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1'use strict';
2
3// If user passed `-c` or `--check` arguments to Node, check its syntax
4// instead of actually running the file.
5
6const { URL } = require('internal/url');
7const { getOptionValue } = require('internal/options');
8const {
9  prepareMainThreadExecution,
10  markBootstrapComplete,
11} = require('internal/process/pre_execution');
12
13const {
14  readStdin,
15} = require('internal/process/execution');
16
17const { pathToFileURL } = require('url');
18
19const {
20  Module: {
21    _resolveFilename: resolveCJSModuleName,
22  },
23  wrapSafe,
24} = require('internal/modules/cjs/loader');
25
26// TODO(joyeecheung): not every one of these are necessary
27prepareMainThreadExecution(true);
28
29if (process.argv[1] && process.argv[1] !== '-') {
30  // Expand process.argv[1] into a full path.
31  const path = require('path');
32  process.argv[1] = path.resolve(process.argv[1]);
33
34  // Read the source.
35  const filename = resolveCJSModuleName(process.argv[1]);
36
37  const fs = require('fs');
38  const source = fs.readFileSync(filename, 'utf-8');
39
40  markBootstrapComplete();
41
42  loadESMIfNeeded(() => checkSyntax(source, filename));
43} else {
44  markBootstrapComplete();
45
46  loadESMIfNeeded(() => readStdin((code) => {
47    checkSyntax(code, '[stdin]');
48  }));
49}
50
51function loadESMIfNeeded(cb) {
52  const { getOptionValue } = require('internal/options');
53  const hasModulePreImport = getOptionValue('--import').length > 0;
54
55  if (hasModulePreImport) {
56    const { loadESM } = require('internal/process/esm_loader');
57    loadESM(cb);
58    return;
59  }
60  cb();
61}
62
63async function checkSyntax(source, filename) {
64  let isModule = true;
65  if (filename === '[stdin]' || filename === '[eval]') {
66    isModule = getOptionValue('--input-type') === 'module' ||
67      (getOptionValue('--experimental-default-type') === 'module' && getOptionValue('--input-type') !== 'commonjs');
68  } else {
69    const { defaultResolve } = require('internal/modules/esm/resolve');
70    const { defaultGetFormat } = require('internal/modules/esm/get_format');
71    const { url } = await defaultResolve(pathToFileURL(filename).toString());
72    const format = await defaultGetFormat(new URL(url));
73    isModule = format === 'module';
74  }
75
76  if (isModule) {
77    const { ModuleWrap } = internalBinding('module_wrap');
78    new ModuleWrap(filename, undefined, source, 0, 0);
79    return;
80  }
81
82  const { loadESM } = require('internal/process/esm_loader');
83  const { handleMainPromise } = require('internal/modules/run_main');
84  handleMainPromise(loadESM((loader) => wrapSafe(filename, source)));
85}
86