puppet guard

Guardfile

notification :off

guard :shell do
  watch %r{^(manifests|site\/(profile|role)\/manifests)\/(.+)\.pp$} do
    system("pdk validate puppet") and system("pdk test unit")
  end
  watch %r{^(lib|site\/(profile|role)\/lib)\/(.+)\.rb$} do
    system("pdk validate ruby") and system("pdk test unit")
  end
  watch %r{^spec\/(classes|defines|applications|functions|types|type_aliases|hosts)\/(.+)\.rb$} do
    system("pdk validate ruby") and system("pdk test unit")
  end
end

You could improve this by narrowing the validate to pdk validate puppet and pdk validate ruby respectively. There are no interdependencies between the two checkers.

Thanks David, thats a great suggestion.