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import * as fs from 'fs' |
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import { promisify } from 'util' |
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export const fsOpenPromise = promisify(fs.open) |
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export const fsReadPromise = promisify(fs.read) |
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export const fsClosePromise = promisify(fs.close) |
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export const fsWritePromise = promisify(fs.write) |
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export const fsUnlinkPromise = promisify(fs.unlink) |
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export const fsRenamePromise = promisify(fs.rename) |
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export const fsExistsPromise = promisify(fs.exists) |
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export const fsWriteFilePromise = promisify(fs.writeFile) |
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/** |
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* @returns true if the file existed |
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*/ |
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export function unlinkIfExistSync(filepath: string) { |
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const exist = fs.existsSync(filepath) |
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if (exist) { |
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fs.unlinkSync(filepath) |
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} |
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return exist |
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} |
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/** |
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* @returns true if the file existed |
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*/ |
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export async function unlinkIfExist(filepath: string) { |
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const exist = await fsExistsPromise(filepath) |
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if (exist) { |
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await fsUnlinkPromise(filepath) |
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} |
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return exist |
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} |
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export function processFileSync<T>( |
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filepath: string, |
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flags: string, |
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process: (fileDescriptor: number) => T |
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) { |
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const fileDescriptor = fs.openSync(filepath, flags) |
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try { |
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return process(fileDescriptor) |
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} |
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finally { |
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fs.closeSync(fileDescriptor) |
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} |
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} |
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export async function processFileAsync<T>( |
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filepath: string, |
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flags: string, |
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process: (fileDescriptor: number) => Promise<T> |
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): Promise<T> { |
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const fileDescriptor = await fsOpenPromise(filepath, flags) |
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try { |
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return await process(fileDescriptor) |
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} |
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finally { |
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await fsClosePromise(fileDescriptor) |
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} |
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} |
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63
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export function fillBufferSync( |
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fileDescriptor: number, |
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buffer: Buffer, |
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offset = 0 |
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): Buffer { |
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const bytesRead = fs.readSync( |
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fileDescriptor, |
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buffer, |
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offset, |
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buffer.length - offset, |
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null |
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) |
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return buffer.subarray(0, bytesRead + offset) |
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} |
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export async function fillBufferAsync( |
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fileDescriptor: number, |
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buffer: Buffer, |
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offset = 0 |
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): Promise<Buffer> { |
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const bytesRead = (await fsReadPromise( |
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fileDescriptor, |
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buffer, |
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offset, |
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buffer.length - offset, |
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null |
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)).bytesRead |
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return buffer.subarray(0, bytesRead + offset) |
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} |
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Zazama /
node-id3
