Edit File: copy-file-sync.js
'use strict' const fs = require('graceful-fs') const BUF_LENGTH = 64 * 1024 const _buff = require('../util/buffer')(BUF_LENGTH) function copyFileSync (srcFile, destFile, options) { const overwrite = options.overwrite const errorOnExist = options.errorOnExist const preserveTimestamps = options.preserveTimestamps if (fs.existsSync(destFile)) { if (overwrite) { fs.unlinkSync(destFile) } else if (errorOnExist) { throw new Error(`${destFile} already exists`) } else return } const fdr = fs.openSync(srcFile, 'r') const stat = fs.fstatSync(fdr) const fdw = fs.openSync(destFile, 'w', stat.mode) let bytesRead = 1 let pos = 0 while (bytesRead > 0) { bytesRead = fs.readSync(fdr, _buff, 0, BUF_LENGTH, pos) fs.writeSync(fdw, _buff, 0, bytesRead) pos += bytesRead } if (preserveTimestamps) { fs.futimesSync(fdw, stat.atime, stat.mtime) } fs.closeSync(fdr) fs.closeSync(fdw) } module.exports = copyFileSync
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