78 lines
1.6 KiB
JavaScript
78 lines
1.6 KiB
JavaScript
var fs = require('fs');
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var path = require('path');
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var os = require('os');
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function matchObject(item, str) {
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return Object.prototype.toString.call(item)
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=== '[object ' + str + ']';
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}
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function checkStat(name, fn) {
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try {
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return fn(name);
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} catch (err) {
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if (/^(ENOENT|EPERM|EACCES)$/.test(err.code)) {
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if (err.code !== 'ENOENT') {
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console.warn('Warning: Cannot access %s', name);
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}
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return false;
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}
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throw err;
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}
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}
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var is = {
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nil: function(item) {
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return item == null;
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},
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array: function(item) {
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return Array.isArray(item);
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},
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emptyObject: function(item) {
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for (var key in item) {
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return false;
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}
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return true;
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},
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buffer: function(item) {
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return Buffer.isBuffer(item);
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},
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regExp: function(item) {
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return matchObject(item, 'RegExp');
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},
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string: function(item) {
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return matchObject(item, 'String');
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},
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func: function(item) {
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return typeof item === 'function';
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},
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number: function(item) {
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return matchObject(item, 'Number');
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},
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exists: function(name) {
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return fs.existsSync(name);
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},
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file: function(name) {
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return checkStat(name, function(n) {
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return fs.statSync(n).isFile()
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});
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},
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samePath: function(a, b) {
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return path.resolve(a) === path.resolve(b);
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},
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directory: function(name) {
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return checkStat(name, function(n) {
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return fs.statSync(n).isDirectory()
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});
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},
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symbolicLink: function(name) {
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return checkStat(name, function(n) {
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return fs.lstatSync(n).isSymbolicLink();
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});
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},
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windows: function() {
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return os.platform() === 'win32';
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}
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};
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module.exports = is;
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