effect

type CommandExecutor struct{}

type Execution struct {

	// Command is the command to run.
	Command string

	// Args is the arguments to the command.
	Args []string

	// Dir is the working directory the command is run in.  Defaults to the current working directory.
	Dir string

	// Environment is the environment variables that the command is run with.  Defaults to current environment.
	Env []string

	// Stdin is the Reader to use for stdin.
	Stdin io.Reader

	// Stdout is the Writer to use for stdout.
	Stdout io.Writer

	// Stderr is the Writer to use for stderr.
	Stderr io.Writer
}

type Executor interface {

	// Execute executes the command described in the Execution.
	Execute(execution Execution) error
}

type TTYExecutor struct{}