add digests flag and detailed arch (#21)

* add digests flag
* add variants and features to  arch

cmd/dockertags/main.go

@@ -35,7 +35,6 @@ OPTIONS:
 	app.Name = "dockertags"
 	app.Version = version
 	app.ArgsUsage = "image_name"
-
 	app.Usage = "fetch docker image tags"
 
 	app.Flags = []cli.Flag{
@@ -74,6 +73,10 @@ OPTIONS:
 			Name:  "password, p",
 			Usage: "Using -password via CLI is insecure. Be careful.",
 		},
+		cli.BoolFlag{
+			Name:  "digests",
+			Usage: "Show long digests",
+		},
 		cli.BoolFlag{
 			Name:  "debug, d",
 			Usage: "Show debug logs",

internal/report/table.go

@@ -16,7 +16,8 @@ import (
 
 // TableWriter output table format
 type TableWriter struct {
-	Output io.Writer
+	Output      io.Writer
+	LongDigests bool
 }
 
 // Write is
@@ -31,7 +32,11 @@ func (w TableWriter) Write(tags types.ImageTags) (err error) {
 		var sizes, digests, osArchs []string
 		for _, datum := range tag.Data {
 			sizes = append(sizes, getBytesize(datum.Byte))
-			digests = append(digests, trimHash(datum.Digest))
+			digest := datum.Digest
+			if !w.LongDigests {
+				digest = trimHash(datum.Digest)
+			}
+			digests = append(digests, digest)
 			if datum.Os != "" {
 				osArchs = append(osArchs, fmt.Sprintf("%s/%s", datum.Os, datum.Arch))
 			}

pkg/provider/dockerhub/dockerhub.go

@@ -158,18 +158,27 @@ func (p *DockerHub) summarizeByTagNames(keyDigestMap map[string]types.ImageTag)
 func convertUploadImageTag(is tagSummary, img image) types.ImageTag {
 	uploadedAt, _ := time.Parse(time.RFC3339Nano, is.LastUpdated)
 	tagNames := []string{is.Name}
+	archName := concatWithSlash(img.Architecture, img.Features)
+	archName = concatWithSlash(archName, img.Variant)
 	return types.ImageTag{
 		Tags: tagNames,
 		Data: []types.TagAttr{{
 			Os:     img.Os,
-			Arch:   img.Architecture,
+			Arch:   archName,
 			Digest: img.Digest,
 			Byte:   img.Size,
 		}},
 		UploadedAt: uploadedAt,
 	}
 }
 
+func concatWithSlash(original, adding string) string {
+	if adding == "" {
+		return original
+	}
+	return original + "/" + adding
+}
+
 // getTagResponse returns the tags for a specific repository.
 // curl 'https://registry.hub.docker.com/v2/repositories/library/debian/tags/'
 func getTagResponse(ctx context.Context, auth dockertypes.AuthConfig, timeout time.Duration, repository string, page int) (tagsResponse, error) {