25 lines · 876 B · TypeScript
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import { Effect, FileSystem, Path } from "effect";import * as Random from "effect/Random"; export const writeFileStringAtomically = (input: {  readonly filePath: string;  readonly contents: string;}) =>  Effect.scoped(    Effect.gen(function* () {      const fs = yield* FileSystem.FileSystem;      const path = yield* Path.Path;      const tempFileId = yield* Random.nextUUIDv4;      const targetDirectory = path.dirname(input.filePath);       yield* fs.makeDirectory(targetDirectory, { recursive: true });      const tempDirectory = yield* fs.makeTempDirectoryScoped({        directory: targetDirectory,        prefix: `${path.basename(input.filePath)}.`,      });      const tempPath = path.join(tempDirectory, `${tempFileId}.tmp`);       yield* fs.writeFileString(tempPath, input.contents);      yield* fs.rename(tempPath, input.filePath);    }),  );