gep

type GepParts struct {
	// A slice of parts. Elements are all generated by calling to
	// Interface.GenXxxPart()
	Parts villa.Slice

	// All imported package names
	Imports villa.StrSet
	// All included and required paths
	Depends villa.StrSet

	// Whether the root source is marked as includeonly
	IncludeOnly bool
}

type Interface interface {
	// Load a file with specified path. The path is extracted from
	// include/require primitives
	Load(path villa.Path) (string, error)

	// Generate a part object for a raw source
	GenRawPart(src string) interface{}

	// Generate a part object for a code source <% %>
	GenCodePart(src string) interface{}

	// Generate a part object for a evaluation source <%= %>
	GenEvalPart(src string) interface{}

	// Output an error message
	Error(message string)
}