crates:
- name: A
  deps:
  - b
  - B
- name: b
  deps:
  - C
- name: B
  deps:
  - C
- name: C
- name: S
  deps:
  - r
  - R
- name: r
  deps:
  - R
- name: R
  deps:
  - T
- name: T
cases:
- cmd: trace A C
  stdout: |
    A -> b -> C
- cmd: trace S T
  stdout: |
    S -> r -> R -> T