feature(cli) - Support package as an alias for the submit --dry-run argument in the cfn-cli (#913)

* Initial attempt at package argument

* Updated help discription for package

* Added tests for package argument

* Clarify that it is minimum and maximum length in subproperty and hooks docs

* Revert "Clarify that it is minimum and maximum length in subproperty and hooks docs"

This reverts commit 6fd5662.

* Update README to include package command

* remove unnecessary argument for test

* Add empty profile name argument for package command

* update test for profile_name parameter

Author: mmaeng

README.md

@@ -46,6 +46,14 @@ cfn submit --dry-run #prepares schema handler package without submitting for reg
 cfn submit --set-default # if successfully registered, set submitted version to be the new default version
 ```
 
+### Command: package
+
+This is to create a schema handler package without submitting equivalent to `cfn submit --dry-run`
+
+```bash
+cfn package
+```
+
 ### Command: test
 
 To run the contract tests for a resource type, use the `test` command.

src/rpdk/core/cli.py

@@ -16,6 +16,7 @@
 from .generate import setup_subparser as generate_setup_subparser
 from .init import setup_subparser as init_setup_subparser
 from .invoke import setup_subparser as invoke_setup_subparser
+from .package import setup_subparser as package_setup_subparser
 from .submit import setup_subparser as submit_setup_subparser
 from .test import setup_subparser as test_setup_subparser
 from .validate import setup_subparser as validate_setup_subparser
@@ -89,7 +90,9 @@ def no_command(args):
         invoke_setup_subparser(subparsers, parents)
         unittest_patch_setup_subparser(subparsers, parents)
         build_image_setup_subparser(subparsers, parents)
+        package_setup_subparser(subparsers, parents)
         extensions_setup_subparser(subparsers, parents)
+
         args = parser.parse_args(args=args_in)
 
         setup_logging(args.verbose)

src/rpdk/core/package.py

@@ -0,0 +1,28 @@
+"""This is the same as cfn submit --dryrun, it will create a local package without uploading.
+
+Projects can be created via the 'init' sub command.
+"""
+import logging
+
+from .project import Project
+
+LOG = logging.getLogger(__name__)
+
+
+def package(_args):
+    project = Project()
+    project.load()
+    project.submit(
+        dry_run=True,
+        endpoint_url=False,
+        region_name=False,
+        role_arn=False,
+        use_role=False,
+        set_default=False,
+        profile_name=False,
+    )
+
+
+def setup_subparser(subparsers, parents):
+    parser = subparsers.add_parser("package", description=__doc__, parents=parents)
+    parser.set_defaults(command=package)

tests/test_package.py

@@ -0,0 +1,22 @@
+from unittest.mock import Mock, patch
+
+from rpdk.core.cli import main
+from rpdk.core.project import Project
+
+
+def test_package_command_valid_schema():
+    mock_project = Mock(spec=Project)
+
+    with patch("rpdk.core.package.Project", autospec=True, return_value=mock_project):
+        main(args_in=["package"])
+
+    mock_project.load.assert_called_once()
+    mock_project.submit.assert_called_once_with(
+        dry_run=True,
+        endpoint_url=False,
+        region_name=False,
+        role_arn=False,
+        use_role=False,
+        set_default=False,
+        profile_name=False,
+    )