Adjust logic for plan files (version > 1.0.0)

We will no longer try to chdir into files and instead
add them as subcommands.
Includes regression test

Resolves #3 (https://gitlab.com/domaindrivenarchitecture/dda-python-terraform/-/issues/3)

dda_python_terraform/terraform.py

@@ -464,12 +464,20 @@ class Terraform:
     def _generate_default_args(self, dir_or_plan: Optional[str]) -> Sequence[str]:
         if (version.parse(self.terraform_semantic_version) < version.parse("1.0.0") and dir_or_plan):
             return [dir_or_plan]
+        elif (version.parse(self.terraform_semantic_version) >= version.parse("1.0.0") and dir_or_plan and os.path.isfile(f'{self.working_dir}/{dir_or_plan}')):
+            plan = dir_or_plan.split('/')[-1]
+            return [plan]
         else:
             return []
 
     def _generate_default_general_options(self, dir_or_plan: Optional[str]) -> Dict[str, Any]:
         if (version.parse(self.terraform_semantic_version) >= version.parse("1.0.0") and dir_or_plan):
-            return {"chdir": dir_or_plan}
+            if os.path.isdir(self.working_dir + '/' + dir_or_plan):
+                return {"chdir": dir_or_plan}
+            else:
+                plan_path = dir_or_plan.split('/')
+                dir_to_plan_path = "/".join(plan_path[:-1])
+                return {"chdir": dir_to_plan_path}
         else:
             return {}
 

test/test_terraform.py

@@ -316,6 +316,26 @@ class TestTerraform:
         assert expected_output in out.replace("\n", "").replace(" ", "")
         assert err == ""
 
+    def test_apply_plan(self):
+        # test is only applicable to version > 1.0.0
+        if version.parse(semantic_version) < version.parse("1.0.0"):
+            return
+        
+        tf = Terraform(
+            working_dir=current_path, terraform_semantic_version=semantic_version
+        )
+        out_folder = 'var_to_output'
+        out_file_name = 'test.out'
+        out_file_path = f'{out_folder}/{out_file_name}'
+        tf.init(out_folder)
+        ret, _, err = tf.plan(out_folder, detailed_exitcode=IsNotFlagged, out=out_file_name)
+        assert ret == 0
+        assert err == ""
+
+        ret, _, err = tf.apply(out_file_path, skip_plan=True)
+        assert ret == 0
+        assert err == ""
+
     def test_apply_with_var_file(self, caplog: LogCaptureFixture):
         with caplog.at_level(logging.INFO):
             tf = Terraform(working_dir=current_path, terraform_semantic_version=semantic_version)