format

type FmtCmd struct {
	// Name is the command name or path
	Name string

	// Args is a list of args to pass to the command.
	Args []string

	// Env is a map of additional env vars to pass to the command.
	Env mg.EnvMap

	// Langs is the list of languages in which the reducer should run
	Langs []mg.Lang

	// Actions is a list of actions on which the reducer is allowed to run.
	// The reducer always runs on the ViewFmt action, even if this list is empty.
	Actions []mg.Action
}

type FmtFunc struct {
	// Fmt receives a copy of the view src and returns the fmt'ed src.
	//
	// Fmt should ideally fail in the face of any uncertainty
	// e.g. if running a command to do the formatting and it prints anything to stderr;
	// it should return an error because commands do not reliably return an error status.
	Fmt func(mx *mg.Ctx, src []byte) ([]byte, error)

	// Langs is the list of languages in which the reducer should run
	Langs []mg.Lang

	// Actions is a list of actions on which the reducer is allowed to run.
	// The reducer always runs on the ViewFmt action, even if this list is empty.
	Actions []mg.Action
}