vite-esbuild-typescript-checker/dist/esm/filesystem/passive-file-system.js

* Speeds up [TypeScript](https://github.com/Microsoft/TypeScript) type checking * Supports [Vue Single File Component](https://vuejs.org/v2/guide/single-file-components.html) * Displays nice error messages with the [code frame](https://babeljs.io/docs/en/

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