Let’s say I have three workflows: WorkflowA, WorkflowB, and WorkflowC.

Each Workflow spawns 10 child jobs using Workflow.append().

I’d like to mix and match A, B, and C in different orders. Something like:

Workflow.new()
|> Workflow.add(:a, WorkflowA.new(%{id: 1}))
|> Workflow.add(:b, WorkflowB.new(%{id: 2}), deps: [:a])
|> Workflow.add(:c, WorkflowC.new(%{id: 3}), deps: [:b])
|> Oban.insert_all()

or

Workflow.new()
|> Workflow.add(:b, WorkflowB.new(%{id: 2}))
|> Workflow.add(:a, WorkflowA.new(%{id: 1}), deps: [:b])
|> Workflow.add(:c, WorkflowC.new(%{id: 3}), deps: [:a])
|> Oban.insert_all()

The use case is allowing the end-user to run each workflow on its own, or all together in a chain.