utils

export declare const toFile: {
  (
    path: string,
    options?: (OpenFileOptions & { readonly batchWindow?: DurationInput | undefined }) | undefined
  ): <Message>(self: Logger.Logger<Message, string>) => Effect<Logger.Logger<Message, void>, PlatformError, any>
  <Message>(
    self: Logger.Logger<Message, string>,
    path: string,
    options?: (OpenFileOptions & { readonly batchWindow?: DurationInput | undefined }) | undefined
  ): Effect<Logger.Logger<Message, void>, PlatformError, any>
}

import { PlatformLogger } from "@effect/platform"
import { NodeFileSystem, NodeRuntime } from "@effect/platform-node"
import { Effect, Layer, Logger } from "effect"

const fileLogger = Logger.logfmtLogger.pipe(PlatformLogger.toFile("/tmp/log.txt"))
const LoggerLive = Logger.replaceScoped(Logger.defaultLogger, fileLogger).pipe(Layer.provide(NodeFileSystem.layer))

Effect.log("a").pipe(
  Effect.zipRight(Effect.log("b")),
  Effect.zipRight(Effect.log("c")),
  Effect.provide(LoggerLive),
  NodeRuntime.runMain
)