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const fs = require('fs');
/**
* Provides symlink loop detection to directory traversal algorithm.
*/
module.exports = {
detectLoop(entry, symlinkCache) {
if (entry && entry.isSymlink) {
const realPath = fs.realpathSync(entry.absolutePath);
if (symlinkCache[realPath]) {
return true;
}
}
return false;
},
initSymlinkCache() {
return {
dir1: {},
dir2: {}
};
},
updateSymlinkCache(symlinkCache, rootEntry1, rootEntry2, loopDetected1, loopDetected2) {
let symlinkCachePath1, symlinkCachePath2;
if (rootEntry1 && !loopDetected1) {
symlinkCachePath1 = rootEntry1.isSymlink ? fs.realpathSync(rootEntry1.absolutePath) : rootEntry1.absolutePath;
symlinkCache.dir1[symlinkCachePath1] = true;
}
if (rootEntry2 && !loopDetected2) {
symlinkCachePath2 = rootEntry2.isSymlink ? fs.realpathSync(rootEntry2.absolutePath) : rootEntry2.absolutePath;
symlinkCache.dir2[symlinkCachePath2] = true;
}
},
cloneSymlinkCache(symlinkCache) {
return {
dir1: shallowClone(symlinkCache.dir1),
dir2: shallowClone(symlinkCache.dir2)
};
},
};
function shallowClone(obj) {
const cloned = {};
Object.keys(obj).forEach(key => {
cloned[key] = obj[key];
});
return cloned;
}
//# sourceMappingURL=loopDetector.js.map
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