introduce config --built-images

It solves docker#8994

Signed-off-by: abdennour <mail@abdennoor.com>

cmd/compose/convert.go

@@ -50,7 +50,7 @@ type convertOptions struct {
 	profiles            bool
 	images              bool
 	hash                string
-	onlyBuilt           bool
+	builtImages         bool
 }
 
 func convertCommand(p *projectOptions, backend api.Service) *cobra.Command {
@@ -87,7 +87,7 @@ func convertCommand(p *projectOptions, backend api.Service) *cobra.Command {
 			if opts.profiles {
 				return runProfiles(opts, args)
 			}
-			if opts.images {
+			if opts.images || opts.builtImages {
 				return runConfigImages(opts, args)
 			}
 
@@ -106,7 +106,7 @@ func convertCommand(p *projectOptions, backend api.Service) *cobra.Command {
 	flags.BoolVar(&opts.volumes, "volumes", false, "Print the volume names, one per line.")
 	flags.BoolVar(&opts.profiles, "profiles", false, "Print the profile names, one per line.")
 	flags.BoolVar(&opts.images, "images", false, "Print the image names, one per line.")
-	flags.BoolVar(&opts.onlyBuilt, "only-built", false, "filter only services which uses built images")
+	flags.BoolVar(&opts.builtImages, "built-images", false, "Print only built image names, one per line")
 	flags.StringVar(&opts.hash, "hash", "", "Print the service config hash, one per line.")
 	flags.StringVarP(&opts.Output, "output", "o", "", "Save to file (default to stdout)")
 
@@ -229,7 +229,7 @@ func runConfigImages(opts convertOptions, services []string) error {
 		return err
 	}
 	for _, s := range project.Services {
-		if !opts.onlyBuilt || (opts.onlyBuilt && s.Build != nil) {
+		if !opts.builtImages || (opts.builtImages && s.Build != nil) {
 			fmt.Println(getImageName(s, *project))
 		}
 	}

cmd/compose/convert_test.go

@@ -0,0 +1,80 @@
+/*
+   Copyright 2020 Docker Compose CLI 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 compose
+
+import (
+	"testing"
+
+	"github.com/compose-spec/compose-go/types"
+)
+
+func Test_getImageName(t *testing.T) {
+	type args struct {
+		s types.ServiceConfig
+		p types.Project
+	}
+	tests := []struct {
+		name string
+		args args
+		want string
+	}{
+		{
+			name: "image not mentioned explicitly",
+			args: args{
+				s: types.ServiceConfig{
+					Name: "s1",
+				},
+				p: types.Project{
+					Name: "p1",
+				},
+			},
+			want: "p1_s1",
+		},
+		{
+			name: "another image not mentioned explicitly",
+			args: args{
+				s: types.ServiceConfig{
+					Name: "frontend",
+				},
+				p: types.Project{
+					Name: "devops",
+				},
+			},
+			want: "devops_frontend",
+		},
+		{
+			name: "image mentioned explicitly",
+			args: args{
+				s: types.ServiceConfig{
+					Name:  "s1",
+					Image: "myimage:mytag",
+				},
+				p: types.Project{
+					Name: "p1",
+				},
+			},
+			want: "myimage:mytag",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := getImageName(tt.args.s, tt.args.p); got != tt.want {
+				t.Errorf("getImageName() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}