Mirror: Rollup plugin to automatically check the exports of a library for cjs-module-lexer compatibility.
kitten.sh
1import { parse, init } from 'cjs-module-lexer';
2import { createFilter } from '@rollup/pluginutils';
3
4function cjsCheck(opts = {}) {
5 const filter = createFilter(opts.include, opts.exclude, {
6 resolve: false
7 });
8
9 return {
10 name: "cjs-check",
11
12 async renderChunk(code, chunk) {
13 if (opts.extension !== '.js') {
14 return null;
15 } else if (!filter(chunk.fileName)) {
16 return null;
17 }
18
19 await init()
20 const output = parse(code);
21 const missingReexports = [];
22 const missingExports = [];
23
24 let hasMissing = false;
25 for (const mod of chunk.exports) {
26 if (mod[0] == '*' && !output.reexports.includes(mod.slice(1))) {
27 hasMissing = true;
28 missingReexports.push(mod.slice(1));
29 } else if (mod[0] != '*' && !output.exports.includes(mod)) {
30 hasMissing = true;
31 missingExports.push(mod);
32 }
33 }
34
35 if (hasMissing) {
36 let message = '';
37 if (missingReexports.length) {
38 message += 'The following re-exports are undetected:\n';
39 message += missingReexports.map(x => `- ${x}\n`).join('');
40 }
41
42 if (missingExports.length) {
43 message += 'The following exports are undetected:\n';
44 message += missingExports.map(x => `- ${x}\n`).join('');
45 }
46
47 if (missingExports.length + missingReexports.length >= chunk.exports.length) {
48 message = 'All chunk exports have not been detected. Is the chunk a CommonJS module?'
49 }
50
51 throw new Error(
52 `cjs-module-lexer did not agree with Rollup\'s exports for ${chunk.fileName}.\n${message}`
53 );
54 }
55
56 return null;
57 }
58 };
59}
60
61export default cjsCheck;