provide support to install platform extensions (sonic-net#1578)

cisco-8000 : show commands support as plugins
show platform idprom
show platform inventory

show/main.py

@@ -57,7 +57,6 @@
 from . import warm_restart
 from . import plugins
 
-
 # Global Variables
 PLATFORM_JSON = 'platform.json'
 HWSKU_JSON = 'hwsku.json'
@@ -1676,12 +1675,10 @@ def ztp(status, verbose):
        cmd = cmd + " --verbose"
     run_command(cmd, display_cmd=verbose)
 
-
 # Load plugins and register them
 helper = util_base.UtilHelper()
 for plugin in helper.load_plugins(plugins):
     helper.register_plugin(plugin, cli)
 
-
 if __name__ == '__main__':
     cli()

show/platform.py

@@ -134,7 +134,6 @@ def temperature():
     cmd = 'tempershow'
     clicommon.run_command(cmd)
 
-
 # 'firmware' subcommand ("show platform firmware")
 @platform.command(
     context_settings=dict(

show/plugins/cisco-8000.py

@@ -0,0 +1,36 @@
+#!/usr/bin/env python
+#########################################################
+# Copyright 2021 Cisco Systems, Inc.
+# All rights reserved.
+#
+# CLI Extensions for show command
+#########################################################
+
+try:
+    import click
+    import yaml
+    from show import platform
+    from sonic_py_common import device_info
+    import utilities_common.cli as clicommon
+except ImportError as e:
+    raise ImportError("%s - required module not found" % str(e))
+
+PLATFORM_PY = '/opt/cisco/bin/platform.py'
+
+@click.command()
+def inventory():
+    """Show Platform Inventory"""
+    args = [ PLATFORM_PY, 'inventoryshow' ]
+    clicommon.run_command(args)
+
+@click.command()
+def idprom():
+    """Show Platform Idprom Inventory"""
+    args = [ PLATFORM_PY, 'idprom' ]
+    clicommon.run_command(args)
+
+def register(cli):
+    version_info = device_info.get_sonic_version_info() 
+    if (version_info and version_info.get('asic_type') == 'cisco-8000'):
+        cli.commands['platform'].add_command(inventory)
+        cli.commands['platform'].add_command(idprom)