type Error struct {
// The error message. Message string// An optional error that caused this error. Err error// The step or steplist that caused the error. Step Step Steplist *StepList}
type Step struct {
Name string `yaml:"name"` // The name of the step. Command string `yaml:"command"` // The command to run. Args []string `yaml:"args"` // The arguments to pass to the command.}