Added capability to deploy PostgreSQL servers on Amazon RDS. Fixes #7177

web/pgacloud/pgacloud.py

@@ -0,0 +1,96 @@
+#!/usr/bin/env python3
+
+##########################################################################
+#
+# pgAdmin 4 - PostgreSQL Tools
+#
+# Copyright (C) 2013 - 2022, The pgAdmin Development Team
+# This software is released under the PostgreSQL Licence
+#
+##########################################################################
+
+import argparse
+import os
+
+
+def load_providers():
+    """ Loads all the providers """
+    providers = {}
+
+    path = os.path.dirname(os.path.realpath(__file__))
+    modules = os.listdir(path + '/providers')
+
+    for filename in modules:
+        filename = path + '/providers/' + filename
+
+        if os.path.isfile(filename):
+            basename = os.path.basename(filename)
+            base, extension = os.path.splitext(basename)
+
+            if extension == ".py" and not basename.startswith("_"):
+                module = __import__("providers." + basename[:-3],
+                                    fromlist=["providers"])
+                provider = module.load()
+                providers[basename[:-3]] = provider
+
+    return providers
+
+
+def get_args(providers):
+    """ Creates the parsers and returns the args """
+    # Create the top-level parser
+    parser = argparse.ArgumentParser(prog='pgacloud.py')
+    parser.add_argument('--debug', action=argparse.BooleanOptionalAction,
+                        default=True, help='send debug messages to stderr')
+
+    # Create the provider sub-parser
+    parsers = parser.add_subparsers(help='provider help', dest='provider')
+
+    # Load the provider parsers
+    for provider in providers:
+        providers[provider].init_args(parsers)
+
+    args = parser.parse_args()
+
+    return parser, args
+
+
+def execute_command(providers, parser, args):
+    """ Executes the command in the provider """
+
+    # Switch - for _ in command names. We use - in the CLI syntax for ease of
+    # use, but we need an _ in Python function names
+    if 'command' in args and args.command is not None:
+        args.command = args.command.replace('-', '_')
+
+    # Figure out what provider the command was for (if any) and call the
+    # relevant function. If we don't get a match, print the help
+    if args.provider in providers and \
+            'command' in args and \
+            args.command is not None:
+        command = providers[args.provider].commands()[args.command]
+        command(args)
+    else:
+        # If no provider has been given, display the top level help,
+        # otherwise, call the help() method in the provider
+        if args.provider is None:
+            parser.print_help()
+        else:
+            command = providers[args.provider].commands()['help']
+            command()
+
+
+def main():
+    """ Entry point """
+    # Load the providers
+    providers = load_providers()
+
+    # Get the args
+    parser, args = get_args(providers)
+
+    # Execute the command
+    execute_command(providers, parser, args)
+
+
+if __name__ == '__main__':
+    main()