Optional Outputs

Support this:

task foo {
  command { ... }
  output {
    File? optionalOutput = "am_I_even_here.txt"
}

Bonus points? (actually I don’t think I like this):

task foo {
  command { ... }
  output {
    String? optionalOutput = read_string("am_I_even_here.txt")
}

[geoffjentry]

@dheiman These are all true statements. My point was just filing an issue is no guarantee that anyone will do the work of defining the spec changes and that you have the ability to make it happen now. In effect, what I’m saying is you have more ability now than you did before in that one can continue to wait until someone gets around to it (which was always the case) or one can put forth the effort to make it happen themselves (which is new)

[jtratner]

To be clear, this is actually the current cromwell behavior, even though it’s not in the spec, right?