"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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/**
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* It's an implementation of FileSystem interface which reads from the real file system, but write to the in-memory file system.
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*
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* @param memFileSystem
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* @param realFileSystem
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*/
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function createPassiveFileSystem(memFileSystem, realFileSystem) {
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function exists(path) {
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return realFileSystem.exists(path) || memFileSystem.exists(path);
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}
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function readFile(path, encoding) {
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const fsStats = realFileSystem.readStats(path);
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const memStats = memFileSystem.readStats(path);
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if (fsStats && memStats) {
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return fsStats.mtimeMs > memStats.mtimeMs
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? realFileSystem.readFile(path, encoding)
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: memFileSystem.readFile(path, encoding);
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}
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else if (fsStats) {
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return realFileSystem.readFile(path, encoding);
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}
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else if (memStats) {
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return memFileSystem.readFile(path, encoding);
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}
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}
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function readDir(path) {
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const fsDirents = realFileSystem.readDir(path);
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const memDirents = memFileSystem.readDir(path);
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// merge list of dirents from fs and mem
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return fsDirents
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.filter((fsDirent) => !memDirents.some((memDirent) => memDirent.name === fsDirent.name))
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.concat(memDirents);
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}
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function readStats(path) {
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const fsStats = realFileSystem.readStats(path);
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const memStats = memFileSystem.readStats(path);
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if (fsStats && memStats) {
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return fsStats.mtimeMs > memStats.mtimeMs ? fsStats : memStats;
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}
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else if (fsStats) {
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return fsStats;
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}
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else if (memStats) {
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return memStats;
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}
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}
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return Object.assign(Object.assign({}, memFileSystem), { exists(path) {
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return exists(realFileSystem.realPath(path));
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},
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readFile(path, encoding) {
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return readFile(realFileSystem.realPath(path), encoding);
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},
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readDir(path) {
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return readDir(realFileSystem.realPath(path));
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},
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readStats(path) {
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return readStats(realFileSystem.realPath(path));
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},
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realPath(path) {
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return realFileSystem.realPath(path);
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},
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clearCache() {
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realFileSystem.clearCache();
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} });
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}
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exports.createPassiveFileSystem = createPassiveFileSystem;
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