Camber.groups.prepare: def of bend-kit-camber@0.15.0.1
Import: import bend-kit-camber@0.15.0.1/camber.bend as Camber
Lines 559-568 of bend-kit-camber@0.15.0.1/camber.bend: https://jend.leeeet.dev/read.txt?path=bend-kit-camber@0.15.0.1/camber.bend&start_line=559&end_line=568

import Base

def groups.prepare(~P: Data, groups: List<&2, Group<P>>, +all: List<&2, Group<P>>) -> Result<&2, &2, RegistrationError, List<&2, GroupPlan<P>>>:
  match groups:
    case Nil{}:
      Done{Nil{}}
    case Group{id, ancestors, policy} <> rest:
      +ids = List.append(&2, U32, ancestors, [id])
      do Result<&2, &2, RegistrationError, List<&2, GroupPlan<P>>>:
        policies : List<&2, P> <- routes.policies(~P, groups.policies(~P, ids, all, Nil{}), ids)
        plans : List<&2, GroupPlan<P>> <- groups.prepare(~P, rest, all)
        return GroupPlan{ids, policies} <> plans

Uses (11):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List.append
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Result
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Result.bind
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Result.pure
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=bend-kit-camber@0.15.0.1/camber.bend&name=Group
  https://jend.leeeet.dev/definition.txt?path=bend-kit-camber@0.15.0.1/camber.bend&name=GroupPlan
  https://jend.leeeet.dev/definition.txt?path=bend-kit-camber@0.15.0.1/camber.bend&name=RegistrationError
  https://jend.leeeet.dev/definition.txt?path=bend-kit-camber@0.15.0.1/camber.bend&name=groups.policies
  https://jend.leeeet.dev/definition.txt?path=bend-kit-camber@0.15.0.1/camber.bend&name=routes.policies