Do not remove server side fields for datasources

It does not make sense to delete server side fields for datasources, the user
should be responsible for not creating loops which would cause a perpetual
diff.

This allows reading the status field for the generic `kubernetes_resource`
datasource. Thus this PR Fixes this issue :
#1699

Signed-off-by: Julien DOCHE <julien.doche@datadoghq.com>

manifest/provider/datasource.go

@@ -105,7 +105,7 @@ func (s *RawProviderServer) ReadDataSource(ctx context.Context, req *tfprotov5.R
 	}
 	rcl := client.Resource(gvr)
 
-	objectType, th, err := s.TFTypeFromOpenAPI(ctx, gvk, false)
+	objectType, th, err := s.TFTypeFromOpenAPI(ctx, gvk, true)
 	if err != nil {
 		resp.Diagnostics = append(resp.Diagnostics, &tfprotov5.Diagnostic{
 			Severity: tfprotov5.DiagnosticSeverityError,
@@ -148,8 +148,7 @@ func (s *RawProviderServer) ReadDataSource(ctx context.Context, req *tfprotov5.R
 		return resp, nil
 	}
 
-	fo := RemoveServerSideFields(res.Object)
-	nobj, err := payload.ToTFValue(fo, objectType, th, tftypes.NewAttributePath())
+	nobj, err := payload.ToTFValue(res.Object, objectType, th, tftypes.NewAttributePath())
 	if err != nil {
 		resp.Diagnostics = append(resp.Diagnostics, &tfprotov5.Diagnostic{
 			Severity: tfprotov5.DiagnosticSeverityError,

manifest/test/acceptance/datasource_resource_status_test.go

@@ -0,0 +1,84 @@
+//go:build acceptance
+// +build acceptance
+
+package acceptance
+
+import (
+	"context"
+	"testing"
+
+	"github.com/hashicorp/go-hclog"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/acctest"
+	"github.com/hashicorp/terraform-provider-kubernetes/manifest/provider"
+	"github.com/hashicorp/terraform-provider-kubernetes/manifest/test/helper/kubernetes"
+
+	tfstatehelper "github.com/hashicorp/terraform-provider-kubernetes/manifest/test/helper/state"
+)
+
+func TestDataSourceKubernetesResource_ConfigMap(t *testing.T) {
+	ctx := context.Background()
+
+	reattachInfo, err := provider.ServeTest(ctx, hclog.Default(), t)
+	if err != nil {
+		t.Errorf("Failed to create provider instance: %q", err)
+	}
+
+	name := randName()
+	namespace := randName()
+
+	k8shelper.CreateNamespace(t, namespace)
+	defer k8shelper.DeleteResource(t, namespace, kubernetes.NewGroupVersionResource("v1", "namespaces"))
+
+	// STEP 1: Create a Deployment to use as a data source
+	tf := tfhelper.RequireNewWorkingDir(ctx, t)
+	tf.SetReattachInfo(ctx, reattachInfo)
+	defer func() {
+		tf.Destroy(ctx)
+		tf.Close()
+		k8shelper.AssertNamespacedResourceDoesNotExist(t, "v1", "configmaps", namespace, name)
+	}()
+
+	tfvars := TFVARS{
+		"name":      name,
+		"namespace": namespace,
+	}
+	tfconfig := loadTerraformConfig(t, "datasource-resource-status/step1.tf", tfvars)
+	tf.SetConfig(ctx, tfconfig)
+	tf.Init(ctx)
+	tf.Apply(ctx)
+
+	k8shelper.AssertNamespacedResourceExists(t, "v1", "deployments", namespace, name)
+
+	state, err := tf.State(ctx)
+	if err != nil {
+		t.Fatalf("Failed to retrieve terraform state: %q", err)
+	}
+	tfstate := tfstatehelper.NewHelper(state)
+
+	// STEP 2: Read the Deployment from step 1 using a kubernetes_resource data source
+	reattachInfo2, err := provider.ServeTest(ctx, hclog.Default(), t)
+	if err != nil {
+		t.Errorf("Failed to create additional provider instance: %q", err)
+	}
+	step2 := tfhelper.RequireNewWorkingDir(ctx, t)
+	step2.SetReattachInfo(ctx, reattachInfo2)
+	defer func() {
+		step2.Destroy(ctx)
+		step2.Close()
+		k8shelper.AssertNamespacedResourceDoesNotExist(t, "v1", "deployments", namespace, name2)
+	}()
+
+	tfconfig = loadTerraformConfig(t, "datasource-resource-status/step2.tf", tfvars)
+	step2.SetConfig(ctx, string(tfconfig))
+	step2.Init(ctx)
+	step2.Apply(ctx)
+
+	s2, err := step2.State(ctx)
+	if err != nil {
+		t.Fatalf("Failed to retrieve terraform state: %q", err)
+	}
+	tfstate := tfstatehelper.NewHelper(s2)
+
+	// check that the data source has the status field defined
+	tfstate.AssertAttributeNotEmpty(t, "data.kubernetes_resource.test_deploy.object.status")
+}

manifest/test/acceptance/testdata/datasource-resource-status/step1.tf

@@ -0,0 +1,34 @@
+resource "kubernetes_deployment" "test_deploy" {
+  api_version = "v1"
+
+  metadata = {
+    name = var.name
+    namespace = var.namespace
+  }
+
+  spec {
+    replicas = 1
+
+    selector {
+      match_labels = {
+        test = "test-status"
+      }
+    }
+
+    template {
+      metadata {
+        labels = {
+          test = "test-status"
+        }
+      }
+
+      spec {
+        container {
+          image = "nginx:1.21.6"
+          name  = "test"
+          }
+        }
+      }
+    }
+  }
+}

manifest/test/acceptance/testdata/datasource-resource-status/step2.tf

@@ -0,0 +1,8 @@
+data "kubernetes_resource" "test_deploy" {
+  api_version = "v1"
+  kind = "Deployment"
+  metadata {
+    name = var.name
+    namespace = var.namespace
+  }
+}

manifest/test/acceptance/testdata/datasource-resource-status/variables.tf

@@ -0,0 +1,16 @@
+# These variable declarations are only used for interactive testing.
+# The test code will template in different variable declarations with a default value when running the test.
+#
+# To set values for interactive runs, create a var-file and set values in it.
+# If the name of the var-file ends in '.auto.tfvars' (e.g. myvalues.auto.tfvars)
+# it will be automatically picked up and used by Terraform.
+#
+# DO NOT check in any files named *.auto.tfvars when making changes to tests.
+
+variable "name" {
+  type = string
+}
+
+variable "namespace" {
+  type = string
+}