template

type EnvironmentHelper ¶ added in v0.9.0

type EnvironmentHelper struct {
	// contains filtered or unexported fields
}

func (l EnvironmentHelper) Each(cb func(name string, vr expand.Variable) bool)

func (helper EnvironmentHelper) Get(name string) expand.Variable

type InvalidTemplateError ¶

type InvalidTemplateError struct {
	Template string
	Wrapped  error
}

InvalidTemplateError is returned when a variable template is not in a valid format

func (e InvalidTemplateError) Error() string

type MissingRequiredError ¶

type MissingRequiredError struct {
	Variable string
	Reason   string
}

MissingRequiredError is returned when a variable template is missing

func (e MissingRequiredError) Error() string

type Resolver ¶ added in v0.9.0

type Resolver func(string) (string, bool)

Resolver is a user-supplied function which maps from variable names to values. Returns the value as a string and a bool indicating whether the value is present, to distinguish between an empty string and the absence of a value.

type Variable ¶

type Variable struct {
	Name          string
	DefaultValue  string
	PresenceValue string
	Required      bool
}