vite-esbuild-typescript-checker/dist/esm/filesystem/mem-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 { dirname } from 'path';
import { fs as mem } from 'memfs';
import { realFileSystem } from './real-file-system.js';
/**
 * It's an implementation of FileSystem interface which reads and writes to the in-memory file system.
 */ export const memFileSystem = {
    ...realFileSystem,
    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));
    },
    writeFile (path, data) {
        writeFile(realFileSystem.realPath(path), data);
    },
    deleteFile (path) {
        deleteFile(realFileSystem.realPath(path));
    },
    createDir (path) {
        createDir(realFileSystem.realPath(path));
    },
    updateTimes (path, atime, mtime) {
        updateTimes(realFileSystem.realPath(path), atime, mtime);
    },
    clearCache () {
        realFileSystem.clearCache();
    }
};
function exists(path) {
    return mem.existsSync(realFileSystem.normalizePath(path));
}
function readStats(path) {
    return exists(path) ? mem.statSync(realFileSystem.normalizePath(path)) : undefined;
}
function readFile(path, encoding) {
    const stats = readStats(path);
    if (stats && stats.isFile()) {
        return mem.readFileSync(realFileSystem.normalizePath(path), {
            encoding: encoding
        }).toString();
    }
}
function readDir(path) {
    const stats = readStats(path);
    if (stats && stats.isDirectory()) {
        // @ts-ignore
        return mem.readdirSync(realFileSystem.normalizePath(path), {
            withFileTypes: true
        });
    }
    return [];
}
function createDir(path) {
    mem.mkdirSync(realFileSystem.normalizePath(path), {
        recursive: true
    });
}
function writeFile(path, data) {
    if (!exists(dirname(path))) {
        createDir(dirname(path));
    }
    mem.writeFileSync(realFileSystem.normalizePath(path), data);
}
function deleteFile(path) {
    if (exists(path)) {
        mem.unlinkSync(realFileSystem.normalizePath(path));
    }
}
function updateTimes(path, atime, mtime) {
    if (exists(path)) {
        mem.utimesSync(realFileSystem.normalizePath(path), atime, mtime);
    }
}