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