feat: registry api

Author: d1nfinite

go.mod

@@ -5,6 +5,7 @@ go 1.16
 require (
 	github.com/chaitin/libveinmind v1.1.1
 	github.com/containerd/containerd v1.6.6
+	github.com/distribution/distribution v2.8.1+incompatible // indirect
 	github.com/docker/cli v20.10.17+incompatible
 	github.com/docker/distribution v2.8.1+incompatible
 	github.com/docker/docker v20.10.17+incompatible

go.sum

@@ -397,6 +397,8 @@ github.com/dgrijalva/jwt-go v0.0.0-20170104182250-a601269ab70c/go.mod h1:E3ru+11
 github.com/dgrijalva/jwt-go v3.2.0+incompatible h1:7qlOGliEKZXTDg6OTjfoBKDXWrumCAMpl/TFQ4/5kLM=
 github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
 github.com/dgryski/go-sip13 v0.0.0-20181026042036-e10d5fee7954/go.mod h1:vAd38F8PWV+bWy6jNmig1y/TA+kYO4g3RSRF0IAv0no=
+github.com/distribution/distribution v2.8.1+incompatible h1:8iXUoOqRPx30bhzIEPUmNIqlmBlWdrieW1bqr6LrX30=
+github.com/distribution/distribution v2.8.1+incompatible/go.mod h1:EgLm2NgWtdKgzF9NpMzUKgzmR7AMmb0VQi2B+ZzDRjc=
 github.com/dnaeon/go-vcr v1.0.1/go.mod h1:aBB1+wY4s93YsC3HHjMBMrwTj2R9FHDzUr9KyGc8n1E=
 github.com/docker/cli v0.0.0-20191017083524-a8ff7f821017/go.mod h1:JLrzqnKDaYBop7H2jaqPtU4hHvMKP+vjCwu2uszcLI8=
 github.com/docker/cli v20.10.16+incompatible/go.mod h1:JLrzqnKDaYBop7H2jaqPtU4hHvMKP+vjCwu2uszcLI8=

registry/registry.go

@@ -0,0 +1,44 @@
+package registry
+
+import (
+	"encoding/json"
+	"github.com/distribution/distribution/manifest/schema2"
+	"github.com/google/go-containerregistry/pkg/name"
+	"github.com/google/go-containerregistry/pkg/v1/remote"
+)
+
+type Client struct {
+}
+
+func NewClient() (*Client, error) {
+	c := new(Client)
+	return c, nil
+}
+
+func (client *Client) GetRepoTags(repo string, options ...remote.Option) ([]string, error) {
+	repoR, err := name.NewRepository(repo)
+	if err != nil {
+		return nil, err
+	}
+	return remote.List(repoR, options...)
+}
+
+func (client *Client) GetRepoManifest(repo string, options ...remote.Option) (*schema2.Manifest, error) {
+	ref, err := name.ParseReference(repo)
+	if err != nil {
+		return nil, err
+	}
+
+	desc, err := remote.Get(ref, options...)
+	if err != nil {
+		return nil, err
+	}
+
+	manifest := &schema2.Manifest{}
+	err = json.Unmarshal(desc.Manifest, manifest)
+	if err != nil {
+		return nil, err
+	}
+
+	return manifest, nil
+}