pkg/compose: align classic builder implementation with docker/cli

This aligns the implementation closer to the implementation in docker/cli,
with the refactor done in [cli@260f1db]; this removes some direct uses of
the github.com/docker/docker/builder/remotecontext/urlutil package, which
won't be included in the new Moby modules.

There's still some remaining uses in the `dockerFilePath` utility (which
may need to be updated to also account for remote contexts that are not
"git"), so possibly we can remove the use in that utility as well.

[cli@260f1db]: docker/cli@260f1db

Signed-off-by: Sebastiaan van Stijn <[email protected]>

Author: thaJeztah

pkg/compose/build_bake.go

@@ -505,6 +505,7 @@ func dockerFilePath(ctxName string, dockerfile string) string {
 	if dockerfile == "" {
 		return ""
 	}
+	// TODO(thaJeztah): remove uses of urlutil and only conditionally call this dockerFilePath utility
 	if urlutil.IsGitURL(ctxName) {
 		return dockerfile
 	}

pkg/compose/build_classic.go

@@ -34,7 +34,6 @@ import (
 	buildtypes "github.com/docker/docker/api/types/build"
 	"github.com/docker/docker/api/types/container"
 	"github.com/docker/docker/api/types/registry"
-	"github.com/docker/docker/builder/remotecontext/urlutil"
 	"github.com/docker/docker/pkg/jsonmessage"
 	"github.com/docker/docker/pkg/progress"
 	"github.com/docker/docker/pkg/streamformatter"
@@ -48,17 +47,9 @@ func (s *composeService) doBuildClassic(ctx context.Context, project *types.Proj
 		buildCtx      io.ReadCloser
 		dockerfileCtx io.ReadCloser
 		contextDir    string
-		tempDir       string
 		relDockerfile string
-
-		err error
 	)
 
-	dockerfileName := dockerFilePath(service.Build.Context, service.Build.Dockerfile)
-	specifiedContext := service.Build.Context
-	progBuff := s.stdout()
-	buildBuff := s.stdout()
-
 	if len(service.Build.Platforms) > 1 {
 		return "", fmt.Errorf("the classic builder doesn't support multi-arch build, set DOCKER_BUILDKIT=1 to use BuildKit")
 	}
@@ -80,34 +71,51 @@ func (s *composeService) doBuildClassic(ctx context.Context, project *types.Proj
 	}
 	service.Build.Labels[api.ImageBuilderLabel] = "classic"
 
-	switch {
-	case isLocalDir(specifiedContext):
+	dockerfileName := dockerFilePath(service.Build.Context, service.Build.Dockerfile)
+	specifiedContext := service.Build.Context
+	progBuff := s.stdout()
+	buildBuff := s.stdout()
+
+	contextType, err := build.DetectContextType(specifiedContext)
+	if err != nil {
+		return "", err
+	}
+
+	switch contextType {
+	case build.ContextTypeStdin:
+		return "", fmt.Errorf("building from STDIN is not supported")
+	case build.ContextTypeLocal:
 		contextDir, relDockerfile, err = build.GetContextFromLocalDir(specifiedContext, dockerfileName)
-		if err == nil && strings.HasPrefix(relDockerfile, ".."+string(filepath.Separator)) {
-			// Dockerfile is outside of build-context; read the Dockerfile and pass it as dockerfileCtx
+		if err != nil {
+			return "", fmt.Errorf("unable to prepare context: %s", err)
+		}
+		if strings.HasPrefix(relDockerfile, ".."+string(filepath.Separator)) {
+			// Dockerfile is outside build-context; read the Dockerfile and pass it as dockerfileCtx
 			dockerfileCtx, err = os.Open(dockerfileName)
 			if err != nil {
 				return "", fmt.Errorf("unable to open Dockerfile: %w", err)
 			}
 			defer dockerfileCtx.Close() //nolint:errcheck
 		}
-	case urlutil.IsGitURL(specifiedContext):
+	case build.ContextTypeGit:
+		var tempDir string
 		tempDir, relDockerfile, err = build.GetContextFromGitURL(specifiedContext, dockerfileName)
-	case urlutil.IsURL(specifiedContext):
+		if err != nil {
+			return "", fmt.Errorf("unable to prepare context: %w", err)
+		}
+		defer func() {
+			_ = os.RemoveAll(tempDir)
+		}()
+		contextDir = tempDir
+	case build.ContextTypeRemote:
 		buildCtx, relDockerfile, err = build.GetContextFromURL(progBuff, specifiedContext, dockerfileName)
+		if err != nil {
+			return "", fmt.Errorf("unable to prepare context: %w", err)
+		}
 	default:
 		return "", fmt.Errorf("unable to prepare context: path %q not found", specifiedContext)
 	}
 
-	if err != nil {
-		return "", fmt.Errorf("unable to prepare context: %w", err)
-	}
-
-	if tempDir != "" {
-		defer os.RemoveAll(tempDir) //nolint:errcheck
-		contextDir = tempDir
-	}
-
 	// read from a directory into tar archive
 	if buildCtx == nil {
 		excludes, err := build.ReadDockerignore(contextDir)
@@ -125,7 +133,7 @@ func (s *composeService) doBuildClassic(ctx context.Context, project *types.Proj
 		excludes = build.TrimBuildFilesFromExcludes(excludes, relDockerfile, false)
 		buildCtx, err = archive.TarWithOptions(contextDir, &archive.TarOptions{
 			ExcludePatterns: excludes,
-			ChownOpts:       &archive.ChownOpts{},
+			ChownOpts:       &archive.ChownOpts{UID: 0, GID: 0},
 		})
 		if err != nil {
 			return "", err
@@ -145,6 +153,7 @@ func (s *composeService) doBuildClassic(ctx context.Context, project *types.Proj
 		return "", err
 	}
 
+	// Setup an upload progress bar
 	progressOutput := streamformatter.NewProgressOutput(progBuff)
 	body := progress.NewProgressReader(buildCtx, progressOutput, 0, "", "Sending build context to Docker daemon")
 
@@ -166,16 +175,16 @@ func (s *composeService) doBuildClassic(ctx context.Context, project *types.Proj
 			RegistryToken: authConfig.RegistryToken,
 		}
 	}
-	buildOptions := imageBuildOptions(s.dockerCli, project, service, options)
+	buildOpts := imageBuildOptions(s.dockerCli, project, service, options)
 	imageName := api.GetImageNameOrDefault(service, project.Name)
-	buildOptions.Tags = append(buildOptions.Tags, imageName)
-	buildOptions.Dockerfile = relDockerfile
-	buildOptions.AuthConfigs = authConfigs
-	buildOptions.Memory = options.Memory
+	buildOpts.Tags = append(buildOpts.Tags, imageName)
+	buildOpts.Dockerfile = relDockerfile
+	buildOpts.AuthConfigs = authConfigs
+	buildOpts.Memory = options.Memory
 
 	ctx, cancel := context.WithCancel(ctx)
 	defer cancel()
-	response, err := s.apiClient().ImageBuild(ctx, body, buildOptions)
+	response, err := s.apiClient().ImageBuild(ctx, body, buildOpts)
 	if err != nil {
 		return "", err
 	}
@@ -206,11 +215,6 @@ func (s *composeService) doBuildClassic(ctx context.Context, project *types.Proj
 	return imageID, nil
 }
 
-func isLocalDir(c string) bool {
-	_, err := os.Stat(c)
-	return err == nil
-}
-
 func imageBuildOptions(dockerCli command.Cli, project *types.Project, service types.ServiceConfig, options api.BuildOptions) buildtypes.ImageBuildOptions {
 	config := service.Build
 	return buildtypes.ImageBuildOptions{