Add SAML Group link resource

docs/resources/group_saml_link.md

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+---
+# generated by https://github.com/hashicorp/terraform-plugin-docs
+page_title: "gitlab_group_saml_link Resource - terraform-provider-gitlab"
+subcategory: ""
+description: |-
+  The gitlab_group_saml_link resource allows to manage the lifecycle of an SAML integration with a group.
+  Upstream API: GitLab REST API docs https://docs.gitlab.com/ee/api/groups.html#saml-group-links
+---
+
+# gitlab_group_saml_link (Resource)
+
+The `gitlab_group_saml_link` resource allows to manage the lifecycle of an SAML integration with a group.
+
+**Upstream API**: [GitLab REST API docs](https://docs.gitlab.com/ee/api/groups.html#saml-group-links)
+
+## Example Usage
+
+```terraform
+resource "gitlab_group_saml_link" "test" {
+  group_id        = "12345"
+  access_level    = "Developer"
+  saml_group_name = "samlgroupname1"
+}
+```
+
+<!-- schema generated by tfplugindocs -->
+## Schema
+
+### Required
+
+- `access_level` (String) Access level for members of the SAML group. Valid values are: `guest`, `reporter`, `developer`, `maintainer`, `owner`.
+- `group` (String) The ID or path of the group to add the SAML Group Link to.
+- `saml_group_name` (String) The name of the SAML group.
+
+### Read-Only
+
+- `id` (String) The ID of this resource.
+
+## Import
+
+Import is supported using the following syntax:
+
+```shell
+# GitLab group saml links can be imported using an id made up of `group_id:saml_group_name`, e.g.
+terraform import gitlab_group_saml_link.test "12345:samlgroupname1"
+```

examples/resources/gitlab_group_saml_link/import.sh

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+# GitLab group saml links can be imported using an id made up of `group_id:saml_group_name`, e.g.
+terraform import gitlab_group_saml_link.test "12345:samlgroupname1"

examples/resources/gitlab_group_saml_link/resource.tf

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+resource "gitlab_group_saml_link" "test" {
+  group_id        = "12345"
+  access_level    = "Developer"
+  saml_group_name = "samlgroupname1"
+}

internal/provider/resource_gitlab_group_saml_link.go

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+package provider
+
+import (
+	"context"
+	"fmt"
+	"log"
+
+	"github.com/hashicorp/terraform-plugin-sdk/v2/diag"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/validation"
+	gitlab "github.com/xanzy/go-gitlab"
+)
+
+var _ = registerResource("gitlab_group_saml_link", func() *schema.Resource {
+	validGroupSamlLinkAccessLevelNames := []string{
+		"guest",
+		"reporter",
+		"developer",
+		"maintainer",
+		"owner",
+	}
+
+	return &schema.Resource{
+		Description: `The ` + "`gitlab_group_saml_link`" + ` resource allows to manage the lifecycle of an SAML integration with a group.
+
+**Upstream API**: [GitLab REST API docs](https://docs.gitlab.com/ee/api/groups.html#saml-group-links)`,
+
+		CreateContext: resourceGitlabGroupSamlLinkCreate,
+		ReadContext:   resourceGitlabGroupSamlLinkRead,
+		DeleteContext: resourceGitlabGroupSamlLinkDelete,
+		Importer: &schema.ResourceImporter{
+			StateContext: schema.ImportStatePassthroughContext,
+		},
+
+		Schema: map[string]*schema.Schema{
+			"group": {
+				Description: "The ID or path of the group to add the SAML Group Link to.",
+				Type:        schema.TypeString,
+				Required:    true,
+				ForceNew:    true,
+			},
+			"saml_group_name": {
+				Description: "The name of the SAML group.",
+				Type:        schema.TypeString,
+				Required:    true,
+				ForceNew:    true,
+			},
+			"access_level": {
+				Description:      fmt.Sprintf("Access level for members of the SAML group. Valid values are: %s.", renderValueListForDocs(validGroupSamlLinkAccessLevelNames)),
+				Type:             schema.TypeString,
+				ValidateDiagFunc: validation.ToDiagFunc(validation.StringInSlice(validGroupSamlLinkAccessLevelNames, false)),
+				Required:         true,
+				ForceNew:         true,
+			},
+		},
+	}
+})
+
+func resourceGitlabGroupSamlLinkCreate(ctx context.Context, d *schema.ResourceData, meta interface{}) diag.Diagnostics {
+	client := meta.(*gitlab.Client)
+
+	group := d.Get("group").(string)
+	samlGroupName := d.Get("saml_group_name").(string)
+	accessLevel := accessLevelNameToValue[d.Get("access_level").(string)]
+
+	options := &gitlab.AddGroupSAMLLinkOptions{
+		SAMLGroupName: gitlab.String(samlGroupName),
+		AccessLevel:   gitlab.AccessLevel(accessLevel),
+	}
+
+	log.Printf("[DEBUG] Create GitLab Group SAML Link for group %q with name %q", group, samlGroupName)
+	SamlLink, _, err := client.Groups.AddGroupSAMLLink(group, options, gitlab.WithContext(ctx))
+	if err != nil {
+		return diag.FromErr(err)
+	}
+
+	d.SetId(buildTwoPartID(&group, &SamlLink.Name))
+	return resourceGitlabGroupSamlLinkRead(ctx, d, meta)
+}
+
+func resourceGitlabGroupSamlLinkRead(ctx context.Context, d *schema.ResourceData, meta interface{}) diag.Diagnostics {
+	client := meta.(*gitlab.Client)
+	group, samlGroupName, parse_err := parseTwoPartID(d.Id())
+	if parse_err != nil {
+		return diag.FromErr(parse_err)
+	}
+
+	// Try to fetch all group links from GitLab
+	log.Printf("[DEBUG] Read GitLab Group SAML Link for group %q", group)
+	samlLink, _, err := client.Groups.GetGroupSAMLLink(group, samlGroupName, nil, gitlab.WithContext(ctx))
+	if err != nil {
+		if is404(err) {
+			log.Printf("[DEBUG] GitLab SAML Group Link %s for group ID %s not found, removing from state", samlGroupName, group)
+			d.SetId("")
+			return nil
+		}
+		return diag.FromErr(err)
+	}
+
+	d.Set("group", group)
+	d.Set("access_level", accessLevelValueToName[samlLink.AccessLevel])
+	d.Set("saml_group_name", samlLink.Name)
+
+	return nil
+}
+
+func resourceGitlabGroupSamlLinkDelete(ctx context.Context, d *schema.ResourceData, meta interface{}) diag.Diagnostics {
+	client := meta.(*gitlab.Client)
+	group, samlGroupName, parse_err := parseTwoPartID(d.Id())
+	if parse_err != nil {
+		return diag.FromErr(parse_err)
+	}
+
+	log.Printf("[DEBUG] Delete GitLab Group SAML Link for group %q with name %q", group, samlGroupName)
+	_, err := client.Groups.DeleteGroupSAMLLink(group, samlGroupName, gitlab.WithContext(ctx))
+	if err != nil {
+		if is404(err) {
+			log.Printf("[WARNING] %s", err)
+		} else {
+			return diag.FromErr(err)
+		}
+	}
+
+	return nil
+}

internal/provider/resource_gitlab_group_saml_link_test.go

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+//go:build acceptance
+// +build acceptance
+
+package provider
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/terraform"
+)
+
+func TestAccGitlabGroupSamlLink_basic(t *testing.T) {
+	testAccCheckEE(t)
+	testAccRequiresAtLeast(t, "15.3")
+
+	testGroup := testAccCreateGroups(t, 1)[0]
+
+	resource.ParallelTest(t, resource.TestCase{
+		ProviderFactories: providerFactories,
+		CheckDestroy:      testAccCheckGitlabGroupSamlLinkDestroy,
+		Steps: []resource.TestStep{
+
+			// Create a group SAML link as a developer
+			{
+				Config: fmt.Sprintf(`
+					resource "gitlab_group_saml_link" "this" {
+						group   		= "%d"
+						access_level 	= "developer"
+						saml_group_name = "test_saml_group"
+
+					}
+				`, testGroup.ID),
+			},
+			// Verify Import
+			{
+				ResourceName:      "gitlab_group_saml_link.this",
+				ImportState:       true,
+				ImportStateVerify: true,
+			},
+			// Update the group SAML link to change the access level
+			{
+				Config: fmt.Sprintf(`
+					resource "gitlab_group_saml_link" "this" {
+						group   		= "%d"
+						access_level 	= "maintainer"
+						saml_group_name = "test_saml_group"
+
+					}
+				`, testGroup.ID),
+			},
+		},
+	})
+}
+
+func testAccCheckGitlabGroupSamlLinkDestroy(s *terraform.State) error {
+	for _, resourceState := range s.RootModule().Resources {
+		if resourceState.Type != "gitlab_group_saml_link" {
+			continue
+		}
+
+		group, samlGroupName, err := parseTwoPartID(resourceState.Primary.ID)
+		if err != nil {
+			return err
+		}
+
+		samlGroupLink, _, err := testGitlabClient.Groups.GetGroupSAMLLink(group, samlGroupName)
+		if err == nil {
+			if samlGroupLink != nil {
+				return fmt.Errorf("SAML Group Link still exists")
+			}
+		}
+		if !is404(err) {
+			return err
+		}
+		return nil
+	}
+	return nil
+}