Ignore.once.go: def of ezx@1.11.0.0
Import: import ezx@1.11.0.0/src/ledger/ignore.bend as Ignore
Lines 217-226 of ezx@1.11.0.0/src/ledger/ignore.bend: https://jend.leeeet.dev/read.txt?path=ezx@1.11.0.0/src/ledger/ignore.bend&start_line=217&end_line=226

import Base
import ezx@1.11.0.0/src/ledger/manifest.bend as M

# each hash once, where it first appears, passing over any `seen` already
# holds. An empty hash names no tree; `M.parse` refuses a dependency with
# none, so that only guards a model built by hand.
def once.go(hs: List<&2, String>, +seen: List<&2, String>) -> List<&2, String>:
  match hs:
    case []:
      []
    case +h <> t:
      +skip = Bool.or(String.is_empty(h), named(seen, h))
      once.put(skip, h, once.go(t, once.seen(skip, h, seen)))

Uses (7):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.or
  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.is_empty
  https://jend.leeeet.dev/definition.txt?path=ezx@1.11.0.0/src/ledger/ignore.bend&name=named
  https://jend.leeeet.dev/definition.txt?path=ezx@1.11.0.0/src/ledger/ignore.bend&name=once.put
  https://jend.leeeet.dev/definition.txt?path=ezx@1.11.0.0/src/ledger/ignore.bend&name=once.seen