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Diffstat (limited to 'node_modules/fs-extra/lib/fs/index.js')
-rw-r--r-- | node_modules/fs-extra/lib/fs/index.js | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/node_modules/fs-extra/lib/fs/index.js b/node_modules/fs-extra/lib/fs/index.js new file mode 100644 index 0000000..1821fd0 --- /dev/null +++ b/node_modules/fs-extra/lib/fs/index.js @@ -0,0 +1,107 @@ +// 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', + '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 => { + 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) +// so we need to handle both cases +exports.write = function (fd, buffer, a, b, c, callback) { + if (typeof arguments[arguments.length - 1] === 'function') { + return fs.write(fd, buffer, a, b, c, callback) + } + + // Check for old, depricated fs.write(fd, string[, position[, encoding]], callback) + if (typeof buffer === 'string') { + return new Promise((resolve, reject) => { + fs.write(fd, buffer, a, b, (err, bytesWritten, buffer) => { + if (err) return reject(err) + resolve({ bytesWritten, buffer }) + }) + }) + } + + return new Promise((resolve, reject) => { + fs.write(fd, buffer, a, b, c, (err, bytesWritten, buffer) => { + if (err) return reject(err) + resolve({ bytesWritten, buffer }) + }) + }) +} |