Plan.roots.of: def of bolt@1.27.0.0
Import: import bolt@1.27.0.0/src/lint/plan.bend as Plan
Lines 229-237 of bolt@1.27.0.0/src/lint/plan.bend: https://jend.leeeet.dev/read.txt?path=bolt@1.27.0.0/src/lint/plan.bend&start_line=229&end_line=237

import Base
import bolt@1.27.0.0/src/lint/world.bend as W

# the directories the walk read that hold a main.bend, `.` left out
def roots.of(ds: List<&2, String>, +world: W.World) -> List<&2, String>:
  match ds:
    case Nil{}:
      Nil{}
    case Con{+d, rest}:
      +more = roots.of(rest, world)
      +root = Bool.and(Bool.not(String.eq(d, ".")), seen.has(W.listing(world, d), "main.bend"))
      Bool.pick(List<&2, String>, root, d <> more, more)

Uses (9):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.and
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.not
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.pick
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String.eq
  https://jend.leeeet.dev/definition.txt?path=bolt@1.27.0.0/src/lint/plan.bend&name=seen.has
  https://jend.leeeet.dev/definition.txt?path=bolt@1.27.0.0/src/lint/world.bend&name=World
  https://jend.leeeet.dev/definition.txt?path=bolt@1.27.0.0/src/lint/world.bend&name=listing