def export

mylsm-lsm-store@0.6.0.1 · src/transfer/BackupOwnerCursorIo.bend:365

import Base
import mylsm-lsm-store@0.6.0.1/src/Fs.bend as Fs
import mylsm-lsm-store@0.6.0.1/src/transfer/BackupCursor.bend as BackupCursor
import mylsm-lsm-store@0.6.0.1/src/transfer/BackupCursorIo.bend as BackupCursorIo
import mylsm-lsm-store@0.6.0.1/src/transfer/BackupIo.bend as BackupIo

365# Exports a retained owner cursor through bounded checksummed backup blocks.
366def export(
367  +destination: String,
368  source: OwnerSource,
369  entry_count: Nat,
370  fuel: Nat
371) -> IO(Result<&1, &1, BackupIo.Error, Unit>):
372  +temporary = destination ++ ".backup-060.tmp"
373  do IO<Result<&1, &1, BackupIo.Error, Unit>>:
374    initial : BackupCursor.Step <- IO.pure(BackupCursor.Step,
375      BackupCursor.start.owner(entry_count))
376    exists : Result<&1, &1, U32 & String, Bool> <-
377      Fs.exists(BackupCursorIo.path.clone(destination))
378    destination.checked(destination, temporary, source, initial, fuel, exists)