feat: supports Docker plugin (#35)

Closes #24

docker/data_source_docker_plugin.go

@@ -0,0 +1,80 @@
+package docker
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
+)
+
+func dataSourceDockerPlugin() *schema.Resource {
+	return &schema.Resource{
+		Read: dataSourceDockerPluginRead,
+
+		Schema: map[string]*schema.Schema{
+			"id": {
+				Type:     schema.TypeString,
+				Optional: true,
+			},
+			"alias": {
+				Type:        schema.TypeString,
+				Optional:    true,
+				Description: "Docker Plugin alias",
+			},
+
+			"plugin_reference": {
+				Type:        schema.TypeString,
+				Description: "Docker Plugin Reference",
+				Computed:    true,
+			},
+			"enabled": {
+				Type:     schema.TypeBool,
+				Computed: true,
+			},
+			"grant_all_permissions": {
+				Type:        schema.TypeBool,
+				Computed:    true,
+				Description: "If true, grant all permissions necessary to run the plugin",
+			},
+			"env": {
+				Type:     schema.TypeSet,
+				Computed: true,
+				Elem:     &schema.Schema{Type: schema.TypeString},
+			},
+		},
+	}
+}
+
+var errDataSourceKeyIsMissing = errors.New("One of id or alias must be assigned")
+
+func getDataSourcePluginKey(d *schema.ResourceData) (string, error) {
+	id, idOK := d.GetOk("id")
+	alias, aliasOK := d.GetOk("alias")
+	if idOK {
+		if aliasOK {
+			return "", errDataSourceKeyIsMissing
+		}
+		return id.(string), nil
+	}
+	if aliasOK {
+		return alias.(string), nil
+	}
+	return "", errDataSourceKeyIsMissing
+}
+
+func dataSourceDockerPluginRead(d *schema.ResourceData, meta interface{}) error {
+	key, err := getDataSourcePluginKey(d)
+	if err != nil {
+		return err
+	}
+	client := meta.(*ProviderConfig).DockerClient
+	ctx := context.Background()
+	plugin, _, err := client.PluginInspectWithRaw(ctx, key)
+	if err != nil {
+		return fmt.Errorf("inspect a Docker plugin "+key+": %w", err)
+	}
+
+	setDockerPlugin(d, plugin)
+	return nil
+}

docker/data_source_docker_plugin_test.go

@@ -0,0 +1,39 @@
+package docker
+
+import (
+	"os/exec"
+	"testing"
+
+	"github.com/hashicorp/terraform-plugin-sdk/helper/resource"
+)
+
+func TestAccDockerPluginDataSource_basic(t *testing.T) {
+	pluginName := "tiborvass/sample-volume-plugin"
+	// This fails if the plugin is already installed.
+	if err := exec.Command("docker", "plugin", "install", pluginName).Run(); err != nil {
+		t.Fatal(err)
+	}
+	defer func() {
+		if err := exec.Command("docker", "plugin", "rm", "-f", pluginName).Run(); err != nil {
+			t.Logf("failed to remove the Docker plugin %s: %v", pluginName, err)
+		}
+	}()
+	resource.Test(t, resource.TestCase{
+		PreCheck:  func() { testAccPreCheck(t) },
+		Providers: testAccProviders,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccDockerPluginDataSourceTest,
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestCheckResourceAttr("data.docker_plugin.test", "plugin_reference", "docker.io/tiborvass/sample-volume-plugin:latest"),
+				),
+			},
+		},
+	})
+}
+
+const testAccDockerPluginDataSourceTest = `
+data "docker_plugin" "test" {
+  alias = "tiborvass/sample-volume-plugin:latest"
+}
+`

docker/provider.go

@@ -109,11 +109,13 @@ func Provider() terraform.ResourceProvider {
 			"docker_config":         resourceDockerConfig(),
 			"docker_secret":         resourceDockerSecret(),
 			"docker_service":        resourceDockerService(),
+			"docker_plugin":         resourceDockerPlugin(),
 		},
 
 		DataSourcesMap: map[string]*schema.Resource{
 			"docker_registry_image": dataSourceDockerRegistryImage(),
 			"docker_network":        dataSourceDockerNetwork(),
+			"docker_plugin":         dataSourceDockerPlugin(),
 		},
 
 		ConfigureFunc: providerConfigure,

docker/resource_docker_container.go

@@ -310,7 +310,7 @@ func resourceDockerContainer() *schema.Resource {
 									},
 									"driver_name": {
 										Type:        schema.TypeString,
-										Description: "Name of the driver to use to create the volume.",
+										Description: "Name of the driver to use to create the volume",
 										Optional:    true,
 									},
 									"driver_options": {

docker/resource_docker_container_v1.go

@@ -275,7 +275,7 @@ func resourceDockerContainerV1() *schema.Resource {
 									},
 									"driver_name": {
 										Type:        schema.TypeString,
-										Description: "Name of the driver to use to create the volume.",
+										Description: "Name of the driver to use to create the volume",
 										Optional:    true,
 									},
 									"driver_options": {

docker/resource_docker_plugin.go

@@ -0,0 +1,95 @@
+package docker
+
+import (
+	"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
+)
+
+func resourceDockerPlugin() *schema.Resource {
+	return &schema.Resource{
+		Create: resourceDockerPluginCreate,
+		Read:   resourceDockerPluginRead,
+		Update: resourceDockerPluginUpdate,
+		Delete: resourceDockerPluginDelete,
+		Importer: &schema.ResourceImporter{
+			State: schema.ImportStatePassthrough,
+		},
+		Schema: map[string]*schema.Schema{
+			"name": {
+				Type:             schema.TypeString,
+				Required:         true,
+				ForceNew:         true,
+				Description:      "Docker Plugin name",
+				DiffSuppressFunc: diffSuppressFuncPluginName,
+				ValidateFunc:     validateFuncPluginName,
+			},
+			"alias": {
+				Type:        schema.TypeString,
+				Computed:    true,
+				Optional:    true,
+				ForceNew:    true,
+				Description: "Docker Plugin alias",
+				DiffSuppressFunc: func(k, oldV, newV string, d *schema.ResourceData) bool {
+					return complementTag(oldV) == complementTag(newV)
+				},
+			},
+			"enabled": {
+				Type:     schema.TypeBool,
+				Optional: true,
+				Default:  true,
+			},
+			"grant_all_permissions": {
+				Type:          schema.TypeBool,
+				Optional:      true,
+				Description:   "If true, grant all permissions necessary to run the plugin",
+				ConflictsWith: []string{"grant_permissions"},
+			},
+			"grant_permissions": {
+				Type:          schema.TypeSet,
+				Optional:      true,
+				ConflictsWith: []string{"grant_all_permissions"},
+				Set:           dockerPluginGrantPermissionsSetFunc,
+				Elem: &schema.Resource{
+					Schema: map[string]*schema.Schema{
+						"name": {
+							Type:     schema.TypeString,
+							Required: true,
+						},
+						"value": {
+							Type:     schema.TypeSet,
+							Required: true,
+							Elem: &schema.Schema{
+								Type: schema.TypeString,
+							},
+						},
+					},
+				},
+			},
+			"env": {
+				Type:     schema.TypeSet,
+				Optional: true,
+				Computed: true,
+				Elem:     &schema.Schema{Type: schema.TypeString},
+			},
+			"plugin_reference": {
+				Type:        schema.TypeString,
+				Description: "Docker Plugin Reference",
+				Computed:    true,
+			},
+
+			"force_destroy": {
+				Type:     schema.TypeBool,
+				Optional: true,
+			},
+			"enable_timeout": {
+				Type:        schema.TypeInt,
+				Optional:    true,
+				Description: "HTTP client timeout to enable the plugin",
+			},
+			"force_disable": {
+				Type:        schema.TypeBool,
+				Optional:    true,
+				Description: "If true, then the plugin is disabled forcibly when the plugin is disabled",
+			},
+		},
+	}
+}