PlatformLogger

1 exports Added in v1.0.0 Source

Other

toFile

Added in v1.0.0 Source

Create a Logger from another string Logger that writes to the specified file.

Signature

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

Example

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,
)