mirror of https://github.com/jkjoy/sunpeiwen.git
106 lines
2.6 KiB
JavaScript
106 lines
2.6 KiB
JavaScript
var fs = require('fs');
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var ncp = require('ncp').ncp;
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var path = require('path');
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var rimraf = require('rimraf');
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var mkdirp = require('mkdirp');
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module.exports = mv;
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function mv(source, dest, options, cb){
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if (typeof options === 'function') {
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cb = options;
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options = {};
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}
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var shouldMkdirp = !!options.mkdirp;
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var clobber = options.clobber !== false;
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var limit = options.limit || 16;
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if (shouldMkdirp) {
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mkdirs();
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} else {
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doRename();
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}
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function mkdirs() {
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mkdirp(path.dirname(dest), function(err) {
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if (err) return cb(err);
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doRename();
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});
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}
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function doRename() {
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if (clobber) {
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fs.rename(source, dest, function(err) {
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if (!err) return cb();
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if (err.code !== 'EXDEV') return cb(err);
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moveFileAcrossDevice(source, dest, clobber, limit, cb);
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});
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} else {
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fs.link(source, dest, function(err) {
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if (err) {
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if (err.code === 'EXDEV') {
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moveFileAcrossDevice(source, dest, clobber, limit, cb);
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return;
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}
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if (err.code === 'EISDIR' || err.code === 'EPERM') {
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moveDirAcrossDevice(source, dest, clobber, limit, cb);
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return;
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}
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cb(err);
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return;
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}
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fs.unlink(source, cb);
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});
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}
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}
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}
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function moveFileAcrossDevice(source, dest, clobber, limit, cb) {
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var outFlags = clobber ? 'w' : 'wx';
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var ins = fs.createReadStream(source);
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var outs = fs.createWriteStream(dest, {flags: outFlags});
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ins.on('error', function(err){
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ins.destroy();
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outs.destroy();
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outs.removeListener('close', onClose);
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if (err.code === 'EISDIR' || err.code === 'EPERM') {
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moveDirAcrossDevice(source, dest, clobber, limit, cb);
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} else {
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cb(err);
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}
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});
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outs.on('error', function(err){
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ins.destroy();
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outs.destroy();
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outs.removeListener('close', onClose);
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cb(err);
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});
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outs.once('close', onClose);
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ins.pipe(outs);
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function onClose(){
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fs.unlink(source, cb);
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}
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}
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function moveDirAcrossDevice(source, dest, clobber, limit, cb) {
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var options = {
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stopOnErr: true,
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clobber: false,
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limit: limit,
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};
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if (clobber) {
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rimraf(dest, { disableGlob: true }, function(err) {
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if (err) return cb(err);
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startNcp();
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});
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} else {
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startNcp();
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}
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function startNcp() {
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ncp(source, dest, options, function(errList) {
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if (errList) return cb(errList[0]);
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rimraf(source, { disableGlob: true }, cb);
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});
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}
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}
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