Function PackageOpen

load.go:152–191

PackageOpen opens the package library. Usually passed to Require.

(l *State)

// PackageOpen opens the package library. Usually passed to Require.
func PackageOpen(l *State) int {
	NewLibrary(l, packageLibrary)
	createSearchersTable(l)
	l.SetField(-2, "searchers")
	setPath(l, "path", "LUA_PATH", defaultPath)
	l.PushString(fmt.Sprintf("%c\n%c\n?\n!\n-\n", filepath.Separator, pathListSeparator))
	l.SetField(-2, "config")
	SubTable(l, RegistryIndex, "_LOADED")
	l.SetField(-2, "loaded")
	SubTable(l, RegistryIndex, "_PRELOAD")
	l.SetField(-2, "preload")
	l.PushGlobalTable()
	l.PushValue(-2)
	SetFunctions(l, []RegistryFunction{{"require", func(l *State) int {
		name := CheckString(l, 1)
		l.SetTop(1)
		l.Field(RegistryIndex, "_LOADED")
		l.Field(2, name)
		if l.ToBoolean(-1) {
			return 1
		}
		l.Pop(1)
		findLoader(l, name)
		l.PushString(name)
		l.Insert(-2)
		l.Call(2, 1)
		if !l.IsNil(-1) {
			l.SetField(2, name)
		}
		l.Field(2, name)
		if l.IsNil(-1) {
			l.PushBoolean(true)
			l.PushValue(-1)
			l.SetField(2, name)
		}
		return 1
	}}}, 1)
	l.Pop(1)
	return 1
}