MigrateIo.source.lock.present: 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 908-922 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=908&end_line=922

import Base
import mylsm-lsm-store@0.6.0.1/src/DbLock.bend as DbLock
import mylsm-lsm-store@0.6.0.1/src/DurableError.bend as DurableError

def source.lock.present(
  +path: String,
  result: Result<&1, &1, U32 & String, Bool>
) -> IO(Result<&1, &1, Error, SourceSnapshot>):
  match result:
    case Fail{(code, message)}:
      IO.pure(Result<&1, &1, Error, SourceSnapshot>, Fail{HostError{code, message}})
    case Done{False{}}:
      IO.pure(Result<&1, &1, Error, SourceSnapshot>,
        Fail{HostError{2, "database LOCK file is missing"}})
    case Done{True{}}:
      do IO<Result<&1, &1, Error, SourceSnapshot>>:
        acquired : Result<&1, &1, DurableError.Error, DbLock.Lock> <-
          DbLock.acquire(path, "migrate-verify")
        source.locked.manifest(path, acquired)

Uses (15):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  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=IO.pure
  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=Sigma
  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=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/DbLock.bend&name=acquire
  https://jend.leeeet.dev/definition.txt?path=mylsm-lsm-store@0.6.0.1/src/DurableError.bend&name=Error
  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=SourceSnapshot
  https://jend.leeeet.dev/definition.txt?path=mylsm-lsm-store@0.6.0.1/src/transfer/MigrateIo.bend&name=source.locked.manifest