introduce --no-resolve-image

Aligned with docker service create --no-resolve-image
Prevent image freeze during the build
Usefull for offline builds, as well as for our e2e tests :P

Signed-off-by: Nicolas De Loof <nicolas.deloof@gmail.com>

Author: ndeloof

e2e/commands_test.go

@@ -165,7 +165,7 @@ func TestInspectApp(t *testing.T) {
 		})
 
 		contextPath := filepath.Join("testdata", "simple")
-		cmd.Command = dockerCli.Command("app", "build", "--tag", "simple-app:1.0.0", contextPath)
+		cmd.Command = dockerCli.Command("app", "build", "--tag", "simple-app:1.0.0", "--no-resolve-image", contextPath)
 		cmd.Dir = ""
 		icmd.RunCmd(cmd).Assert(t, icmd.Success)
 

e2e/testdata/expected-json-render.golden

@@ -17,7 +17,7 @@
         "resources": {},
         "placement": {}
       },
-      "image": "python:3.6@sha256:52f872eae9755743c9494e0e3cf02a47d34b42032cab1e5ab777b30c3665d5f1",
+      "image": "python:3.6",
       "networks": {
         "back": null,
         "front": {
@@ -35,7 +35,7 @@
         "resources": {},
         "placement": {}
       },
-      "image": "postgres:9.3@sha256:3cd40afb5803762170a1149ade6962fe24d405b3ccf2fe499ff1428635520a17",
+      "image": "postgres:9.3",
       "networks": {
         "back": null
       }
@@ -47,7 +47,7 @@
         "resources": {},
         "placement": {}
       },
-      "image": "nginx:latest@sha256:922c815aa4df050d4df476e92daed4231f466acc8ee90e0e774951b0fd7195a4",
+      "image": "nginx:latest",
       "networks": {
         "front": null
       },

e2e/testdata/expected-yaml-render.golden

@@ -1,19 +1,19 @@
 version: "3.6"
 services:
   api:
-    image: python:3.6@sha256:52f872eae9755743c9494e0e3cf02a47d34b42032cab1e5ab777b30c3665d5f1
+    image: python:3.6
     networks:
       back: null
       front:
         aliases:
         - api.example.com
         - example.com
   db:
-    image: postgres:9.3@sha256:3cd40afb5803762170a1149ade6962fe24d405b3ccf2fe499ff1428635520a17
+    image: postgres:9.3
     networks:
       back: null
   web:
-    image: nginx:latest@sha256:922c815aa4df050d4df476e92daed4231f466acc8ee90e0e774951b0fd7195a4
+    image: nginx:latest
     networks:
       front: null
     ports:

internal/commands/build/build.go

@@ -4,21 +4,16 @@ import (
 	"bytes"
 	"context"
 	"encoding/json"
-	"errors"
 	"fmt"
 	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strconv"
 	"strings"
 
-	errors2 "github.com/pkg/errors"
-
-	"github.com/docker/app/internal"
-	"github.com/docker/cnab-to-oci/remotes"
-
 	"github.com/deislabs/cnab-go/bundle"
 	cnab "github.com/deislabs/cnab-go/driver"
+	"github.com/docker/app/internal"
 	"github.com/docker/app/internal/packager"
 	"github.com/docker/app/types"
 	"github.com/docker/buildx/build"
@@ -27,24 +22,27 @@ import (
 	"github.com/docker/buildx/util/progress"
 	"github.com/docker/cli/cli"
 	"github.com/docker/cli/cli/command"
+	"github.com/docker/cnab-to-oci/remotes"
 	"github.com/docker/distribution/reference"
 	"github.com/moby/buildkit/client"
 	"github.com/moby/buildkit/session"
 	"github.com/moby/buildkit/session/auth/authprovider"
 	"github.com/moby/buildkit/util/appcontext"
+	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 )
 
 type buildOptions struct {
-	noCache     bool
-	progress    string
-	pull        bool
-	tag         string
-	folder      string
-	imageIDFile string
-	args        []string
-	quiet       bool
+	noCache        bool
+	progress       string
+	pull           bool
+	tag            string
+	folder         string
+	imageIDFile    string
+	args           []string
+	quiet          bool
+	noResolveImage bool
 }
 
 func Cmd(dockerCli command.Cli) *cobra.Command {
@@ -63,6 +61,7 @@ $ docker app build . -f myapp.dockerapp -t myrepo/myapp:1.0.0`,
 	flags := cmd.Flags()
 	flags.BoolVar(&opts.noCache, "no-cache", false, "Do not use cache when building the App image")
 	flags.StringVar(&opts.progress, "progress", "auto", "Set type of progress output (auto, plain, tty). Use plain to show container output")
+	flags.BoolVar(&opts.noResolveImage, "no-resolve-image", false, "Do not query the registry to resolve image digest")
 	flags.StringVarP(&opts.tag, "tag", "t", "", "App image tag, optionally in the 'repo:tag' format")
 	flags.StringVarP(&opts.folder, "folder", "f", "", "App definition as a .dockerapp directory")
 	flags.BoolVar(&opts.pull, "pull", false, "Always attempt to pull a newer version of the App image")
@@ -196,22 +195,22 @@ func buildImageUsingBuildx(app *types.App, contextPath string, opt buildOptions,
 func fixServiceImageReferences(ctx context.Context, dockerCli command.Cli, bundle *bundle.Bundle, pulledServices []ServiceConfig) error {
 	insecureRegistries, err := internal.InsecureRegistriesFromEngine(dockerCli)
 	if err != nil {
-		return errors2.Wrapf(err, "could not retrieve insecure registries")
+		return errors.Wrapf(err, "could not retrieve insecure registries")
 	}
 	resolver := remotes.CreateResolver(dockerCli.ConfigFile(), insecureRegistries...)
 	for _, service := range pulledServices {
 		image := bundle.Images[service.Name]
 		ref, err := reference.ParseNormalizedNamed(*service.Image)
 		if err != nil {
-			return errors2.Wrapf(err, "could not resolve image %s", *service.Image)
+			return errors.Wrapf(err, "could not resolve image %s", *service.Image)
 		}
 		_, desc, err := resolver.Resolve(ctx, ref.String())
 		if err != nil {
-			return errors2.Wrapf(err, "could not resolve image %s", ref.Name())
+			return errors.Wrapf(err, "could not resolve image %s", ref.Name())
 		}
 		canonical, err := reference.WithDigest(ref, desc.Digest)
 		if err != nil {
-			return errors2.Wrapf(err, "could not resolve image %s", ref.Name())
+			return errors.Wrapf(err, "could not resolve image %s", ref.Name())
 		}
 		image.Image = canonical.String()
 		bundle.Images[service.Name] = image
@@ -251,7 +250,7 @@ func checkMinimalEngineVersion(dockerCli command.Cli) error {
 		return err
 	}
 	if majorVersion < 19 {
-		return errors.New("'build' require docker engine 19.03 or later")
+		return fmt.Errorf("'build' require docker engine 19.03 or later")
 	}
 	return nil
 }