Plan.front: def of ezx@1.11.0.0
Import: import ezx@1.11.0.0/src/fetch/plan.bend as Plan
Lines 894-904 of ezx@1.11.0.0/src/fetch/plan.bend: https://jend.leeeet.dev/read.txt?path=ezx@1.11.0.0/src/fetch/plan.bend&start_line=894&end_line=904

import Base
import ezx@1.11.0.0/src/lock/world.bend as W

# every file of a tree but the last, which a `Lay` writes as the manifest
def front(fs: List<&2, W.Source>) -> List<&2, W.Source>:
  match fs:
    case []:
      []
    case h <> t:
      match t:
        case []:
          []
        case h2 <> t2:
          h <> front(h2 <> t2)

Uses (2):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=ezx@1.11.0.0/src/lock/world.bend&name=Source