Implement the history API

dockerclient.go

@@ -738,3 +738,18 @@ func (client *DockerClient) BuildImage(image *BuildImage) (io.ReadCloser, error)
 	uri := fmt.Sprintf("/%s/build?%s", APIVersion, v.Encode())
 	return client.doStreamRequest("POST", uri, image.Context, headers)
 }
+
+func (client *DockerClient) History(id string) ([]ImageLayer, error) {
+	uri := fmt.Sprintf("/%s/images/%s/history", APIVersion, id)
+	data, err := client.doRequest("GET", uri, nil, nil)
+	if err != nil {
+		return []ImageLayer{}, err
+	}
+
+	layers := []ImageLayer{}
+	err = json.Unmarshal(data, &layers)
+	if err != nil {
+		return []ImageLayer{}, err
+	}
+	return layers, nil
+}

mockclient/mock.go

@@ -170,3 +170,8 @@ func (client *MockClient) BuildImage(image *dockerclient.BuildImage) (io.ReadClo
 	args := client.Mock.Called(image)
 	return args.Get(0).(io.ReadCloser), args.Error(1)
 }
+
+func (client *MockClient) History(id string) ([]dockerclient.ImageLayer, error) {
+	args := client.Mock.Called(id)
+	return args.Get(0).([]dockerclient.ImageLayer), args.Error(1)
+}

types.go

@@ -442,3 +442,12 @@ type BuildImage struct {
 	CpuSetMems     string
 	CgroupParent   string
 }
+
+type ImageLayer struct {
+	Id        string
+	Created   int64
+	CreatedBy string
+	Comment   string
+	Size      int64
+	Tags      []string
+}