// An Actor runs an action.
type Actor interface {
	Act(*Builder, context.Context, *Action) error
}

// An ActorFunc is an Actor that calls the function.
type ActorFunc func(*Builder, context.Context, *Action) error

func (f ActorFunc) Act(b *Builder, ctx context.Context, a *Action) error {
	return f(b, ctx, a)
}

// An Action represents a single action in the action graph.

		p.Internal.ExeName = src[:len(src)-len(".go")]
	} else {
		p.Internal.ExeName = path.Base(p.ImportPath)
	}

	a1 := b.LinkAction(work.ModeBuild, work.ModeBuild, p)
	a := &work.Action{Mode: "go run", Actor: work.ActorFunc(buildRunProgram), Args: cmdArgs, Deps: []*work.Action{a1}}
	b.Do(ctx, a)
}

// shouldUseOutsideModuleMode returns whether 'go run' will load packages in

		cleanAction = &work.Action{
			Mode:       "test clean",
			Actor:      work.ActorFunc(builderCleanTest),
			Deps:       []*work.Action{runAction},
			Package:    p,
			IgnoreFail: true, // clean even if test failed
			Objdir:     testDir,
		}
		printAction = &work.Action{
			Mode:       "test print",
			Actor:      work.ActorFunc(builderPrintTest),
			Deps:       []*work.Action{cleanAction},
			Package:    p,