*: use opencontainers/go-digest package

The `digest` data type, used throughout docker for image verification
and identity, has been broken out into `opencontainers/go-digest`. This
PR updates the dependencies and moves uses over to the new type.

Signed-off-by: Stephen J Day <stephen.day@docker.com>
Upstream-commit: 7a855799175b6b984886ef1cfa337d6df1d4c668
Component: engine

components/engine/integration-cli/docker_cli_by_digest_test.go

@@ -8,13 +8,13 @@ import (
 	"regexp"
 	"strings"
 
-	"github.com/docker/distribution/digest"
 	"github.com/docker/distribution/manifest/schema1"
 	"github.com/docker/distribution/manifest/schema2"
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/integration-cli/checker"
 	"github.com/docker/docker/pkg/stringutils"
 	"github.com/go-check/check"
+	"github.com/opencontainers/go-digest"
 )
 
 var (

components/engine/integration-cli/docker_cli_pull_local_test.go

@@ -11,12 +11,12 @@ import (
 	"strings"
 
 	"github.com/docker/distribution"
-	"github.com/docker/distribution/digest"
 	"github.com/docker/distribution/manifest"
 	"github.com/docker/distribution/manifest/manifestlist"
 	"github.com/docker/distribution/manifest/schema2"
 	"github.com/docker/docker/integration-cli/checker"
 	"github.com/go-check/check"
+	"github.com/opencontainers/go-digest"
 )
 
 // testPullImageWithAliases pulls a specific image tag and verifies that any aliases (i.e., other

components/engine/integration-cli/docker_cli_pull_test.go

@@ -7,9 +7,9 @@ import (
 	"sync"
 	"time"
 
-	"github.com/docker/distribution/digest"
 	"github.com/docker/docker/integration-cli/checker"
 	"github.com/go-check/check"
+	"github.com/opencontainers/go-digest"
 )
 
 // TestPullFromCentralRegistry pulls an image from the central registry and verifies that the client
@@ -26,7 +26,7 @@ func (s *DockerHubPullSuite) TestPullFromCentralRegistry(c *check.C) {
 	matches := regexp.MustCompile(`Digest: (.+)\n`).FindAllStringSubmatch(out, -1)
 	c.Assert(len(matches), checker.Equals, 1, check.Commentf("expected exactly one image digest in the output"))
 	c.Assert(len(matches[0]), checker.Equals, 2, check.Commentf("unexpected number of submatches for the digest"))
-	_, err := digest.ParseDigest(matches[0][1])
+	_, err := digest.Parse(matches[0][1])
 	c.Check(err, checker.IsNil, check.Commentf("invalid digest %q in output", matches[0][1]))
 
 	// We should have a single entry in images.

components/engine/integration-cli/docker_cli_save_load_test.go

@@ -13,10 +13,10 @@ import (
 	"strings"
 	"time"
 
-	"github.com/docker/distribution/digest"
 	"github.com/docker/docker/integration-cli/checker"
 	"github.com/docker/docker/pkg/testutil"
 	"github.com/go-check/check"
+	"github.com/opencontainers/go-digest"
 )
 
 // save a repo using gz compression and try to load it using stdout

components/engine/integration-cli/registry/registry.go

@@ -8,7 +8,7 @@ import (
 	"os/exec"
 	"path/filepath"
 
-	"github.com/docker/distribution/digest"
+	"github.com/opencontainers/go-digest"
 )
 
 const (