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build/index.js
175
build/index.js
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import { readFileSync } from 'node:fs';
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import { resolve, dirname, relative, join, basename, extname } from 'node:path';
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/** The kind of an entrypoint in an extension manifest. */
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var ManifestEntrypointKind;
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(function (ManifestEntrypointKind) {
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/** Javascript run as part of a content script */
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ManifestEntrypointKind[ManifestEntrypointKind["CONTENT_SCRIPT_JS"] = 0] = "CONTENT_SCRIPT_JS";
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/** CSS applied as part of a content script */
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ManifestEntrypointKind[ManifestEntrypointKind["CONTENT_SCRIPT_CSS"] = 1] = "CONTENT_SCRIPT_CSS";
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/** Javascript run in the background page of an MV2 extension */
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ManifestEntrypointKind[ManifestEntrypointKind["BACKGROUND_SCRIPT"] = 2] = "BACKGROUND_SCRIPT";
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/** Javascript run the service worker of an MV3 extension */
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ManifestEntrypointKind[ManifestEntrypointKind["BACKGROUND_SERVICE_WORKER"] = 3] = "BACKGROUND_SERVICE_WORKER";
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/** Image file loaded as the extension's icon at a particular size */
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ManifestEntrypointKind[ManifestEntrypointKind["ICON"] = 4] = "ICON";
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/** Path listed in the `web_accessible_resources` of an MV2 extension */
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ManifestEntrypointKind[ManifestEntrypointKind["WEB_ACCESSIBLE_RESOURCE_V2"] = 5] = "WEB_ACCESSIBLE_RESOURCE_V2";
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/** Path listed in the `web_accessible_resources` of an MV3 extension */
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ManifestEntrypointKind[ManifestEntrypointKind["WEB_ACCESSIBLE_RESOURCE_V3"] = 6] = "WEB_ACCESSIBLE_RESOURCE_V3";
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})(ManifestEntrypointKind || (ManifestEntrypointKind = {}));
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/**
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* Gets all script entrypoints from a manifest, returning them as
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* {@link ManifestEntrypoint} objects which allow for rewriting the path of each
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* individual entrypoint in place.
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* @param manifest Parsed `manifest.json` data.
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*/
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const getScriptEntrypoints = (manifest) => {
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var _a, _b, _c;
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return [
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...((_a = manifest.content_scripts) !== null && _a !== void 0 ? _a : []).flatMap(script => {
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var _a;
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return ((_a = script.js) !== null && _a !== void 0 ? _a : []).map((path, i) => ({
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type: ManifestEntrypointKind.CONTENT_SCRIPT_JS,
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path,
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replacePath: (newPath) => script.js.splice(i, 1, newPath),
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}));
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}),
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...(manifest.manifest_version === 2
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? (((_b = manifest.background) === null || _b === void 0 ? void 0 : _b.scripts) || []).map((path, i) => ({
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type: ManifestEntrypointKind.BACKGROUND_SCRIPT,
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path,
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replacePath: (newPath) => manifest.background.scripts.splice(i, 1, newPath),
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}))
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: (((_c = manifest.background) === null || _c === void 0 ? void 0 : _c.service_worker) ? [{
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type: ManifestEntrypointKind.BACKGROUND_SERVICE_WORKER,
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path: manifest.background.service_worker,
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replacePath: (newPath) => manifest.background.service_worker = newPath,
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}] : [])),
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];
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};
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/**
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* Gets all asset entrypoints from a manifest, returning them as
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* {@link ManifestEntrypoint} objects which allow for rewriting the path of each
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* individual entrypoint in place.
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* @param manifest Parsed `manifest.json` data.
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*/
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const getAssetEntrypoints = (manifest) => {
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var _a, _b, _c;
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return [
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...((_a = manifest.content_scripts) !== null && _a !== void 0 ? _a : []).flatMap(script => {
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var _a;
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return ((_a = script.css) !== null && _a !== void 0 ? _a : []).map((path, i) => ({
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type: ManifestEntrypointKind.CONTENT_SCRIPT_CSS,
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path,
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replacePath: (newPath) => script.css.splice(i, 1, newPath),
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}));
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}),
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...Object.entries(manifest.icons || {}).map(([iconSize, path]) => ({
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type: ManifestEntrypointKind.ICON,
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path,
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replacePath: (newPath) => manifest.icons[iconSize] = newPath,
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})),
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...(manifest.manifest_version === 2
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? ((_b = manifest.web_accessible_resources) !== null && _b !== void 0 ? _b : []).map((path, i) => ({
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type: ManifestEntrypointKind.WEB_ACCESSIBLE_RESOURCE_V2,
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path,
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replacePath: (newPath) => manifest.web_accessible_resources[i] = newPath,
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}))
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: ((_c = manifest.web_accessible_resources) !== null && _c !== void 0 ? _c : []).flatMap(entry => entry.resources.map((path, i) => ({
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type: ManifestEntrypointKind.WEB_ACCESSIBLE_RESOURCE_V3,
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path,
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replacePath: (newPath) => entry.resources.splice(i, 1, newPath),
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}))))
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];
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};
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/* eslint-env node */
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function buildConfig({ manifest: manifestPathRelative, outDir, scriptPlugins = [], sourcemap, }) {
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const manifestPath = resolve(process.cwd(), manifestPathRelative);
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const manifestDirname = dirname(manifestPath);
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// Load the manifest
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let manifestContent;
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try {
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manifestContent = JSON.parse(readFileSync(manifestPath, { encoding: 'utf-8' }));
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}
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catch (error) {
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throw new Error('Failed to load manifest');
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}
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// reserve manifest.json at the root of the build output - needs to be the
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// actual manifest file we generate
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const uniqueFileNameSegmentCache = new Map([['\0', 'manifest.json']]);
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function ensureUniquePath(filepath, ext = extname(filepath).slice(1)) {
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// console.log('getting segment for', filepath);
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const cached = uniqueFileNameSegmentCache.get(filepath);
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if (cached) {
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return cached;
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}
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const idealName = join(dirname(filepath), basename(filepath, extname(filepath)));
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const buildName = (str, n) => n ? `${str}_${n}.${ext}` : `${str}.${ext}`;
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let uniquenessNum = 0;
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const existingNames = [...uniqueFileNameSegmentCache.values()];
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while (existingNames.some(existingName => existingName.toLowerCase() === buildName(idealName, uniquenessNum).toLowerCase())) {
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uniquenessNum += 1;
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}
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const finalName = buildName(idealName, uniquenessNum);
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uniqueFileNameSegmentCache.set(filepath, finalName);
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return finalName;
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}
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const scripts = getScriptEntrypoints(manifestContent);
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const assets = getAssetEntrypoints(manifestContent);
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return [
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// Process each script entrypoint independently
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...scripts.map(({ path, replacePath }) => {
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// Figure out where this bundle will live in the output
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const outPath = ensureUniquePath(path, 'js');
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// Rewrite the manifest with that path
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replacePath(outPath);
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// Build the bundle
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return {
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input: relative(process.cwd(), join(manifestDirname, path)),
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output: {
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file: join(outDir, outPath),
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format: 'iife',
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sourcemap,
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},
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plugins: scriptPlugins,
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};
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}),
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// Special step that processes the manifest and injects other assets
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{
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input: manifestPathRelative,
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output: {
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file: join(outDir, 'manifest.json'),
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},
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plugins: [
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{
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name: '_manifest-asset-processing',
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// emit other assets
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buildStart() {
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assets.forEach(({ path, replacePath }) => {
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// Figure out where the asset will live in output
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const outPath = ensureUniquePath(path);
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// Rewrite the manifest with that path
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replacePath(outPath);
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// Emit the asset as part of the build step
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this.emitFile({
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type: 'asset',
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fileName: outPath,
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source: readFileSync(join(manifestDirname, path)),
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});
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});
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},
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// hacks to make sure the manifest is emitted as bare JSON
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load: id => id === manifestPath ? 'debugger;' : null,
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renderChunk: (_, chunk) => chunk.facadeModuleId === manifestPath
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? JSON.stringify(manifestContent, null, '\t')
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: null,
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},
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],
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},
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];
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}
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export { buildConfig };
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