Run scripts as program

Uses the first command line argument as the name of a script file and tries to run that script in Lua. Falls back to stdin if no file is given. Any remaining args are passed to Lua via the global table arg.

Settings for the Lua command line interface.

If env vars should be ignored, and the interpreter invokes openlibs, then the registry key LUA_NOENV should be set to true before that function is invoked. E.g.:

runner envBehavior action = run $ do
  when (envBehavior == IgnoreEnvVars) $ do
    pushboolean True
    setfield registryindex "LUA_NOENV"
  openlibs
  action

Whether environment variables should be consulted or ignored.