bake: add --load and --push shorthands for --set

Signed-off-by: Tibor Vass <tibor@docker.com>

README.md

@@ -507,10 +507,12 @@ Options:
 | Flag | Description |
 | --- | --- |
 |  -f, --file stringArray  | Build definition file
+|      --load              | Shorthand for --set=*.output=type=docker
 |      --no-cache          | Do not use cache when building the image
 |      --print             | Print the options without building
 |      --progress string   | Set type of progress output (auto, plain, tty). Use plain to show container output (default "auto")
 |      --pull              | Always attempt to pull a newer version of the image
+|      --push              | Shorthand for --set=*.output=type=registry
 |      --set stringArray   | Override target value (eg: targetpattern.key=value)
 
 #### `-f, --file FILE`

commands/bake.go

@@ -37,7 +37,17 @@ func runBake(dockerCli command.Cli, targets []string, in bakeOptions) error {
 		targets = []string{"default"}
 	}
 
-	m, err := bake.ReadTargets(ctx, in.files, targets, in.overrides)
+	overrides := in.overrides
+	if in.exportPush {
+		if in.exportLoad {
+			return errors.Errorf("push and load may not be set together at the moment")
+		}
+		overrides = append(overrides, "*.output=type=registry")
+	} else if in.exportLoad {
+		overrides = append(overrides, "*.output=type=docker")
+	}
+
+	m, err := bake.ReadTargets(ctx, in.files, targets, overrides)
 	if err != nil {
 		return err
 	}
@@ -100,6 +110,8 @@ func bakeCmd(dockerCli command.Cli) *cobra.Command {
 	flags.StringArrayVarP(&options.files, "file", "f", []string{}, "Build definition file")
 	flags.BoolVar(&options.printOnly, "print", false, "Print the options without building")
 	flags.StringArrayVar(&options.overrides, "set", nil, "Override target value (eg: targetpattern.key=value)")
+	flags.BoolVar(&options.exportPush, "push", false, "Shorthand for --set=*.output=type=registry")
+	flags.BoolVar(&options.exportLoad, "load", false, "Shorthand for --set=*.output=type=docker")
 
 	commonFlags(&options.commonOptions, flags)
 

commands/build.go

@@ -38,9 +38,6 @@ type buildOptions struct {
 	extraHosts  []string
 	networkMode string
 
-	exportPush bool
-	exportLoad bool
-
 	// unimplemented
 	squash bool
 	quiet  bool
@@ -68,6 +65,8 @@ type commonOptions struct {
 	noCache    bool
 	progress   string
 	pull       bool
+	exportPush bool
+	exportLoad bool
 }
 
 func runBuild(dockerCli command.Cli, in buildOptions) error {