provider/archive: Converting to datasource. (#8492)

* Converting archive_file to datasource.

* Ratcheting back new dir perms.

* Ratcheting back new dir perms.

* goimports

* Adding output_base64sha256 attribute to archive_file.

Updating docs.

* Dropping CheckDestroy since this is a data source.

* Correcting data source attribute checks.

builtin/providers/archive/data_source_archive_file.go

@@ -2,6 +2,8 @@ package archive
 
 import (
 	"crypto/sha1"
+	"crypto/sha256"
+	"encoding/base64"
 	"encoding/hex"
 	"fmt"
 	"io/ioutil"
@@ -11,13 +13,9 @@ import (
 	"github.com/hashicorp/terraform/helper/schema"
 )
 
-func resourceArchiveFile() *schema.Resource {
+func dataSourceFile() *schema.Resource {
 	return &schema.Resource{
-		Create: resourceArchiveFileCreate,
-		Read:   resourceArchiveFileRead,
-		Update: resourceArchiveFileUpdate,
-		Delete: resourceArchiveFileDelete,
-		Exists: resourceArchiveFileExists,
+		Read: dataSourceFileRead,
 
 		Schema: map[string]*schema.Schema{
 			"type": &schema.Schema{
@@ -64,50 +62,56 @@ func resourceArchiveFile() *schema.Resource {
 				ForceNew:    true,
 				Description: "SHA1 checksum of output file",
 			},
+			"output_base64sha256": &schema.Schema{
+				Type:        schema.TypeString,
+				Computed:    true,
+				ForceNew:    true,
+				Description: "Base64 Encoded SHA256 checksum of output file",
+			},
 		},
 	}
 }
 
-func resourceArchiveFileCreate(d *schema.ResourceData, meta interface{}) error {
-	if err := resourceArchiveFileUpdate(d, meta); err != nil {
+func dataSourceFileRead(d *schema.ResourceData, meta interface{}) error {
+	outputPath := d.Get("output_path").(string)
+
+	outputDirectory := path.Dir(outputPath)
+	if outputDirectory != "" {
+		if _, err := os.Stat(outputDirectory); err != nil {
+			if err := os.MkdirAll(outputDirectory, 0755); err != nil {
 				return err
 			}
-	return resourceArchiveFileRead(d, meta)
+		}
 	}
 
-func resourceArchiveFileRead(d *schema.ResourceData, meta interface{}) error {
-	outputPath := d.Get("output_path").(string)
+	if err := archive(d); err != nil {
+		return err
+	}
+
+	// Generate archived file stats
 	fi, err := os.Stat(outputPath)
-	if os.IsNotExist(err) {
-		d.SetId("")
-		d.MarkNewResource()
-		return nil
+	if err != nil {
+		return err
 	}
 
-	sha, err := genFileSha1(outputPath)
+	sha1, base64sha256, err := genFileShas(outputPath)
 	if err != nil {
-		return fmt.Errorf("could not generate file checksum sha: %s", err)
+
+		return fmt.Errorf("could not generate file checksum sha256: %s", err)
 	}
-	d.Set("output_sha", sha)
+	d.Set("output_sha", sha1)
+	d.Set("output_base64sha256", base64sha256)
+
 	d.Set("output_size", fi.Size())
 	d.SetId(d.Get("output_sha").(string))
 
 	return nil
 }
 
-func resourceArchiveFileUpdate(d *schema.ResourceData, meta interface{}) error {
+func archive(d *schema.ResourceData) error {
 	archiveType := d.Get("type").(string)
 	outputPath := d.Get("output_path").(string)
 
-	outputDirectory := path.Dir(outputPath)
-	if outputDirectory != "" {
-		if _, err := os.Stat(outputDirectory); err != nil {
-			if err := os.MkdirAll(outputDirectory, 0777); err != nil {
-				return err
-			}
-		}
-	}
-
 	archiver := getArchiver(archiveType, outputPath)
 	if archiver == nil {
 		return fmt.Errorf("archive type not supported: %s", archiveType)
@@ -129,55 +133,22 @@ func resourceArchiveFileUpdate(d *schema.ResourceData, meta interface{}) error {
 	} else {
 		return fmt.Errorf("one of 'source_dir', 'source_file', 'source_content_filename' must be specified")
 	}
-
-	// Generate archived file stats
-	fi, err := os.Stat(outputPath)
-	if err != nil {
-		return err
-	}
-
-	sha, err := genFileSha1(outputPath)
-	if err != nil {
-		return fmt.Errorf("could not generate file checksum sha: %s", err)
-	}
-	d.Set("output_sha", sha)
-	d.Set("output_size", fi.Size())
-	d.SetId(d.Get("output_sha").(string))
-
 	return nil
 }
 
-func resourceArchiveFileDelete(d *schema.ResourceData, meta interface{}) error {
-	outputPath := d.Get("output_path").(string)
-	if _, err := os.Stat(outputPath); os.IsNotExist(err) {
-		return nil
-	}
-
-	if err := os.Remove(outputPath); err != nil {
-		return fmt.Errorf("could not delete zip file %q: %s", outputPath, err)
-	}
-
-	return nil
-}
-
-func resourceArchiveFileExists(d *schema.ResourceData, meta interface{}) (bool, error) {
-	outputPath := d.Get("output_path").(string)
-	_, err := os.Stat(outputPath)
-	if os.IsNotExist(err) {
-		return false, nil
-	}
-	if err != nil {
-		return false, err
-	}
-	return true, nil
-}
-
-func genFileSha1(filename string) (string, error) {
+func genFileShas(filename string) (string, string, error) {
 	data, err := ioutil.ReadFile(filename)
 	if err != nil {
-		return "", fmt.Errorf("could not compute file '%s' checksum: %s", filename, err)
+		return "", "", fmt.Errorf("could not compute file '%s' checksum: %s", filename, err)
 	}
 	h := sha1.New()
 	h.Write([]byte(data))
-	return hex.EncodeToString(h.Sum(nil)), nil
+	sha1 := hex.EncodeToString(h.Sum(nil))
+
+	h256 := sha256.New()
+	h256.Write([]byte(data))
+	shaSum := h256.Sum(nil)
+	sha256base64 := base64.StdEncoding.EncodeToString(shaSum[:])
+
+	return sha1, sha256base64, nil
 }

builtin/providers/archive/data_source_archive_file_test.go

@@ -13,29 +13,26 @@ func TestAccArchiveFile_Basic(t *testing.T) {
 	var fileSize string
 	r.Test(t, r.TestCase{
 		Providers: testProviders,
-		CheckDestroy: r.ComposeTestCheckFunc(
-			testAccArchiveFileMissing("zip_file_acc_test.zip"),
-		),
 		Steps: []r.TestStep{
 			r.TestStep{
 				Config: testAccArchiveFileContentConfig,
 				Check: r.ComposeTestCheckFunc(
 					testAccArchiveFileExists("zip_file_acc_test.zip", &fileSize),
-					r.TestCheckResourceAttrPtr("archive_file.foo", "output_size", &fileSize),
+					r.TestCheckResourceAttrPtr("data.archive_file.foo", "output_size", &fileSize),
 				),
 			},
 			r.TestStep{
 				Config: testAccArchiveFileFileConfig,
 				Check: r.ComposeTestCheckFunc(
 					testAccArchiveFileExists("zip_file_acc_test.zip", &fileSize),
-					r.TestCheckResourceAttrPtr("archive_file.foo", "output_size", &fileSize),
+					r.TestCheckResourceAttrPtr("data.archive_file.foo", "output_size", &fileSize),
 				),
 			},
 			r.TestStep{
 				Config: testAccArchiveFileDirConfig,
 				Check: r.ComposeTestCheckFunc(
 					testAccArchiveFileExists("zip_file_acc_test.zip", &fileSize),
-					r.TestCheckResourceAttrPtr("archive_file.foo", "output_size", &fileSize),
+					r.TestCheckResourceAttrPtr("data.archive_file.foo", "output_size", &fileSize),
 				),
 			},
 			r.TestStep{
@@ -60,21 +57,8 @@ func testAccArchiveFileExists(filename string, fileSize *string) r.TestCheckFunc
 	}
 }
 
-func testAccArchiveFileMissing(filename string) r.TestCheckFunc {
-	return func(s *terraform.State) error {
-		_, err := os.Stat(filename)
-		if err != nil {
-			if os.IsNotExist(err) {
-				return nil
-			}
-			return err
-		}
-		return fmt.Errorf("found file expected to be deleted: %s", filename)
-	}
-}
-
 var testAccArchiveFileContentConfig = `
-resource "archive_file" "foo" {
+data "archive_file" "foo" {
   type                    = "zip"
   source_content          = "This is some content"
   source_content_filename = "content.txt"
@@ -84,7 +68,7 @@ resource "archive_file" "foo" {
 
 var tmpDir = os.TempDir() + "/test"
 var testAccArchiveFileOutputPath = fmt.Sprintf(`
-resource "archive_file" "foo" {
+data "archive_file" "foo" {
   type                    = "zip"
   source_content          = "This is some content"
   source_content_filename = "content.txt"
@@ -93,7 +77,7 @@ resource "archive_file" "foo" {
 `, tmpDir)
 
 var testAccArchiveFileFileConfig = `
-resource "archive_file" "foo" {
+data "archive_file" "foo" {
   type        = "zip"
   source_file = "test-fixtures/test-file.txt"
   output_path = "zip_file_acc_test.zip"
@@ -101,7 +85,7 @@ resource "archive_file" "foo" {
 `
 
 var testAccArchiveFileDirConfig = `
-resource "archive_file" "foo" {
+data "archive_file" "foo" {
   type        = "zip"
   source_dir  = "test-fixtures/test-dir"
   output_path = "zip_file_acc_test.zip"

builtin/providers/archive/provider.go

@@ -7,10 +7,14 @@ import (
 
 func Provider() terraform.ResourceProvider {
 	return &schema.Provider{
-		Schema: map[string]*schema.Schema{},
-
+		DataSourcesMap: map[string]*schema.Resource{
+			"archive_file": dataSourceFile(),
+		},
 		ResourcesMap: map[string]*schema.Resource{
-			"archive_file": resourceArchiveFile(),
+			"archive_file": schema.DataSourceResourceShim(
+				"archive_file",
+				dataSourceFile(),
+			),
 		},
 	}
 }

website/source/docs/providers/archive/d/archive_file.md

@@ -1,7 +1,7 @@
 ---
 layout: "archive"
 page_title: "Archive: archive_file"
-sidebar_current: "docs-archive-resource-file"
+sidebar_current: "docs-archive-datasource-archive-file"
 description: |-
   Generates an archive from content, a file, or directory of files.
 ---
@@ -13,9 +13,9 @@ Generates an archive from content, a file, or directory of files.
 ## Example Usage
 
 ```
-resource "archive_file" "init" {
+data "archive_file" "init" {
     type        = "zip"
-    source_content_filename = "${path.module}/init.tpl"
+    source_file = "${path.module}/init.tpl"
     output_path = "${path.module}/files/init.zip"
 }
 ```
@@ -44,4 +44,7 @@ NOTE: One of `source_content_filename` (with `source_content`), `source_file`, o
 The following attributes are exported:
 
 * `output_size` - The size of the output archive file.
+
 * `output_sha` - The SHA1 checksum of output archive file.
+
+* `output_base64sha256` - The base64-encoded SHA256 checksum of output archive file.

website/source/layouts/archive.erb

@@ -10,11 +10,11 @@
 					<a href="/docs/providers/archive/index.html">Archive Provider</a>
 				</li>
 
-				<li<%= sidebar_current(/^docs-archive-resource/) %>>
-					<a href="#">Resources</a>
+				<li<%= sidebar_current(/^docs-archive-datasource/) %>>
+					<a href="#">Data Sources</a>
 					<ul class="nav nav-visible">
-						<li<%= sidebar_current("docs-archive-resource-file") %>>
-							<a href="/docs/providers/archive/r/file.html">archive_file</a>
+						<li<%= sidebar_current("docs-archive-datasource-archive-file") %>>
+							<a href="/docs/providers/archive/d/archive_file.html">archive_file</a>
 						</li>
 					</ul>
 				</li>