Add local module support to the cloudformation package command

.gitignore

@@ -47,4 +47,5 @@ doc/source/tutorial/services.rst
 
 # Pyenv
 .python-version
+.env
 

awscli/customizations/cloudformation/artifact_exporter.py

@@ -14,6 +14,7 @@
 import logging
 import os
 import tempfile
+import traceback
 import zipfile
 import contextlib
 import uuid
@@ -25,11 +26,14 @@
 from awscli.customizations.cloudformation import exceptions
 from awscli.customizations.cloudformation.yamlhelper import yaml_dump, \
     yaml_parse
+from awscli.customizations.cloudformation import modules
 import jmespath
 
 
 LOG = logging.getLogger(__name__)
 
+MODULES = "Modules"
+RESOURCES = "Resources"
 
 def is_path_value_valid(path):
     return isinstance(path, str)
@@ -591,7 +595,6 @@ def __init__(self, template_path, parent_dir, uploader,
             raise ValueError("parent_dir parameter must be "
                              "an absolute path to a folder {0}"
                              .format(parent_dir))
-
         abs_template_path = make_abs_path(parent_dir, template_path)
         template_dir = os.path.dirname(abs_template_path)
 
@@ -651,14 +654,36 @@ def export(self):
         :return: The template with references to artifacts that have been
         exported to s3.
         """
+
+        # Process modules
+        try:
+            self.template_dict = modules.process_module_section(
+                    self.template_dict, 
+                    self.template_dir)
+        except Exception as e:
+            traceback.print_exc()
+            msg=f"Failed to process Modules section: {e}"
+            raise exceptions.InvalidModuleError(msg=msg)
+
         self.template_dict = self.export_metadata(self.template_dict)
 
-        if "Resources" not in self.template_dict:
+        if RESOURCES not in self.template_dict:
             return self.template_dict
 
+        # Process modules that are specified as Resources, not in Modules
+        try:
+            self.template_dict = modules.process_resources_section(
+                    self.template_dict, 
+                    self.template_dir)
+        except Exception as e:
+            traceback.print_exc()
+            msg=f"Failed to process modules in Resources: {e}"
+            raise exceptions.InvalidModuleError(msg=msg)
+
+
         self.template_dict = self.export_global_artifacts(self.template_dict)
 
-        self.export_resources(self.template_dict["Resources"])
+        self.export_resources(self.template_dict[RESOURCES])
 
         return self.template_dict
 

awscli/customizations/cloudformation/exceptions.py

@@ -57,3 +57,9 @@ class DeployBucketRequiredError(CloudFormationCommandError):
 
 class InvalidForEachIntrinsicFunctionError(CloudFormationCommandError):
     fmt = 'The value of {resource_id} has an invalid "Fn::ForEach::" format: Must be a list of three entries'
+
+class InvalidModulePathError(CloudFormationCommandError):
+    fmt = 'The value of {source} is not a valid path to a local file'
+
+class InvalidModuleError(CloudFormationCommandError):
+    fmt = 'Invalid module: {msg}'