feat(opm): add unprivileged registry add

Add the ability to pull and unpack bundle images without using to an external tool or daemon.

Also, introduce a new set of bundle image oriented interfaces to decouple image interaction from shelling out to external tools.

Author: njhale

cmd/opm/registry/add.go

@@ -27,7 +27,7 @@ func newRegistryAddCmd() *cobra.Command {
 	rootCmd.Flags().StringP("database", "d", "bundles.db", "relative path to database file")
 	rootCmd.Flags().StringSliceP("bundle-images", "b", []string{}, "comma separated list of links to bundle image")
 	rootCmd.Flags().Bool("permissive", false, "allow registry load errors")
-	rootCmd.Flags().StringP("container-tool", "c", "podman", "tool to interact with container images (save, build, etc.). One of: [docker, podman]")
+	rootCmd.Flags().StringP("container-tool", "c", "podman", "tool to interact with container images (save, build, etc.). One of: [docker, podman, unprivileged]")
 
 	return rootCmd
 }
@@ -53,9 +53,9 @@ func addFunc(cmd *cobra.Command, args []string) error {
 	}
 
 	request := registry.AddToRegistryRequest{
-		Bundles: bundleImages,
+		Bundles:       bundleImages,
 		InputDatabase: fromFilename,
-		Permissive: permissive,
+		Permissive:    permissive,
 		ContainerTool: containerTool,
 	}
 

go.mod

@@ -4,8 +4,13 @@ go 1.13
 
 require (
 	github.com/antihax/optional v0.0.0-20180407024304-ca021399b1a6
+	github.com/containerd/containerd v1.3.2
+	github.com/containerd/continuity v0.0.0-20200228182428-0f16d7a0959c // indirect
+	github.com/deislabs/oras v0.8.1
 	github.com/docker/distribution v2.7.1+incompatible
+	github.com/docker/go-events v0.0.0-20190806004212-e31b211e4f1c // indirect
 	github.com/ghodss/yaml v1.0.0
+	github.com/gogo/googleapis v1.3.2 // indirect
 	github.com/golang-migrate/migrate/v4 v4.6.2
 	github.com/golang/mock v1.3.1
 	github.com/golang/protobuf v1.3.2
@@ -14,20 +19,23 @@ require (
 	github.com/maxbrunsfeld/counterfeiter/v6 v6.2.2
 	github.com/onsi/ginkgo v1.10.1
 	github.com/onsi/gomega v1.7.0
+	github.com/opencontainers/image-spec v1.0.1
 	github.com/operator-framework/api v0.1.1
 	github.com/otiai10/copy v1.0.2
-	github.com/pkg/errors v0.8.1
+	github.com/pkg/errors v0.9.1
 	github.com/sirupsen/logrus v1.4.2
 	github.com/spf13/cobra v0.0.5
 	github.com/stretchr/testify v1.4.0
+	go.etcd.io/bbolt v1.3.3
 	golang.org/x/net v0.0.0-20191028085509-fe3aa8a45271
 	golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45
-	google.golang.org/grpc v1.24.0
+	google.golang.org/grpc v1.27.0
 	gopkg.in/yaml.v2 v2.2.8
 	k8s.io/api v0.17.3
 	k8s.io/apiextensions-apiserver v0.17.3
 	k8s.io/apimachinery v0.17.3
 	k8s.io/client-go v0.17.3
 	k8s.io/klog v1.0.0
 	k8s.io/kubectl v0.17.3
+	rsc.io/letsencrypt v0.0.3 // indirect
 )