Pull image if without when create service

Signed-off-by: skanehira <[email protected]>

Author: skanehira

compose-ref.go

@@ -201,6 +201,7 @@ func doUp(project string, config *compose.Config) error {
 		if err != nil {
 			return err
 		}
+
 		return createService(cli, project, prjDir, service, networks)
 	})
 
@@ -221,6 +222,11 @@ func doUp(project string, config *compose.Config) error {
 func createService(cli *client.Client, project string, prjDir string, s compose.ServiceConfig, networks map[string]string) error {
 	ctx := context.Background()
 
+	err := internal.PullImageIfWithout(cli, ctx, s.Name)
+	if err != nil {
+		return err
+	}
+
 	var shmSize int64
 	if s.ShmSize != "" {
 		v, err := units.RAMInBytes(s.ShmSize)

internal/image.go

@@ -0,0 +1,45 @@
+/*
+   Copyright 2020 The Compose Specification Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package internal
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/docker/docker/api/types"
+	"github.com/docker/docker/api/types/filters"
+	"github.com/docker/docker/client"
+)
+
+func PullImageIfWithout(cli *client.Client, ctx context.Context, name string) error {
+	args := filters.NewArgs(filters.Arg("reference", name))
+	images, err := cli.ImageList(ctx, types.ImageListOptions{All: true, Filters: args})
+	if err != nil {
+		return err
+	}
+	if len(images) == 0 {
+		fmt.Println("pulling image: " + name)
+		_, err := cli.ImagePull(ctx, name, types.ImagePullOptions{})
+		if err != nil {
+			return err
+		}
+
+		// TODO use github.com/docker/cli/cli/streams to dispaly stream message
+	}
+
+	return nil
+}