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74 lines
2.1 KiB
74 lines
2.1 KiB
'use strict';
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const call = require('./call');
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module.exports = stat;
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/**
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* Retrieves the {@link fs.Stats} for the given path. If the path is a symbolic link,
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* then the Stats of the symlink's target are returned instead. If the symlink is broken,
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* then the Stats of the symlink itself are returned.
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*
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* @param {object} fs - Synchronous or Asynchronouse facade for the "fs" module
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* @param {string} path - The path to return stats for
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* @param {function} callback
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*/
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function stat (fs, path, callback) {
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let isSymLink = false;
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call.safe(fs.lstat, path, (err, lstats) => {
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if (err) {
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// fs.lstat threw an eror
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return callback(err);
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}
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try {
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isSymLink = lstats.isSymbolicLink();
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}
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catch (err2) {
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// lstats.isSymbolicLink() threw an error
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// (probably because fs.lstat returned an invalid result)
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return callback(err2);
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}
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if (isSymLink) {
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// Try to resolve the symlink
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symlinkStat(fs, path, lstats, callback);
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}
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else {
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// It's not a symlink, so return the stats as-is
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callback(null, lstats);
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}
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});
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}
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/**
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* Retrieves the {@link fs.Stats} for the target of the given symlink.
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* If the symlink is broken, then the Stats of the symlink itself are returned.
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*
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* @param {object} fs - Synchronous or Asynchronouse facade for the "fs" module
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* @param {string} path - The path of the symlink to return stats for
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* @param {object} lstats - The stats of the symlink
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* @param {function} callback
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*/
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function symlinkStat (fs, path, lstats, callback) {
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call.safe(fs.stat, path, (err, stats) => {
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if (err) {
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// The symlink is broken, so return the stats for the link itself
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return callback(null, lstats);
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}
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try {
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// Return the stats for the resolved symlink target,
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// and override the `isSymbolicLink` method to indicate that it's a symlink
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stats.isSymbolicLink = () => true;
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}
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catch (err2) {
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// Setting stats.isSymbolicLink threw an error
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// (probably because fs.stat returned an invalid result)
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return callback(err2);
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}
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callback(null, stats);
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});
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}
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