1 | 'use strict';
|
2 | const getDocumentationUrl = require('./utils/get-documentation-url');
|
3 | const methodSelector = require('./utils/method-selector');
|
4 |
|
5 | const message = 'Only use `process.exit()` in CLI apps. Throw an error instead.';
|
6 | const importWorkerThreadsSelector = [
|
7 |
|
8 | [
|
9 | 'CallExpression',
|
10 | '[callee.type="Identifier"]',
|
11 | '[callee.name="require"]',
|
12 | '[arguments.length=1]',
|
13 | '[arguments.0.type="Literal"]',
|
14 | '[arguments.0.value="worker_threads"]'
|
15 | ].join(''),
|
16 |
|
17 | [
|
18 | 'ImportDeclaration',
|
19 | '[source.type="Literal"]',
|
20 | '[source.value="worker_threads"]'
|
21 | ].join('')
|
22 | ].join(', ');
|
23 | const processOnOrOnceCallSelector = methodSelector({
|
24 | object: 'process',
|
25 | names: ['on', 'once'],
|
26 | min: 1
|
27 | });
|
28 | const processExitCallSelector = methodSelector({
|
29 | object: 'process',
|
30 | name: 'exit'
|
31 | });
|
32 |
|
33 | const create = context => {
|
34 | const startsWithHashBang = context.getSourceCode().lines[0].indexOf('#!') === 0;
|
35 |
|
36 | if (startsWithHashBang) {
|
37 | return {};
|
38 | }
|
39 |
|
40 | let processEventHandler;
|
41 |
|
42 |
|
43 | let requiredWorkerThreadsModule = false;
|
44 | const problemNodes = [];
|
45 |
|
46 | return {
|
47 |
|
48 | [importWorkerThreadsSelector]: () => {
|
49 | requiredWorkerThreadsModule = true;
|
50 | },
|
51 |
|
52 | [processOnOrOnceCallSelector]: node => {
|
53 | processEventHandler = node;
|
54 | },
|
55 |
|
56 | [processExitCallSelector]: node => {
|
57 | if (!processEventHandler) {
|
58 | problemNodes.push(node);
|
59 | }
|
60 | },
|
61 | 'CallExpression:exit': node => {
|
62 | if (node === processEventHandler) {
|
63 | processEventHandler = undefined;
|
64 | }
|
65 | },
|
66 | 'Program:exit': () => {
|
67 | if (!requiredWorkerThreadsModule) {
|
68 | for (const node of problemNodes) {
|
69 | context.report({
|
70 | node,
|
71 | message
|
72 | });
|
73 | }
|
74 | }
|
75 | }
|
76 | };
|
77 | };
|
78 |
|
79 | module.exports = {
|
80 | create,
|
81 | meta: {
|
82 | type: 'suggestion',
|
83 | docs: {
|
84 | url: getDocumentationUrl(__filename)
|
85 | }
|
86 | }
|
87 | };
|