Add PlatformTerraformManifestGenerator class

dbt_platform_helper/domain/terraform_environment.py

@@ -5,6 +5,35 @@
 from dbt_platform_helper.utils.template import setup_templates
 
 
+class PlatformTerraformManifestGenerator:
+    def __init__(self):
+        self.manifest_template = setup_templates().get_template("environments/main.tf")
+
+    def generate_manifest(
+        self,
+        application_name: str,
+        environment_name: str,
+        environment_config,
+        terraform_platform_modules_version_override=None,
+    ):
+        terraform_platform_modules_version = (
+            terraform_platform_modules_version_override
+            or environment_config.get("versions", {}).get(
+                "terraform-platform-modules", DEFAULT_TERRAFORM_PLATFORM_MODULES_VERSION
+            )
+        )
+        print(environment_config)
+
+        return self.manifest_template.render(
+            {
+                "application": application_name,
+                "environment": environment_name,
+                "config": environment_config,
+                "terraform_platform_modules_version": terraform_platform_modules_version,
+            }
+        )
+
+
 class TerraformEnvironment:
     def __init__(self, config_provider, echo_fn=click.echo):
         self.echo = echo_fn

dbt_platform_helper/domain/test_terraform_manifest_generator.py

@@ -0,0 +1,28 @@
+from dbt_platform_helper.domain.terraform_environment import (
+    PlatformTerraformManifestGenerator,
+)
+
+
+class TestTerraformManifestGenerator:
+    def test_generator_generates_expected_manifest_content_with_version_override(self):
+        test_environment_config = {
+            "vpc": "vpc3",
+            "accounts": {
+                "deploy": {"name": "non-prod-acc", "id": "1122334455"},
+                "dns": {"name": "non-prod-dns-acc", "id": "6677889900"},
+            },
+            "versions": {"terraform-platform-modules": 3},
+        }
+        expected_header = "# WARNING: This is an autogenerated file, not for manual editing."
+        expected_modules = "git::https://github.com/uktrade/terraform-platform-modules.git//extensions?depth=1&ref=123456"
+        expected_moved_block = (
+            "moved {\n  from = module.extensions-tf\n  to   = module.extensions\n}\n"
+        )
+
+        result = PlatformTerraformManifestGenerator().generate_manifest(
+            "test-app", "test", test_environment_config, 123456
+        )
+
+        assert expected_header in result
+        assert expected_modules in result
+        assert expected_moved_block in result