118 lines
3.4 KiB
TypeScript
118 lines
3.4 KiB
TypeScript
/* eslint-env node */
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import {readFileSync} from 'node:fs';
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import {resolve, basename, extname, dirname, relative, join} from 'node:path';
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import {getAssetEntrypoints, getScriptEntrypoints} from './entrypoints';
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import {type RollupOptions, type Plugin} from 'rollup';
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export function buildConfig ({
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manifest: manifestPathRelative,
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outDir,
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scriptPlugins = [],
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sourcemap,
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}: {
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manifest: string;
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outDir: string;
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scriptPlugins: Plugin[];
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sourcemap: boolean | 'inline' | 'hidden';
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}): RollupOptions[] {
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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: chrome.runtime.Manifest;
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try {
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manifestContent = JSON.parse(readFileSync(manifestPath, {encoding: 'utf-8'}));
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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: string, 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: string, n: number) => 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' as const,
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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) =>
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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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