1.11.9.5 on_success Step Hook

The following will perform the second task only if the first one succeeds:

plan:
- get: foo
- task: unit
  file: foo/unit.yml
  on_success:
    task: alert
    file: foo/alert.yml

Note that this is semantically equivalent to the following:

plan:
- get: foo
- task: unit
  file: foo/unit.yml
- task: alert
  file: foo/alert.yml

The on_success hook is provided mainly for cases where there is an equivalent on_failure, and having them next to each other is more clear.