305 lines
9.5 KiB
Plaintext
305 lines
9.5 KiB
Plaintext
var fs = require('fs');
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var path = require('path');
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var common = require('./common');
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common.register('cp', _cp, {
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cmdOptions: {
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'f': '!no_force',
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'n': 'no_force',
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'u': 'update',
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'R': 'recursive',
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'r': 'recursive',
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'L': 'followsymlink',
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'P': 'noFollowsymlink',
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},
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wrapOutput: false,
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});
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// Buffered file copy, synchronous
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// (Using readFileSync() + writeFileSync() could easily cause a memory overflow
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// with large files)
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function copyFileSync(srcFile, destFile, options) {
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if (!fs.existsSync(srcFile)) {
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common.error('copyFileSync: no such file or directory: ' + srcFile);
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}
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var isWindows = process.platform === 'win32';
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// Check the mtimes of the files if the '-u' flag is provided
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try {
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if (options.update && common.statFollowLinks(srcFile).mtime < fs.statSync(destFile).mtime) {
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return;
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}
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} catch (e) {
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// If we're here, destFile probably doesn't exist, so just do a normal copy
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}
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if (common.statNoFollowLinks(srcFile).isSymbolicLink() && !options.followsymlink) {
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try {
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common.statNoFollowLinks(destFile);
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common.unlinkSync(destFile); // re-link it
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} catch (e) {
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// it doesn't exist, so no work needs to be done
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}
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var symlinkFull = fs.readlinkSync(srcFile);
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fs.symlinkSync(symlinkFull, destFile, isWindows ? 'junction' : null);
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} else {
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var buf = common.buffer();
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var bufLength = buf.length;
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var bytesRead = bufLength;
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var pos = 0;
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var fdr = null;
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var fdw = null;
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try {
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fdr = fs.openSync(srcFile, 'r');
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} catch (e) {
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/* istanbul ignore next */
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common.error('copyFileSync: could not read src file (' + srcFile + ')');
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}
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try {
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fdw = fs.openSync(destFile, 'w');
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} catch (e) {
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/* istanbul ignore next */
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common.error('copyFileSync: could not write to dest file (code=' + e.code + '):' + destFile);
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}
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while (bytesRead === bufLength) {
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bytesRead = fs.readSync(fdr, buf, 0, bufLength, pos);
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fs.writeSync(fdw, buf, 0, bytesRead);
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pos += bytesRead;
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}
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fs.closeSync(fdr);
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fs.closeSync(fdw);
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fs.chmodSync(destFile, common.statFollowLinks(srcFile).mode);
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}
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}
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// Recursively copies 'sourceDir' into 'destDir'
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// Adapted from https://github.com/ryanmcgrath/wrench-js
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//
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// Copyright (c) 2010 Ryan McGrath
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// Copyright (c) 2012 Artur Adib
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//
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// Licensed under the MIT License
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// http://www.opensource.org/licenses/mit-license.php
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function cpdirSyncRecursive(sourceDir, destDir, currentDepth, opts) {
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if (!opts) opts = {};
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// Ensure there is not a run away recursive copy
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if (currentDepth >= common.config.maxdepth) return;
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currentDepth++;
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var isWindows = process.platform === 'win32';
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// Create the directory where all our junk is moving to; read the mode of the
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// source directory and mirror it
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try {
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fs.mkdirSync(destDir);
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} catch (e) {
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// if the directory already exists, that's okay
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if (e.code !== 'EEXIST') throw e;
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}
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var files = fs.readdirSync(sourceDir);
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for (var i = 0; i < files.length; i++) {
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var srcFile = sourceDir + '/' + files[i];
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var destFile = destDir + '/' + files[i];
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var srcFileStat = common.statNoFollowLinks(srcFile);
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var symlinkFull;
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if (opts.followsymlink) {
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if (cpcheckcycle(sourceDir, srcFile)) {
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// Cycle link found.
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console.error('Cycle link found.');
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symlinkFull = fs.readlinkSync(srcFile);
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fs.symlinkSync(symlinkFull, destFile, isWindows ? 'junction' : null);
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continue;
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}
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}
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if (srcFileStat.isDirectory()) {
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/* recursion this thing right on back. */
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cpdirSyncRecursive(srcFile, destFile, currentDepth, opts);
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} else if (srcFileStat.isSymbolicLink() && !opts.followsymlink) {
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symlinkFull = fs.readlinkSync(srcFile);
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try {
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common.statNoFollowLinks(destFile);
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common.unlinkSync(destFile); // re-link it
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} catch (e) {
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// it doesn't exist, so no work needs to be done
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}
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fs.symlinkSync(symlinkFull, destFile, isWindows ? 'junction' : null);
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} else if (srcFileStat.isSymbolicLink() && opts.followsymlink) {
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srcFileStat = common.statFollowLinks(srcFile);
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if (srcFileStat.isDirectory()) {
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cpdirSyncRecursive(srcFile, destFile, currentDepth, opts);
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} else {
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copyFileSync(srcFile, destFile, opts);
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}
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} else {
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/* At this point, we've hit a file actually worth copying... so copy it on over. */
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if (fs.existsSync(destFile) && opts.no_force) {
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common.log('skipping existing file: ' + files[i]);
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} else {
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copyFileSync(srcFile, destFile, opts);
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}
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}
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} // for files
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// finally change the mode for the newly created directory (otherwise, we
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// couldn't add files to a read-only directory).
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var checkDir = common.statFollowLinks(sourceDir);
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fs.chmodSync(destDir, checkDir.mode);
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} // cpdirSyncRecursive
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// Checks if cureent file was created recently
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function checkRecentCreated(sources, index) {
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var lookedSource = sources[index];
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return sources.slice(0, index).some(function (src) {
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return path.basename(src) === path.basename(lookedSource);
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});
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}
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function cpcheckcycle(sourceDir, srcFile) {
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var srcFileStat = common.statNoFollowLinks(srcFile);
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if (srcFileStat.isSymbolicLink()) {
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// Do cycle check. For example:
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// $ mkdir -p 1/2/3/4
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// $ cd 1/2/3/4
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// $ ln -s ../../3 link
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// $ cd ../../../..
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// $ cp -RL 1 copy
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var cyclecheck = common.statFollowLinks(srcFile);
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if (cyclecheck.isDirectory()) {
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var sourcerealpath = fs.realpathSync(sourceDir);
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var symlinkrealpath = fs.realpathSync(srcFile);
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var re = new RegExp(symlinkrealpath);
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if (re.test(sourcerealpath)) {
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return true;
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}
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}
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}
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return false;
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}
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//@
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//@ ### cp([options,] source [, source ...], dest)
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//@ ### cp([options,] source_array, dest)
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//@
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//@ Available options:
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//@
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//@ + `-f`: force (default behavior)
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//@ + `-n`: no-clobber
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//@ + `-u`: only copy if `source` is newer than `dest`
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//@ + `-r`, `-R`: recursive
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//@ + `-L`: follow symlinks
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//@ + `-P`: don't follow symlinks
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//@
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//@ Examples:
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//@
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//@ ```javascript
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//@ cp('file1', 'dir1');
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//@ cp('-R', 'path/to/dir/', '~/newCopy/');
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//@ cp('-Rf', '/tmp/*', '/usr/local/*', '/home/tmp');
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//@ cp('-Rf', ['/tmp/*', '/usr/local/*'], '/home/tmp'); // same as above
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//@ ```
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//@
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//@ Copies files.
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function _cp(options, sources, dest) {
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// If we're missing -R, it actually implies -L (unless -P is explicit)
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if (options.followsymlink) {
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options.noFollowsymlink = false;
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}
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if (!options.recursive && !options.noFollowsymlink) {
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options.followsymlink = true;
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}
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// Get sources, dest
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if (arguments.length < 3) {
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common.error('missing <source> and/or <dest>');
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} else {
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sources = [].slice.call(arguments, 1, arguments.length - 1);
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dest = arguments[arguments.length - 1];
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}
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var destExists = fs.existsSync(dest);
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var destStat = destExists && common.statFollowLinks(dest);
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// Dest is not existing dir, but multiple sources given
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if ((!destExists || !destStat.isDirectory()) && sources.length > 1) {
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common.error('dest is not a directory (too many sources)');
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}
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// Dest is an existing file, but -n is given
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if (destExists && destStat.isFile() && options.no_force) {
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return new common.ShellString('', '', 0);
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}
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sources.forEach(function (src, srcIndex) {
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if (!fs.existsSync(src)) {
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if (src === '') src = "''"; // if src was empty string, display empty string
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common.error('no such file or directory: ' + src, { continue: true });
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return; // skip file
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}
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var srcStat = common.statFollowLinks(src);
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if (!options.noFollowsymlink && srcStat.isDirectory()) {
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if (!options.recursive) {
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// Non-Recursive
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common.error("omitting directory '" + src + "'", { continue: true });
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} else {
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// Recursive
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// 'cp /a/source dest' should create 'source' in 'dest'
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var newDest = (destStat && destStat.isDirectory()) ?
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path.join(dest, path.basename(src)) :
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dest;
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try {
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common.statFollowLinks(path.dirname(dest));
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cpdirSyncRecursive(src, newDest, 0, { no_force: options.no_force, followsymlink: options.followsymlink });
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} catch (e) {
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/* istanbul ignore next */
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common.error("cannot create directory '" + dest + "': No such file or directory");
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}
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}
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} else {
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// If here, src is a file
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// When copying to '/path/dir':
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// thisDest = '/path/dir/file1'
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var thisDest = dest;
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if (destStat && destStat.isDirectory()) {
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thisDest = path.normalize(dest + '/' + path.basename(src));
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}
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var thisDestExists = fs.existsSync(thisDest);
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if (thisDestExists && checkRecentCreated(sources, srcIndex)) {
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// cannot overwrite file created recently in current execution, but we want to continue copying other files
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if (!options.no_force) {
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common.error("will not overwrite just-created '" + thisDest + "' with '" + src + "'", { continue: true });
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}
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return;
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}
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if (thisDestExists && options.no_force) {
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return; // skip file
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}
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if (path.relative(src, thisDest) === '') {
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// a file cannot be copied to itself, but we want to continue copying other files
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common.error("'" + thisDest + "' and '" + src + "' are the same file", { continue: true });
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return;
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}
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copyFileSync(src, thisDest, options);
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}
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}); // forEach(src)
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return new common.ShellString('', common.state.error, common.state.errorCode);
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}
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module.exports = _cp;
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