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