Fix unknown project name validation

Author: AdamCoulterOz

internal/services/git_integration/resource_environment_git_integration.go

@@ -17,6 +17,7 @@ import (
 	"github.com/hashicorp/terraform-plugin-framework/resource/schema/planmodifier"
 	"github.com/hashicorp/terraform-plugin-framework/resource/schema/stringplanmodifier"
 	"github.com/hashicorp/terraform-plugin-framework/schema/validator"
+	"github.com/hashicorp/terraform-plugin-framework/types"
 	"github.com/hashicorp/terraform-plugin-log/tflog"
 	"github.com/microsoft/terraform-provider-power-platform/internal/api"
 	"github.com/microsoft/terraform-provider-power-platform/internal/customerrors"
@@ -126,13 +127,17 @@ func (r *EnvironmentGitIntegrationResource) ValidateConfig(ctx context.Context,
 	ctx, exitContext := helpers.EnterRequestContext(ctx, r.TypeInfo, req)
 	defer exitContext()
 
-	var data EnvironmentGitIntegrationResourceModel
-	resp.Diagnostics.Append(req.Config.Get(ctx, &data)...)
+	var projectName types.String
+	resp.Diagnostics.Append(req.Config.GetAttribute(ctx, path.Root("project_name"), &projectName)...)
 	if resp.Diagnostics.HasError() {
 		return
 	}
 
-	if data.ProjectName.IsNull() || data.ProjectName.ValueString() == "" {
+	if projectName.IsUnknown() {
+		return
+	}
+
+	if projectName.IsNull() || projectName.ValueString() == "" {
 		resp.Diagnostics.AddAttributeError(
 			path.Root("project_name"),
 			"Missing project_name for AzureDevOps",

internal/services/git_integration/resource_environment_git_integration_validateconfig_test.go

@@ -0,0 +1,45 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT license.
+
+package git_integration_test
+
+import (
+	"testing"
+
+	"github.com/hashicorp/terraform-plugin-testing/helper/resource"
+	"github.com/microsoft/terraform-provider-power-platform/internal/mocks"
+)
+
+func TestUnitEnvironmentGitIntegrationResource_ValidateConfig_AllowsUnknownProjectName(t *testing.T) {
+	t.Parallel()
+
+	resource.Test(t, resource.TestCase{
+		IsUnitTest:               true,
+		ProtoV6ProviderFactories: mocks.TestUnitTestProtoV6ProviderFactories,
+		Steps: []resource.TestStep{
+			{
+				PlanOnly:           true,
+				ExpectNonEmptyPlan: true,
+				Config: `
+resource "powerplatform_environment_git_integration" "seed" {
+  environment_id    = "00000000-0000-0000-0000-000000000001"
+  git_provider      = "AzureDevOps"
+  scope             = "Solution"
+  organization_name = "example-org"
+  project_name      = "example-project"
+  repository_name   = "example-repo"
+}
+
+resource "powerplatform_environment_git_integration" "test" {
+  environment_id    = "00000000-0000-0000-0000-000000000001"
+  git_provider      = "AzureDevOps"
+  scope             = "Solution"
+  organization_name = "example-org"
+  project_name      = powerplatform_environment_git_integration.seed.id
+  repository_name   = "example-repo"
+}
+`,
+			},
+		},
+	})
+}