forked from zhurui/management
105 lines
2.6 KiB
JavaScript
105 lines
2.6 KiB
JavaScript
|
'use strict'
|
||
|
|
// This is adapted from https://github.com/normalize/mz
|
||
|
|
// Copyright (c) 2014-2016 Jonathan Ong me@jongleberry.com and Contributors
|
||
|
|
const u = require('universalify').fromCallback
|
||
|
|
const fs = require('graceful-fs')
|
||
|
|
|
||
|
|
const api = [
|
||
|
|
'access',
|
||
|
|
'appendFile',
|
||
|
|
'chmod',
|
||
|
|
'chown',
|
||
|
|
'close',
|
||
|
|
'copyFile',
|
||
|
|
'fchmod',
|
||
|
|
'fchown',
|
||
|
|
'fdatasync',
|
||
|
|
'fstat',
|
||
|
|
'fsync',
|
||
|
|
'ftruncate',
|
||
|
|
'futimes',
|
||
|
|
'lchown',
|
||
|
|
'lchmod',
|
||
|
|
'link',
|
||
|
|
'lstat',
|
||
|
|
'mkdir',
|
||
|
|
'mkdtemp',
|
||
|
|
'open',
|
||
|
|
'readFile',
|
||
|
|
'readdir',
|
||
|
|
'readlink',
|
||
|
|
'realpath',
|
||
|
|
'rename',
|
||
|
|
'rmdir',
|
||
|
|
'stat',
|
||
|
|
'symlink',
|
||
|
|
'truncate',
|
||
|
|
'unlink',
|
||
|
|
'utimes',
|
||
|
|
'writeFile'
|
||
|
|
].filter(key => {
|
||
|
|
// Some commands are not available on some systems. Ex:
|
||
|
|
// fs.copyFile was added in Node.js v8.5.0
|
||
|
|
// fs.mkdtemp was added in Node.js v5.10.0
|
||
|
|
// fs.lchown is not available on at least some Linux
|
||
|
|
return typeof fs[key] === 'function'
|
||
|
|
})
|
||
|
|
|
||
|
|
// Export all keys:
|
||
|
|
Object.keys(fs).forEach(key => {
|
||
|
|
if (key === 'promises') {
|
||
|
|
// fs.promises is a getter property that triggers ExperimentalWarning
|
||
|
|
// Don't re-export it here, the getter is defined in "lib/index.js"
|
||
|
|
return
|
||
|
|
}
|
||
|
|
exports[key] = fs[key]
|
||
|
|
})
|
||
|
|
|
||
|
|
// Universalify async methods:
|
||
|
|
api.forEach(method => {
|
||
|
|
exports[method] = u(fs[method])
|
||
|
|
})
|
||
|
|
|
||
|
|
// We differ from mz/fs in that we still ship the old, broken, fs.exists()
|
||
|
|
// since we are a drop-in replacement for the native module
|
||
|
|
exports.exists = function (filename, callback) {
|
||
|
|
if (typeof callback === 'function') {
|
||
|
|
return fs.exists(filename, callback)
|
||
|
|
}
|
||
|
|
return new Promise(resolve => {
|
||
|
|
return fs.exists(filename, resolve)
|
||
|
|
})
|
||
|
|
}
|
||
|
|
|
||
|
|
// fs.read() & fs.write need special treatment due to multiple callback args
|
||
|
|
|
||
|
|
exports.read = function (fd, buffer, offset, length, position, callback) {
|
||
|
|
if (typeof callback === 'function') {
|
||
|
|
return fs.read(fd, buffer, offset, length, position, callback)
|
||
|
|
}
|
||
|
|
return new Promise((resolve, reject) => {
|
||
|
|
fs.read(fd, buffer, offset, length, position, (err, bytesRead, buffer) => {
|
||
|
|
if (err) return reject(err)
|
||
|
|
resolve({ bytesRead, buffer })
|
||
|
|
})
|
||
|
|
})
|
||
|
|
}
|
||
|
|
|
||
|
|
// Function signature can be
|
||
|
|
// fs.write(fd, buffer[, offset[, length[, position]]], callback)
|
||
|
|
// OR
|
||
|
|
// fs.write(fd, string[, position[, encoding]], callback)
|
||
|
|
// We need to handle both cases, so we use ...args
|
||
|
|
exports.write = function (fd, buffer, ...args) {
|
||
|
|
if (typeof args[args.length - 1] === 'function') {
|
||
|
|
return fs.write(fd, buffer, ...args)
|
||
|
|
}
|
||
|
|
|
||
|
|
return new Promise((resolve, reject) => {
|
||
|
|
fs.write(fd, buffer, ...args, (err, bytesWritten, buffer) => {
|
||
|
|
if (err) return reject(err)
|
||
|
|
resolve({ bytesWritten, buffer })
|
||
|
|
})
|
||
|
|
})
|
||
|
|
}
|