/*!
 * @nuxt/builder v2.15.8 (c) 2016-2021
 * Released under the MIT License
 * Repository: https://github.com/nuxt/nuxt.js
 * Website: https://nuxtjs.org
*/
'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

const path = require('path');
const chalk = require('chalk');
const chokidar = require('chokidar');
const consola = require('consola');
const fsExtra = require('fs-extra');
const Glob = require('glob');
const hash = require('hash-sum');
const pify = require('pify');
const upath = require('upath');
const lodash = require('lodash');
const utils = require('@nuxt/utils');
const vueApp = require('@nuxt/vue-app');
const webpack = require('@nuxt/webpack');
const ignore = require('ignore');
const serialize = require('serialize-javascript');
const devalue = require('@nuxt/devalue');

function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }

const path__default = /*#__PURE__*/_interopDefaultLegacy(path);
const chalk__default = /*#__PURE__*/_interopDefaultLegacy(chalk);
const chokidar__default = /*#__PURE__*/_interopDefaultLegacy(chokidar);
const consola__default = /*#__PURE__*/_interopDefaultLegacy(consola);
const fsExtra__default = /*#__PURE__*/_interopDefaultLegacy(fsExtra);
const Glob__default = /*#__PURE__*/_interopDefaultLegacy(Glob);
const hash__default = /*#__PURE__*/_interopDefaultLegacy(hash);
const pify__default = /*#__PURE__*/_interopDefaultLegacy(pify);
const upath__default = /*#__PURE__*/_interopDefaultLegacy(upath);
const ignore__default = /*#__PURE__*/_interopDefaultLegacy(ignore);
const serialize__default = /*#__PURE__*/_interopDefaultLegacy(serialize);
const devalue__default = /*#__PURE__*/_interopDefaultLegacy(devalue);

class Ignore {
  constructor (options) {
    this.rootDir = options.rootDir;
    this.ignoreOptions = options.ignoreOptions;
    this.ignoreArray = options.ignoreArray;
    this.addIgnoresRules();
  }

  static get IGNORE_FILENAME () {
    return '.nuxtignore'
  }

  findIgnoreFile () {
    if (!this.ignoreFile) {
      const ignoreFile = path__default['default'].resolve(this.rootDir, Ignore.IGNORE_FILENAME);
      if (fsExtra__default['default'].existsSync(ignoreFile) && fsExtra__default['default'].statSync(ignoreFile).isFile()) {
        this.ignoreFile = ignoreFile;
        this.ignore = ignore__default['default'](this.ignoreOptions);
      }
    }
    return this.ignoreFile
  }

  readIgnoreFile () {
    if (this.findIgnoreFile()) {
      return fsExtra__default['default'].readFileSync(this.ignoreFile, 'utf8')
    }
  }

  addIgnoresRules () {
    const content = this.readIgnoreFile();
    if (content) {
      this.ignore.add(content);
    }
    if (this.ignoreArray && this.ignoreArray.length > 0) {
      if (!this.ignore) {
        this.ignore = ignore__default['default'](this.ignoreOptions);
      }
      this.ignore.add(this.ignoreArray);
    }
  }

  filter (paths) {
    if (this.ignore) {
      return this.ignore.filter([].concat(paths || []))
    }
    return paths
  }

  reload () {
    delete this.ignore;
    delete this.ignoreFile;
    this.addIgnoresRules();
  }
}

class BuildContext {
  constructor (builder) {
    this._builder = builder;
    this.nuxt = builder.nuxt;
    this.options = builder.nuxt.options;
    this.target = builder.nuxt.options.target;
  }

  get buildOptions () {
    return this.options.build
  }

  get plugins () {
    return this._builder.plugins
  }
}

class TemplateContext {
  constructor (builder, options) {
    this.templateFiles = Array.from(builder.template.files);
    this.templateVars = {
      nuxtOptions: options,
      features: options.features,
      extensions: options.extensions
        .map(ext => ext.replace(/^\./, ''))
        .join('|'),
      messages: options.messages,
      splitChunks: options.build.splitChunks,
      uniqBy: lodash.uniqBy,
      isDev: options.dev,
      isTest: options.test,
      isFullStatic: utils.isFullStatic(options),
      debug: options.debug,
      buildIndicator: options.dev && options.build.indicator,
      vue: { config: options.vue.config },
      fetch: options.fetch,
      mode: options.mode,
      router: options.router,
      env: options.env,
      head: options.head,
      store: options.features.store ? options.store : false,
      globalName: options.globalName,
      globals: builder.globals,
      css: options.css,
      plugins: builder.plugins,
      appPath: './App.js',
      layouts: Object.assign({}, options.layouts),
      loading:
        typeof options.loading === 'string'
          ? builder.relativeToBuild(options.srcDir, options.loading)
          : options.loading,
      pageTransition: options.pageTransition,
      layoutTransition: options.layoutTransition,
      rootDir: options.rootDir,
      srcDir: options.srcDir,
      dir: options.dir,
      components: {
        ErrorPage: options.ErrorPage
          ? builder.relativeToBuild(options.ErrorPage)
          : null
      }
    };
  }

  get templateOptions () {
    let lodash = null;

    return {
      imports: {
        serialize: serialize__default['default'],
        serializeFunction: utils.serializeFunction,
        devalue: devalue__default['default'],
        hash: hash__default['default'],
        r: utils.r,
        wp: utils.wp,
        wChunk: utils.wChunk,
        // Legacy support: https://github.com/nuxt/nuxt.js/issues/4350
        _: new Proxy({}, {
          get (target, prop) {
            if (!lodash) {
              consola__default['default'].warn('Avoid using _ inside templates');
              lodash = utils.requireModule('lodash');
            }
            return lodash[prop]
          }
        })
      },
      interpolate: /<%=([\s\S]+?)%>/g
    }
  }
}

const glob = pify__default['default'](Glob__default['default']);
class Builder {
  constructor (nuxt, bundleBuilder) {
    this.nuxt = nuxt;
    this.plugins = [];
    this.options = nuxt.options;
    this.globals = utils.determineGlobals(nuxt.options.globalName, nuxt.options.globals);
    this.watchers = {
      files: null,
      custom: null,
      restart: null
    };

    this.supportedExtensions = ['vue', 'js', ...(this.options.build.additionalExtensions || [])];

    // Helper to resolve build paths
    this.relativeToBuild = (...args) => utils.relativeTo(this.options.buildDir, ...args);

    this._buildStatus = STATUS.INITIAL;

    // Hooks for watch lifecycle
    if (this.options.dev) {
      // Start watching after initial render
      this.nuxt.hook('build:done', () => {
        consola__default['default'].info('Waiting for file changes');
        this.watchClient();
        this.watchRestart();
      });

      // Enable HMR for serverMiddleware
      this.serverMiddlewareHMR();

      // Close hook
      this.nuxt.hook('close', () => this.close());
    }

    if (this.options.build.analyze) {
      this.nuxt.hook('build:done', () => {
        consola__default['default'].warn('Notice: Please do not deploy bundles built with "analyze" mode, they\'re for analysis purposes only.');
      });
    }

    // Resolve template
    this.template = this.options.build.template || vueApp.template;
    if (typeof this.template === 'string') {
      this.template = this.nuxt.resolver.requireModule(this.template).template;
    }

    // Create a new bundle builder
    this.bundleBuilder = this.getBundleBuilder(bundleBuilder);

    this.ignore = new Ignore({
      rootDir: this.options.srcDir,
      ignoreArray: this.options.ignore
    });
  }

  getBundleBuilder (BundleBuilder) {
    if (typeof BundleBuilder === 'object') {
      return BundleBuilder
    }

    const context = new BuildContext(this);

    if (typeof BundleBuilder !== 'function') {
      BundleBuilder = webpack.BundleBuilder;
    }

    return new BundleBuilder(context)
  }

  forGenerate () {
    this.options.target = utils.TARGETS.static;
    this.bundleBuilder.forGenerate();
  }

  async build () {
    // Avoid calling build() method multiple times when dev:true
    if (this._buildStatus === STATUS.BUILD_DONE && this.options.dev) {
      return this
    }
    // If building
    if (this._buildStatus === STATUS.BUILDING) {
      await utils.waitFor(1000);
      return this.build()
    }
    this._buildStatus = STATUS.BUILDING;

    if (this.options.dev) {
      consola__default['default'].info('Preparing project for development');
      consola__default['default'].info('Initial build may take a while');
    } else {
      consola__default['default'].info('Production build');
      if (this.options.render.ssr) {
        consola__default['default'].info(`Bundling for ${chalk__default['default'].bold.yellow('server')} and ${chalk__default['default'].bold.green('client')} side`);
      } else {
        consola__default['default'].info(`Bundling only for ${chalk__default['default'].bold.green('client')} side`);
      }
      consola__default['default'].info(`Target: ${chalk__default['default'].bold.cyan(this.options.target)}`);
    }

    // Wait for nuxt ready
    await this.nuxt.ready();

    // Call before hook
    await this.nuxt.callHook('build:before', this, this.options.build);

    await this.validatePages();

    consola__default['default'].success('Builder initialized');

    consola__default['default'].debug(`App root: ${this.options.srcDir}`);

    // Create or empty .nuxt/, .nuxt/components and .nuxt/dist folders
    await fsExtra__default['default'].emptyDir(utils.r(this.options.buildDir));
    const buildDirs = [utils.r(this.options.buildDir, 'components')];
    if (!this.options.dev) {
      buildDirs.push(
        utils.r(this.options.buildDir, 'dist', 'client'),
        utils.r(this.options.buildDir, 'dist', 'server')
      );
    }
    await Promise.all(buildDirs.map(dir => fsExtra__default['default'].emptyDir(dir)));

    // Call ready hook
    await this.nuxt.callHook('builder:prepared', this, this.options.build);

    // Generate routes and interpret the template files
    await this.generateRoutesAndFiles();

    // Add vue-app template dir to watchers
    this.options.build.watch.push(this.globPathWithExtensions(this.template.dir));

    await this.resolvePlugins();

    // Start bundle build: webpack, rollup, parcel...
    await this.bundleBuilder.build();

    // Flag to set that building is done
    this._buildStatus = STATUS.BUILD_DONE;

    // Call done hook
    await this.nuxt.callHook('build:done', this);

    return this
  }

  // Check if pages dir exists and warn if not
  async validatePages () {
    this._nuxtPages = typeof this.options.build.createRoutes !== 'function';

    if (
      !this._nuxtPages ||
      await fsExtra__default['default'].exists(path__default['default'].resolve(this.options.srcDir, this.options.dir.pages))
    ) {
      return
    }

    const dir = this.options.srcDir;
    if (await fsExtra__default['default'].exists(path__default['default'].join(this.options.srcDir, '..', this.options.dir.pages))) {
      throw new Error(
        `No \`${this.options.dir.pages}\` directory found in ${dir}. Did you mean to run \`nuxt\` in the parent (\`../\`) directory?`
      )
    }

    this._defaultPage = true;
    consola__default['default'].warn(`No \`${this.options.dir.pages}\` directory found in ${dir}. Using the default built-in page.`);
  }

  globPathWithExtensions (path) {
    return `${path}/**/*.{${this.supportedExtensions.join(',')}}`
  }

  createTemplateContext () {
    return new TemplateContext(this, this.options)
  }

  async generateRoutesAndFiles () {
    consola__default['default'].debug('Generating nuxt files');

    this.plugins = Array.from(await this.normalizePlugins());

    const templateContext = this.createTemplateContext();

    await Promise.all([
      this.resolveLayouts(templateContext),
      this.resolveRoutes(templateContext),
      this.resolveStore(templateContext),
      this.resolveMiddleware(templateContext)
    ]);

    this.addOptionalTemplates(templateContext);

    await this.resolveCustomTemplates(templateContext);

    await this.resolveLoadingIndicator(templateContext);

    await this.compileTemplates(templateContext);

    consola__default['default'].success('Nuxt files generated');
  }

  async normalizePlugins () {
    // options.extendPlugins allows for returning a new plugins array
    if (typeof this.options.extendPlugins === 'function') {
      const extendedPlugins = this.options.extendPlugins(this.options.plugins);

      if (Array.isArray(extendedPlugins)) {
        this.options.plugins = extendedPlugins;
      }
    }

    // extendPlugins hook only supports in-place modifying
    await this.nuxt.callHook('builder:extendPlugins', this.options.plugins);

    const modes = ['client', 'server'];
    const modePattern = new RegExp(`\\.(${modes.join('|')})(\\.\\w+)*$`);
    return lodash.uniqBy(
      this.options.plugins.map((p) => {
        if (typeof p === 'string') {
          p = { src: p };
        }
        const pluginBaseName = path__default['default'].basename(p.src, path__default['default'].extname(p.src)).replace(
          /[^a-zA-Z?\d\s:]/g,
          ''
        );

        if (p.ssr === false) {
          p.mode = 'client';
        } else if (p.mode === undefined) {
          p.mode = 'all';
          p.src.replace(modePattern, (_, mode) => {
            if (modes.includes(mode)) {
              p.mode = mode;
            }
          });
        } else if (!['client', 'server', 'all'].includes(p.mode)) {
          consola__default['default'].warn(`Invalid plugin mode (server/client/all): '${p.mode}'. Falling back to 'all'`);
          p.mode = 'all';
        }

        return {
          src: this.nuxt.resolver.resolveAlias(p.src),
          mode: p.mode,
          name: 'nuxt_plugin_' + pluginBaseName + '_' + hash__default['default'](p.src)
        }
      }),
      p => p.name
    )
  }

  addOptionalTemplates (templateContext) {
    if (this.options.build.indicator) {
      templateContext.templateFiles.push('components/nuxt-build-indicator.vue');
    }

    if (this.options.loading !== false) {
      templateContext.templateFiles.push('components/nuxt-loading.vue');
    }
  }

  async resolveFiles (dir, cwd = this.options.srcDir) {
    return this.ignore.filter(await glob(this.globPathWithExtensions(dir), {
      cwd,
      follow: this.options.build.followSymlinks
    }))
  }

  async resolveRelative (dir) {
    const dirPrefix = new RegExp(`^${dir}/`);
    return (await this.resolveFiles(dir)).map(file => ({ src: file.replace(dirPrefix, '') }))
  }

  async resolveLayouts ({ templateVars, templateFiles }) {
    if (!this.options.features.layouts) {
      return
    }

    if (await fsExtra__default['default'].exists(path__default['default'].resolve(this.options.srcDir, this.options.dir.layouts))) {
      for (const file of await this.resolveFiles(this.options.dir.layouts)) {
        const name = file
          .replace(new RegExp(`^${this.options.dir.layouts}/`), '')
          .replace(new RegExp(`\\.(${this.supportedExtensions.join('|')})$`), '');

        // Layout Priority: module.addLayout > .vue file > other extensions
        if (name === 'error') {
          if (!templateVars.components.ErrorPage) {
            templateVars.components.ErrorPage = this.relativeToBuild(
              this.options.srcDir,
              file
            );
          }
        } else if (this.options.layouts[name]) {
          consola__default['default'].warn(`Duplicate layout registration, "${name}" has been registered as "${this.options.layouts[name]}"`);
        } else if (!templateVars.layouts[name] || /\.vue$/.test(file)) {
          templateVars.layouts[name] = this.relativeToBuild(
            this.options.srcDir,
            file
          );
        }
      }
    }

    // If no default layout, create its folder and add the default folder
    if (!templateVars.layouts.default) {
      await fsExtra__default['default'].mkdirp(utils.r(this.options.buildDir, 'layouts'));
      templateFiles.push('layouts/default.vue');
      templateVars.layouts.default = './layouts/default.vue';
    }
  }

  async resolveRoutes ({ templateVars }) {
    consola__default['default'].debug('Generating routes...');
    const { routeNameSplitter, trailingSlash } = this.options.router;

    if (this._defaultPage) {
      templateVars.router.routes = utils.createRoutes({
        files: ['index.vue'],
        srcDir: this.template.dir + '/pages',
        routeNameSplitter,
        trailingSlash
      });
    } else if (this._nuxtPages) {
      // Use nuxt createRoutes bases on pages/
      const files = {};
      const ext = new RegExp(`\\.(${this.supportedExtensions.join('|')})$`);
      for (const page of await this.resolveFiles(this.options.dir.pages)) {
        const key = page.replace(ext, '');
        // .vue file takes precedence over other extensions
        if (/\.vue$/.test(page) || !files[key]) {
          files[key] = page.replace(/(['"])/g, '\\$1');
        }
      }
      templateVars.router.routes = utils.createRoutes({
        files: Object.values(files),
        srcDir: this.options.srcDir,
        pagesDir: this.options.dir.pages,
        routeNameSplitter,
        supportedExtensions: this.supportedExtensions,
        trailingSlash
      });
    } else { // If user defined a custom method to create routes
      templateVars.router.routes = await this.options.build.createRoutes(
        this.options.srcDir
      );
    }

    await this.nuxt.callHook(
      'build:extendRoutes',
      templateVars.router.routes,
      utils.r
    );
    // router.extendRoutes method
    if (typeof this.options.router.extendRoutes === 'function') {
      // let the user extend the routes
      const extendedRoutes = await this.options.router.extendRoutes(
        templateVars.router.routes,
        utils.r
      );
      // Only overwrite routes when something is returned for backwards compatibility
      if (extendedRoutes !== undefined) {
        templateVars.router.routes = extendedRoutes;
      }
    }

    // Make routes accessible for other modules and webpack configs
    this.routes = templateVars.router.routes;
  }

  async resolveStore ({ templateVars, templateFiles }) {
    // Add store if needed
    if (!this.options.features.store || !this.options.store) {
      return
    }

    templateVars.storeModules = (await this.resolveRelative(this.options.dir.store))
      .sort(({ src: p1 }, { src: p2 }) => {
        // modules are sorted from low to high priority (for overwriting properties)
        let res = p1.split('/').length - p2.split('/').length;
        if (res === 0 && p1.includes('/index.')) {
          res = -1;
        } else if (res === 0 && p2.includes('/index.')) {
          res = 1;
        }
        return res
      });

    templateFiles.push('store.js');
  }

  async resolveMiddleware ({ templateVars, templateFiles }) {
    if (!this.options.features.middleware) {
      return
    }

    const middleware = await this.resolveRelative(this.options.dir.middleware);
    const extRE = new RegExp(`\\.(${this.supportedExtensions.join('|')})$`);
    templateVars.middleware = middleware.map(({ src }) => {
      const name = src.replace(extRE, '');
      const dst = this.relativeToBuild(this.options.srcDir, this.options.dir.middleware, src);
      return { name, src, dst }
    });

    templateFiles.push('middleware.js');
  }

  async resolveCustomTemplates (templateContext) {
    // Sanitize custom template files
    this.options.build.templates = this.options.build.templates.map((t) => {
      const src = t.src || t;
      return {
        src: utils.r(this.options.srcDir, src),
        dst: t.dst || path__default['default'].basename(src),
        custom: true,
        ...(typeof t === 'object' ? t : undefined)
      }
    });

    const customTemplateFiles = this.options.build.templates.map(t => t.dst || path__default['default'].basename(t.src || t));

    const templatePaths = lodash.uniq([
      // Modules & user provided templates
      // first custom to keep their index
      ...customTemplateFiles,
      // @nuxt/vue-app templates
      ...templateContext.templateFiles
    ]);

    const appDir = path__default['default'].resolve(this.options.srcDir, this.options.dir.app);

    templateContext.templateFiles = await Promise.all(templatePaths.map(async (file) => {
      // Use custom file if provided in build.templates[]
      const customTemplateIndex = customTemplateFiles.indexOf(file);
      const customTemplate = customTemplateIndex !== -1 ? this.options.build.templates[customTemplateIndex] : null;
      let src = customTemplate ? (customTemplate.src || customTemplate) : utils.r(this.template.dir, file);

      // Allow override templates using a file with same name in ${srcDir}/app
      const customAppFile = path__default['default'].resolve(this.options.srcDir, this.options.dir.app, file);
      const customAppFileExists = customAppFile.startsWith(appDir) && await fsExtra__default['default'].exists(customAppFile);
      if (customAppFileExists) {
        src = customAppFile;
      }

      return {
        src,
        dst: file,
        custom: Boolean(customAppFileExists || customTemplate),
        options: (customTemplate && customTemplate.options) || {}
      }
    }));
  }

  async resolveLoadingIndicator ({ templateFiles }) {
    if (!this.options.loadingIndicator.name) {
      return
    }
    let indicatorPath = path__default['default'].resolve(
      this.template.dir,
      'views/loading',
      this.options.loadingIndicator.name + '.html'
    );

    let customIndicator = false;
    if (!await fsExtra__default['default'].exists(indicatorPath)) {
      indicatorPath = this.nuxt.resolver.resolveAlias(
        this.options.loadingIndicator.name
      );

      if (await fsExtra__default['default'].exists(indicatorPath)) {
        customIndicator = true;
      } else {
        indicatorPath = null;
      }
    }

    if (!indicatorPath) {
      consola__default['default'].error(
        `Could not fetch loading indicator: ${
          this.options.loadingIndicator.name
        }`
      );
      return
    }

    templateFiles.push({
      src: indicatorPath,
      dst: 'loading.html',
      custom: customIndicator,
      options: this.options.loadingIndicator
    });
  }

  async compileTemplates (templateContext) {
    // Prepare template options
    const { templateVars, templateFiles, templateOptions } = templateContext;

    await this.nuxt.callHook('build:templates', {
      templateVars,
      templatesFiles: templateFiles,
      resolve: utils.r
    });

    templateOptions.imports = {
      ...templateOptions.imports,
      resolvePath: this.nuxt.resolver.resolvePath,
      resolveAlias: this.nuxt.resolver.resolveAlias,
      relativeToBuild: this.relativeToBuild
    };

    // Interpret and move template files to .nuxt/
    await Promise.all(
      templateFiles.map(async (templateFile) => {
        const { src, dst, custom } = templateFile;

        // Add custom templates to watcher
        if (custom) {
          this.options.build.watch.push(src);
        }

        // Render template to dst
        const fileContent = await fsExtra__default['default'].readFile(src, 'utf8');

        let content;
        try {
          const templateFunction = lodash.template(fileContent, templateOptions);
          content = utils.stripWhitespace(
            templateFunction({
              ...templateVars,
              ...templateFile
            })
          );
        } catch (err) {
          throw new Error(`Could not compile template ${src}: ${err.message}`)
        }

        // Ensure parent dir exits and write file
        const relativePath = utils.r(this.options.buildDir, dst);
        await fsExtra__default['default'].outputFile(relativePath, content, 'utf8');
      })
    );
  }

  resolvePlugins () {
    // Check plugins exist then set alias to their real path
    return Promise.all(this.plugins.map(async (p) => {
      const ext = '{?(.+([^.])),/index.+([^.])}';
      const pluginFiles = await glob(`${p.src}${ext}`);

      if (!pluginFiles || pluginFiles.length === 0) {
        throw new Error(`Plugin not found: ${p.src}`)
      }

      if (pluginFiles.length > 1 && !utils.isIndexFileAndFolder(pluginFiles)) {
        consola__default['default'].warn({
          message: `Found ${pluginFiles.length} plugins that match the configuration, suggest to specify extension:`,
          additional: '\n' + pluginFiles.map(x => `- ${x}`).join('\n')
        });
      }

      p.src = this.relativeToBuild(p.src);
    }))
  }

  // TODO: Uncomment when generateConfig enabled again
  // async generateConfig() {
  //   const config = path.resolve(this.options.buildDir, 'build.config.js')
  //   const options = omit(this.options, Options.unsafeKeys)
  //   await fsExtra.writeFile(
  //     config,
  //     `export default ${JSON.stringify(options, null, '  ')}`,
  //     'utf8'
  //   )
  // }

  createFileWatcher (patterns, events, listener, watcherCreatedCallback) {
    const options = this.options.watchers.chokidar;
    const watcher = chokidar__default['default'].watch(patterns, options);

    for (const event of events) {
      watcher.on(event, listener);
    }

    // TODO: due to fixes in chokidar this isnt used anymore and could be removed in Nuxt v3
    const { rewatchOnRawEvents } = this.options.watchers;
    if (rewatchOnRawEvents && Array.isArray(rewatchOnRawEvents)) {
      watcher.on('raw', (_event) => {
        if (rewatchOnRawEvents.includes(_event)) {
          watcher.close();

          listener();
          this.createFileWatcher(patterns, events, listener, watcherCreatedCallback);
        }
      });
    }

    if (typeof watcherCreatedCallback === 'function') {
      watcherCreatedCallback(watcher);
    }
  }

  assignWatcher (key) {
    return (watcher) => {
      if (this.watchers[key]) {
        this.watchers[key].close();
      }
      this.watchers[key] = watcher;
    }
  }

  watchClient () {
    let patterns = [
      utils.r(this.options.srcDir, this.options.dir.layouts),
      utils.r(this.options.srcDir, this.options.dir.middleware)
    ];

    if (this.options.store) {
      patterns.push(utils.r(this.options.srcDir, this.options.dir.store));
    }

    if (this._nuxtPages && !this._defaultPage) {
      patterns.push(utils.r(this.options.srcDir, this.options.dir.pages));
    }

    patterns = patterns.map((path, ...args) => upath__default['default'].normalizeSafe(this.globPathWithExtensions(path), ...args));

    const refreshFiles = lodash.debounce(() => this.generateRoutesAndFiles(), 200);

    // Watch for src Files
    this.createFileWatcher(patterns, ['add', 'unlink'], refreshFiles, this.assignWatcher('files'));

    // Watch for custom provided files
    const customPatterns = lodash.uniq([
      ...this.options.build.watch,
      ...Object.values(lodash.omit(this.options.build.styleResources, ['options']))
    ]).map(this.nuxt.resolver.resolveAlias).map(upath__default['default'].normalizeSafe);

    if (customPatterns.length === 0) {
      return
    }

    this.createFileWatcher(customPatterns, ['change'], refreshFiles, this.assignWatcher('custom'));

    // Watch for app/ files
    this.createFileWatcher([utils.r(this.options.srcDir, this.options.dir.app)], ['add', 'change', 'unlink'], refreshFiles, this.assignWatcher('app'));
  }

  serverMiddlewareHMR () {
    // Check nuxt.server dependency
    if (!this.nuxt.server) {
      return
    }

    // Get registered server middleware with path
    const entries = this.nuxt.server.serverMiddlewarePaths();

    // Resolve dependency tree
    const deps = new Set();
    const dep2Entry = {};

    for (const entry of entries) {
      for (const dep of utils.scanRequireTree(entry)) {
        deps.add(dep);
        if (!dep2Entry[dep]) {
          dep2Entry[dep] = new Set();
        }
        dep2Entry[dep].add(entry);
      }
    }

    // Create watcher
    this.createFileWatcher(
      Array.from(deps),
      ['all'],
      lodash.debounce((event, fileName) => {
        if (!dep2Entry[fileName]) {
          return // #7097
        }
        for (const entry of dep2Entry[fileName]) {
          // Reload entry
          let newItem;
          try {
            newItem = this.nuxt.server.replaceMiddleware(entry, entry);
          } catch (error) {
            consola__default['default'].error(error);
            consola__default['default'].error(`[HMR Error]: ${error}`);
          }

          if (!newItem) {
            // Full reload if HMR failed
            return this.nuxt.callHook('watch:restart', { event, path: fileName })
          }

          // Log
          consola__default['default'].info(`[HMR] ${chalk__default['default'].cyan(newItem.route || '/')} (${chalk__default['default'].grey(fileName)})`);
        }
        // Tree may be changed so recreate watcher
        this.serverMiddlewareHMR();
      }, 200),
      this.assignWatcher('serverMiddleware')
    );
  }

  watchRestart () {
    const nuxtRestartWatch = [
      // Custom watchers
      ...this.options.watch
    ].map(this.nuxt.resolver.resolveAlias);

    if (this.ignore.ignoreFile) {
      nuxtRestartWatch.push(this.ignore.ignoreFile);
    }

    if (this.options._envConfig && this.options._envConfig.dotenv) {
      nuxtRestartWatch.push(this.options._envConfig.dotenv);
    }

    // If default page displayed, watch for first page creation
    if (this._nuxtPages && this._defaultPage) {
      nuxtRestartWatch.push(path__default['default'].join(this.options.srcDir, this.options.dir.pages));
    }
    // If store not activated, watch for a file in the directory
    if (!this.options.store) {
      nuxtRestartWatch.push(path__default['default'].join(this.options.srcDir, this.options.dir.store));
    }

    this.createFileWatcher(
      nuxtRestartWatch,
      ['all'],
      async (event, fileName) => {
        if (['add', 'change', 'unlink'].includes(event) === false) {
          return
        }
        await this.nuxt.callHook('watch:fileChanged', this, fileName); // Legacy
        await this.nuxt.callHook('watch:restart', { event, path: fileName });
      },
      this.assignWatcher('restart')
    );
  }

  unwatch () {
    for (const watcher in this.watchers) {
      this.watchers[watcher].close();
    }
  }

  async close () {
    if (this.__closed) {
      return
    }
    this.__closed = true;

    // Unwatch
    this.unwatch();

    // Close bundleBuilder
    if (typeof this.bundleBuilder.close === 'function') {
      await this.bundleBuilder.close();
    }
  }
}

const STATUS = {
  INITIAL: 1,
  BUILD_DONE: 2,
  BUILDING: 3
};

function getBuilder (nuxt) {
  return new Builder(nuxt)
}

function build (nuxt) {
  return getBuilder(nuxt).build()
}

exports.Builder = Builder;
exports.build = build;
exports.getBuilder = getBuilder;