MigrateIo.wal.opened: def of mylsm-lsm-store@0.6.0.1
Import: import mylsm-lsm-store@0.6.0.1/src/transfer/MigrateIo.bend as MigrateIo
Lines 575-588 of mylsm-lsm-store@0.6.0.1/src/transfer/MigrateIo.bend: https://jend.leeeet.dev/read.txt?path=mylsm-lsm-store@0.6.0.1/src/transfer/MigrateIo.bend&start_line=575&end_line=588

import Base
import mylsm-lsm-store@0.6.0.1/src/DbLock.bend as DbLock
import mylsm-lsm-store@0.6.0.1/src/Fs.bend as Fs
import bend-kit-bytes@0.3.2.0/bytes.bend as Bytes

# Reads a bounded WAL file while retaining the exclusive source lock.
def wal.opened(
  lock: DbLock.Lock,
  size: Nat,
  opened: Result<&1, &1, U32 & String, File>,
  path: String
) -> IO(Result<&1, &1, Error, Nat>):
  match opened:
    case Fail{error}: host.failed(lock, error, path)
    case Done{file}:
      do IO<Result<&1, &1, Error, Nat>>:
        read : File & Result<&1, &1, U32 & String, Bytes.Bytes> <-
          Fs.read_at(file, 0, U32.from_nat(size))
        wal.read.pair(read, lock, path)

Uses (15):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=File
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=IO
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=IO.bind
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Pair
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Result
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.from_nat
  https://jend.leeeet.dev/definition.txt?path=bend-kit-bytes@0.3.3.0/bytes.bend&name=Bytes
  https://jend.leeeet.dev/definition.txt?path=mylsm-lsm-store@0.6.0.1/src/DbLock.bend&name=Lock
  https://jend.leeeet.dev/definition.txt?path=mylsm-lsm-store@0.6.0.1/src/Fs.bend&name=read_at
  https://jend.leeeet.dev/definition.txt?path=mylsm-lsm-store@0.6.0.1/src/transfer/MigrateIo.bend&name=Error
  https://jend.leeeet.dev/definition.txt?path=mylsm-lsm-store@0.6.0.1/src/transfer/MigrateIo.bend&name=host.failed
  https://jend.leeeet.dev/definition.txt?path=mylsm-lsm-store@0.6.0.1/src/transfer/MigrateIo.bend&name=wal.read.pair