introduce build --check

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

Author: ndeloof

cmd/compose/build.go

@@ -46,6 +46,7 @@ type buildOptions struct {
 	builder string
 	deps    bool
 	print   bool
+	check   bool
 }
 
 func (opts buildOptions) toAPIBuildOptions(services []string) (api.BuildOptions, error) {
@@ -80,6 +81,7 @@ func (opts buildOptions) toAPIBuildOptions(services []string) (api.BuildOptions,
 		Deps:     opts.deps,
 		Memory:   int64(opts.memory),
 		Print:    opts.print,
+		Check:    opts.check,
 		SSHs:     SSHKeys,
 		Builder:  builderName,
 	}, nil
@@ -136,6 +138,7 @@ func buildCommand(p *ProjectOptions, dockerCli command.Cli, backend api.Service)
 	flags.StringVar(&p.Progress, "progress", string(buildkit.AutoMode), fmt.Sprintf(`Set type of ui output (%s)`, strings.Join(printerModes, ", ")))
 	flags.MarkHidden("progress") //nolint:errcheck
 	flags.BoolVar(&opts.print, "print", false, "Print equivalent bake file")
+	flags.BoolVar(&opts.check, "check", false, "Check build configuration")
 
 	return cmd
 }

pkg/api/api.go

@@ -157,6 +157,8 @@ type BuildOptions struct {
 	Builder string
 	// Print don't actually run builder but print equivalent build config
 	Print bool
+	// Check let builder validate build configuration
+	Check bool
 }
 
 // Apply mutates project according to build options

pkg/compose/build_bake.go

@@ -172,10 +172,14 @@ func (s *composeService) doBuildBake(ctx context.Context, project *types.Project
 		}
 
 		var output string
+		call := "build"
 		push := options.Push && service.Image != ""
-		if len(service.Build.Platforms) > 1 {
+		switch {
+		case options.Check:
+			call = "lint"
+		case len(service.Build.Platforms) > 1:
 			output = fmt.Sprintf("type=image,push=%t", push)
-		} else {
+		default:
 			output = fmt.Sprintf("type=docker,load=true,push=%t", push)
 		}
 
@@ -207,7 +211,9 @@ func (s *composeService) doBuildBake(ctx context.Context, project *types.Project
 			ShmSize:      build.ShmSize,
 			Ulimits:      toBakeUlimits(build.Ulimits),
 			Entitlements: entitlements,
-			Outputs:      []string{output},
+
+			Outputs: []string{output},
+			Call:    call,
 		}
 		group.Targets = append(group.Targets, serviceName)
 	}