@angular-devkit/build-angular
Version:
Angular Webpack Build Facade
219 lines • 29.2 kB
JavaScript
;
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.augmentIndexHtml = void 0;
const node_crypto_1 = require("node:crypto");
const node_path_1 = require("node:path");
const load_esm_1 = require("../load-esm");
const html_rewriting_stream_1 = require("./html-rewriting-stream");
/*
* Helper function used by the IndexHtmlWebpackPlugin.
* Can also be directly used by builder, e. g. in order to generate an index.html
* after processing several configurations in order to build different sets of
* bundles for differential serving.
*/
async function augmentIndexHtml(params) {
const { loadOutputFile, files, entrypoints, sri, deployUrl = '', lang, baseHref, html } = params;
const warnings = [];
const errors = [];
let { crossOrigin = 'none' } = params;
if (sri && crossOrigin === 'none') {
crossOrigin = 'anonymous';
}
const stylesheets = new Set();
const scripts = new Map();
// Sort files in the order we want to insert them by entrypoint
for (const [entrypoint, isModule] of entrypoints) {
for (const { extension, file, name } of files) {
if (name !== entrypoint || scripts.has(file) || stylesheets.has(file)) {
continue;
}
switch (extension) {
case '.js':
// Also, non entrypoints need to be loaded as no module as they can contain problematic code.
scripts.set(file, isModule);
break;
case '.mjs':
if (!isModule) {
// It would be very confusing to link an `*.mjs` file in a non-module script context,
// so we disallow it entirely.
throw new Error('`.mjs` files *must* set `isModule` to `true`.');
}
scripts.set(file, true /* isModule */);
break;
case '.css':
stylesheets.add(file);
break;
}
}
}
let scriptTags = [];
for (const [src, isModule] of scripts) {
const attrs = [`src="${deployUrl}${src}"`];
// This is also need for non entry-points as they may contain problematic code.
if (isModule) {
attrs.push('type="module"');
}
else {
attrs.push('defer');
}
if (crossOrigin !== 'none') {
attrs.push(`crossorigin="${crossOrigin}"`);
}
if (sri) {
const content = await loadOutputFile(src);
attrs.push(generateSriAttributes(content));
}
scriptTags.push(`<script ${attrs.join(' ')}></script>`);
}
let linkTags = [];
for (const src of stylesheets) {
const attrs = [`rel="stylesheet"`, `href="${deployUrl}${src}"`];
if (crossOrigin !== 'none') {
attrs.push(`crossorigin="${crossOrigin}"`);
}
if (sri) {
const content = await loadOutputFile(src);
attrs.push(generateSriAttributes(content));
}
linkTags.push(`<link ${attrs.join(' ')}>`);
}
if (params.hints?.length) {
for (const hint of params.hints) {
const attrs = [`rel="${hint.mode}"`, `href="${deployUrl}${hint.url}"`];
if (hint.mode !== 'modulepreload' && crossOrigin !== 'none') {
// Value is considered anonymous by the browser when not present or empty
attrs.push(crossOrigin === 'anonymous' ? 'crossorigin' : `crossorigin="${crossOrigin}"`);
}
if (hint.mode === 'preload' || hint.mode === 'prefetch') {
switch ((0, node_path_1.extname)(hint.url)) {
case '.js':
attrs.push('as="script"');
break;
case '.css':
attrs.push('as="style"');
break;
default:
if (hint.as) {
attrs.push(`as="${hint.as}"`);
}
break;
}
}
if (sri &&
(hint.mode === 'preload' || hint.mode === 'prefetch' || hint.mode === 'modulepreload')) {
const content = await loadOutputFile(hint.url);
attrs.push(generateSriAttributes(content));
}
linkTags.push(`<link ${attrs.join(' ')}>`);
}
}
const dir = lang ? await getLanguageDirection(lang, warnings) : undefined;
const { rewriter, transformedContent } = await (0, html_rewriting_stream_1.htmlRewritingStream)(html);
const baseTagExists = html.includes('<base');
rewriter
.on('startTag', (tag) => {
switch (tag.tagName) {
case 'html':
// Adjust document locale if specified
if (isString(lang)) {
updateAttribute(tag, 'lang', lang);
}
if (dir) {
updateAttribute(tag, 'dir', dir);
}
break;
case 'head':
// Base href should be added before any link, meta tags
if (!baseTagExists && isString(baseHref)) {
rewriter.emitStartTag(tag);
rewriter.emitRaw(`<base href="${baseHref}">`);
return;
}
break;
case 'base':
// Adjust base href if specified
if (isString(baseHref)) {
updateAttribute(tag, 'href', baseHref);
}
break;
}
rewriter.emitStartTag(tag);
})
.on('endTag', (tag) => {
switch (tag.tagName) {
case 'head':
for (const linkTag of linkTags) {
rewriter.emitRaw(linkTag);
}
linkTags = [];
break;
case 'body':
// Add script tags
for (const scriptTag of scriptTags) {
rewriter.emitRaw(scriptTag);
}
scriptTags = [];
break;
}
rewriter.emitEndTag(tag);
});
const content = await transformedContent();
return {
content: linkTags.length || scriptTags.length
? // In case no body/head tags are not present (dotnet partial templates)
linkTags.join('') + scriptTags.join('') + content
: content,
warnings,
errors,
};
}
exports.augmentIndexHtml = augmentIndexHtml;
function generateSriAttributes(content) {
const algo = 'sha384';
const hash = (0, node_crypto_1.createHash)(algo).update(content, 'utf8').digest('base64');
return `integrity="${algo}-${hash}"`;
}
function updateAttribute(tag, name, value) {
const index = tag.attrs.findIndex((a) => a.name === name);
const newValue = { name, value };
if (index === -1) {
tag.attrs.push(newValue);
}
else {
tag.attrs[index] = newValue;
}
}
function isString(value) {
return typeof value === 'string';
}
async function getLanguageDirection(locale, warnings) {
const dir = await getLanguageDirectionFromLocales(locale);
if (!dir) {
warnings.push(`Locale data for '${locale}' cannot be found. 'dir' attribute will not be set for this locale.`);
}
return dir;
}
async function getLanguageDirectionFromLocales(locale) {
try {
const localeData = (await (0, load_esm_1.loadEsmModule)(`@angular/common/locales/${locale}`)).default;
const dir = localeData[localeData.length - 2];
return isString(dir) ? dir : undefined;
}
catch {
// In some cases certain locales might map to files which are named only with language id.
// Example: `en-US` -> `en`.
const [languageId] = locale.split('-', 1);
if (languageId !== locale) {
return getLanguageDirectionFromLocales(languageId);
}
}
return undefined;
}
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport { createHash } from 'node:crypto';\nimport { extname } from 'node:path';\nimport { loadEsmModule } from '../load-esm';\nimport { htmlRewritingStream } from './html-rewriting-stream';\n\nexport type LoadOutputFileFunctionType = (file: string) => Promise<string>;\n\nexport type CrossOriginValue = 'none' | 'anonymous' | 'use-credentials';\n\nexport type Entrypoint = [name: string, isModule: boolean];\n\nexport interface AugmentIndexHtmlOptions {\n  /* Input contents */\n  html: string;\n  baseHref?: string;\n  deployUrl?: string;\n  sri: boolean;\n  /** crossorigin attribute setting of elements that provide CORS support */\n  crossOrigin?: CrossOriginValue;\n  /*\n   * Files emitted by the build.\n   */\n  files: FileInfo[];\n  /*\n   * Function that loads a file used.\n   * This allows us to use different routines within the IndexHtmlWebpackPlugin and\n   * when used without this plugin.\n   */\n  loadOutputFile: LoadOutputFileFunctionType;\n  /** Used to sort the inseration of files in the HTML file */\n  entrypoints: Entrypoint[];\n  /** Used to set the document default locale */\n  lang?: string;\n  hints?: { url: string; mode: string; as?: string }[];\n}\n\nexport interface FileInfo {\n  file: string;\n  name?: string;\n  extension: string;\n}\n/*\n * Helper function used by the IndexHtmlWebpackPlugin.\n * Can also be directly used by builder, e. g. in order to generate an index.html\n * after processing several configurations in order to build different sets of\n * bundles for differential serving.\n */\nexport async function augmentIndexHtml(\n  params: AugmentIndexHtmlOptions,\n): Promise<{ content: string; warnings: string[]; errors: string[] }> {\n  const { loadOutputFile, files, entrypoints, sri, deployUrl = '', lang, baseHref, html } = params;\n\n  const warnings: string[] = [];\n  const errors: string[] = [];\n\n  let { crossOrigin = 'none' } = params;\n  if (sri && crossOrigin === 'none') {\n    crossOrigin = 'anonymous';\n  }\n\n  const stylesheets = new Set<string>();\n  const scripts = new Map</** file name */ string, /** isModule */ boolean>();\n\n  // Sort files in the order we want to insert them by entrypoint\n  for (const [entrypoint, isModule] of entrypoints) {\n    for (const { extension, file, name } of files) {\n      if (name !== entrypoint || scripts.has(file) || stylesheets.has(file)) {\n        continue;\n      }\n\n      switch (extension) {\n        case '.js':\n          // Also, non entrypoints need to be loaded as no module as they can contain problematic code.\n          scripts.set(file, isModule);\n          break;\n        case '.mjs':\n          if (!isModule) {\n            // It would be very confusing to link an `*.mjs` file in a non-module script context,\n            // so we disallow it entirely.\n            throw new Error('`.mjs` files *must* set `isModule` to `true`.');\n          }\n          scripts.set(file, true /* isModule */);\n          break;\n        case '.css':\n          stylesheets.add(file);\n          break;\n      }\n    }\n  }\n\n  let scriptTags: string[] = [];\n  for (const [src, isModule] of scripts) {\n    const attrs = [`src=\"${deployUrl}${src}\"`];\n\n    // This is also need for non entry-points as they may contain problematic code.\n    if (isModule) {\n      attrs.push('type=\"module\"');\n    } else {\n      attrs.push('defer');\n    }\n\n    if (crossOrigin !== 'none') {\n      attrs.push(`crossorigin=\"${crossOrigin}\"`);\n    }\n\n    if (sri) {\n      const content = await loadOutputFile(src);\n      attrs.push(generateSriAttributes(content));\n    }\n\n    scriptTags.push(`<script ${attrs.join(' ')}></script>`);\n  }\n\n  let linkTags: string[] = [];\n  for (const src of stylesheets) {\n    const attrs = [`rel=\"stylesheet\"`, `href=\"${deployUrl}${src}\"`];\n\n    if (crossOrigin !== 'none') {\n      attrs.push(`crossorigin=\"${crossOrigin}\"`);\n    }\n\n    if (sri) {\n      const content = await loadOutputFile(src);\n      attrs.push(generateSriAttributes(content));\n    }\n\n    linkTags.push(`<link ${attrs.join(' ')}>`);\n  }\n\n  if (params.hints?.length) {\n    for (const hint of params.hints) {\n      const attrs = [`rel=\"${hint.mode}\"`, `href=\"${deployUrl}${hint.url}\"`];\n\n      if (hint.mode !== 'modulepreload' && crossOrigin !== 'none') {\n        // Value is considered anonymous by the browser when not present or empty\n        attrs.push(crossOrigin === 'anonymous' ? 'crossorigin' : `crossorigin=\"${crossOrigin}\"`);\n      }\n\n      if (hint.mode === 'preload' || hint.mode === 'prefetch') {\n        switch (extname(hint.url)) {\n          case '.js':\n            attrs.push('as=\"script\"');\n            break;\n          case '.css':\n            attrs.push('as=\"style\"');\n            break;\n          default:\n            if (hint.as) {\n              attrs.push(`as=\"${hint.as}\"`);\n            }\n            break;\n        }\n      }\n\n      if (\n        sri &&\n        (hint.mode === 'preload' || hint.mode === 'prefetch' || hint.mode === 'modulepreload')\n      ) {\n        const content = await loadOutputFile(hint.url);\n        attrs.push(generateSriAttributes(content));\n      }\n\n      linkTags.push(`<link ${attrs.join(' ')}>`);\n    }\n  }\n\n  const dir = lang ? await getLanguageDirection(lang, warnings) : undefined;\n  const { rewriter, transformedContent } = await htmlRewritingStream(html);\n  const baseTagExists = html.includes('<base');\n\n  rewriter\n    .on('startTag', (tag) => {\n      switch (tag.tagName) {\n        case 'html':\n          // Adjust document locale if specified\n          if (isString(lang)) {\n            updateAttribute(tag, 'lang', lang);\n          }\n\n          if (dir) {\n            updateAttribute(tag, 'dir', dir);\n          }\n          break;\n        case 'head':\n          // Base href should be added before any link, meta tags\n          if (!baseTagExists && isString(baseHref)) {\n            rewriter.emitStartTag(tag);\n            rewriter.emitRaw(`<base href=\"${baseHref}\">`);\n\n            return;\n          }\n          break;\n        case 'base':\n          // Adjust base href if specified\n          if (isString(baseHref)) {\n            updateAttribute(tag, 'href', baseHref);\n          }\n          break;\n      }\n\n      rewriter.emitStartTag(tag);\n    })\n    .on('endTag', (tag) => {\n      switch (tag.tagName) {\n        case 'head':\n          for (const linkTag of linkTags) {\n            rewriter.emitRaw(linkTag);\n          }\n\n          linkTags = [];\n          break;\n        case 'body':\n          // Add script tags\n          for (const scriptTag of scriptTags) {\n            rewriter.emitRaw(scriptTag);\n          }\n\n          scriptTags = [];\n          break;\n      }\n\n      rewriter.emitEndTag(tag);\n    });\n\n  const content = await transformedContent();\n\n  return {\n    content:\n      linkTags.length || scriptTags.length\n        ? // In case no body/head tags are not present (dotnet partial templates)\n          linkTags.join('') + scriptTags.join('') + content\n        : content,\n    warnings,\n    errors,\n  };\n}\n\nfunction generateSriAttributes(content: string): string {\n  const algo = 'sha384';\n  const hash = createHash(algo).update(content, 'utf8').digest('base64');\n\n  return `integrity=\"${algo}-${hash}\"`;\n}\n\nfunction updateAttribute(\n  tag: { attrs: { name: string; value: string }[] },\n  name: string,\n  value: string,\n): void {\n  const index = tag.attrs.findIndex((a) => a.name === name);\n  const newValue = { name, value };\n\n  if (index === -1) {\n    tag.attrs.push(newValue);\n  } else {\n    tag.attrs[index] = newValue;\n  }\n}\n\nfunction isString(value: unknown): value is string {\n  return typeof value === 'string';\n}\n\nasync function getLanguageDirection(\n  locale: string,\n  warnings: string[],\n): Promise<string | undefined> {\n  const dir = await getLanguageDirectionFromLocales(locale);\n\n  if (!dir) {\n    warnings.push(\n      `Locale data for '${locale}' cannot be found. 'dir' attribute will not be set for this locale.`,\n    );\n  }\n\n  return dir;\n}\n\nasync function getLanguageDirectionFromLocales(locale: string): Promise<string | undefined> {\n  try {\n    const localeData = (\n      await loadEsmModule<typeof import('@angular/common/locales/en')>(\n        `@angular/common/locales/${locale}`,\n      )\n    ).default;\n\n    const dir = localeData[localeData.length - 2];\n\n    return isString(dir) ? dir : undefined;\n  } catch {\n    // In some cases certain locales might map to files which are named only with language id.\n    // Example: `en-US` -> `en`.\n    const [languageId] = locale.split('-', 1);\n    if (languageId !== locale) {\n      return getLanguageDirectionFromLocales(languageId);\n    }\n  }\n\n  return undefined;\n}\n"]}