version: '3'

tasks:
  foo:
    preconditions:
      - test -f foo.txt

  impossible:
    preconditions:
      - sh: "[ 1 = 0 ]"
        msg: "1 != 0 obviously!"

  depends_on_impossible:
    deps:
      - impossible

  executes_failing_task_as_cmd:
    cmds:
      - task: impossible