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misc: prepare core/lib/legacy-javascript to be published to npm #16416

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Apr 3, 2025
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32 changes: 32 additions & 0 deletions build/build-legacy-javascript.js
Original file line number Diff line number Diff line change
@@ -0,0 +1,32 @@
/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/

import fs from 'fs';

import esbuild from 'esbuild';
import esMain from 'es-main';

import {LH_ROOT} from '../shared/root.js';

async function buildPackage() {
await esbuild.build({
entryPoints: ['core/lib/legacy-javascript/legacy-javascript.js'],
outfile: 'dist/legacy-javascript/legacy-javascript.js',
format: 'esm',
bundle: true,
});

fs.copyFileSync(`${LH_ROOT}/core/lib/legacy-javascript/package.json`,
'dist/legacy-javascript/package.json');
}

async function main() {
await buildPackage();
}

if (esMain(import.meta)) {
await main();
}
14 changes: 14 additions & 0 deletions core/lib/legacy-javascript/package.json
Original file line number Diff line number Diff line change
@@ -0,0 +1,14 @@
{
"name": "legacy-javascript",
"type": "module",
"version": "0.0.1",
"description": "Identify legacy polyfills and code transforms",
"main": "./legacy-javascript.js",
"repository": "GoogleChrome/lighthouse",
"author": "Google LLC",
"license": "Apache-2.0",
"bugs": {
"url": "https://github.com/GoogleChrome/lighthouse/issues"
},
"homepage": "https://github.com/GoogleChrome/lighthouse#readme"
}
5 changes: 3 additions & 2 deletions package.json
Original file line number Diff line number Diff line change
Expand Up @@ -16,14 +16,15 @@
"prepack": "yarn build-report --standalone --flow --esm && yarn build-types",
"postpack": "yarn clean-types",
"build-all": "npm-run-posix-or-windows build-all:task",
"build-all:task": "yarn build-report && yarn build-cdt-strings && yarn build-devtools && concurrently 'yarn build-extension' 'yarn build-lr' 'yarn build-viewer' 'yarn build-treemap' 'yarn build-smokehouse-bundle' && yarn build-pack",
"build-all:task:windows": "yarn build-report && yarn build-cdt-strings && yarn build-extension && yarn build-devtools && yarn build-lr && yarn build-viewer && yarn build-treemap && yarn build-smokehouse-bundle",
"build-all:task": "yarn build-report && yarn build-cdt-strings && yarn build-devtools && concurrently 'yarn build-extension' 'yarn build-lr' 'yarn build-viewer' 'yarn build-treemap' 'yarn build-smokehouse-bundle' 'yarn build-legacy-javascript' && yarn build-pack",
"build-all:task:windows": "yarn build-report && yarn build-cdt-strings && yarn build-extension && yarn build-devtools && yarn build-lr && yarn build-viewer && yarn build-treemap && yarn build-smokehouse-bundle && yarn build-legacy-javascript",
"build-cdt-lib": "node ./build/build-cdt-lib.js",
"build-cdt-strings": "node ./build/build-cdt-strings.js",
"build-extension": "yarn build-extension-chrome && yarn build-extension-firefox",
"build-extension-chrome": "node ./build/build-extension.js chrome",
"build-extension-firefox": "node ./build/build-extension.js firefox",
"build-devtools": "yarn reset-link && node ./build/build-bundle.js clients/devtools/devtools-entry.js dist/lighthouse-dt-bundle.js && node ./build/build-dt-report-resources.js",
"build-legacy-javascript": "node ./build/build-legacy-javascript.js",
"build-smokehouse-bundle": "node ./build/build-smokehouse-bundle.js",
"build-lr": "yarn reset-link && node --max-old-space-size=4096 ./build/build-lightrider-bundles.js",
"build-pack": "bash build/build-pack.sh",
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