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GeezerVison is showing github.com — module: fix bad `require.resolve` with option paths for `.` and `..` · nodejs/node@5e2dab7

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  • lib/internal/modules/cjs
    • loader.js
  • test
    • fixtures/module-require/relative/subdir
      • relative-subdir.js
    • parallel
      • test-require-resolve-opts-paths-relative.js
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‎lib/internal/modules/cjs/loader.js‎

Copy file name to clipboardExpand all lines: lib/internal/modules/cjs/loader.js
+17-17Lines changed: 17 additions & 17 deletions
Original file line numberDiff line numberDiff line change
@@ -693,18 +693,8 @@ Module._findPath = function(request, paths, isMain) {
693693
)
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));
695695

696-
const isRelative = StringPrototypeCharCodeAt(request, 0) === CHAR_DOT &&
697-
(
698-
request.length === 1 ||
699-
StringPrototypeCharCodeAt(request, 1) === CHAR_FORWARD_SLASH ||
700-
(isWindows && StringPrototypeCharCodeAt(request, 1) === CHAR_BACKWARD_SLASH) ||
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(StringPrototypeCharCodeAt(request, 1) === CHAR_DOT && ((
702-
request.length === 2 ||
703-
StringPrototypeCharCodeAt(request, 2) === CHAR_FORWARD_SLASH) ||
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(isWindows && StringPrototypeCharCodeAt(request, 2) === CHAR_BACKWARD_SLASH)))
705-
);
706696
let insidePath = true;
707-
if (isRelative) {
697+
if (isRelative(request)) {
708698
const normalizedRequest = path.normalize(request);
709699
if (StringPrototypeStartsWith(normalizedRequest, '..')) {
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insidePath = false;
@@ -1147,12 +1137,7 @@ Module._resolveFilename = function(request, parent, isMain, options) {
11471137

11481138
if (typeof options === 'object' && options !== null) {
11491139
if (ArrayIsArray(options.paths)) {
1150-
const isRelative = StringPrototypeStartsWith(request, './') ||
1151-
StringPrototypeStartsWith(request, '../') ||
1152-
((isWindows && StringPrototypeStartsWith(request, '.\\')) ||
1153-
StringPrototypeStartsWith(request, '..\\'));
1154-
1155-
if (isRelative) {
1140+
if (isRelative(request)) {
11561141
paths = options.paths;
11571142
} else {
11581143
const fakeParent = new Module('', null);
@@ -1715,6 +1700,21 @@ function createRequire(filename) {
17151700
return createRequireFromPath(filepath);
17161701
}
17171702

1703+
/**
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* Checks if a path is relative
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* @param {string} path the target path
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* @returns {boolean} true if the path is relative, false otherwise
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*/
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function isRelative(path) {
1709+
if (StringPrototypeCharCodeAt(path, 0) !== CHAR_DOT) { return false; }
1710+
1711+
return path.length === 1 || path === '..' ||
1712+
StringPrototypeStartsWith(path, './') ||
1713+
StringPrototypeStartsWith(path, '../') ||
1714+
((isWindows && StringPrototypeStartsWith(path, '.\\')) ||
1715+
StringPrototypeStartsWith(path, '..\\'));
1716+
}
1717+
17181718
Module.createRequire = createRequire;
17191719

17201720
/**
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‎test/fixtures/module-require/relative/subdir/relative-subdir.js‎

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+1Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1 @@
1+
exports.value = 'relative subdir';
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‎test/parallel/test-require-resolve-opts-paths-relative.js‎

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+43Lines changed: 43 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,43 @@
1+
'use strict';
2+
3+
const common = require('../common');
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const assert = require('assert');
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const fixtures = require('../common/fixtures');
6+
7+
if (!common.isMainThread)
8+
common.skip('process.chdir is not available in Workers');
9+
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const subdir = fixtures.path('module-require', 'relative', 'subdir');
11+
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process.chdir(subdir);
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// Parent directory paths (`..`) work as intended
15+
{
16+
assert(require.resolve('.', { paths: ['../'] }).endsWith('index.js'));
17+
assert(require.resolve('./index.js', { paths: ['../'] }).endsWith('index.js'));
18+
19+
// paths: [".."] should resolve like paths: ["../"]
20+
assert(require.resolve('.', { paths: ['..'] }).endsWith('index.js'));
21+
assert(require.resolve('./index.js', { paths: ['..'] }).endsWith('index.js'));
22+
}
23+
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process.chdir('..');
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// Current directory paths (`.`) work as intended
27+
{
28+
assert(require.resolve('.', { paths: ['.'] }).endsWith('index.js'));
29+
assert(require.resolve('./index.js', { paths: ['./'] }).endsWith('index.js'));
30+
31+
// paths: ["."] should resolve like paths: ["../"]
32+
assert(require.resolve('.', { paths: ['.'] }).endsWith('index.js'));
33+
assert(require.resolve('./index.js', { paths: ['.'] }).endsWith('index.js'));
34+
}
35+
36+
// Sub directory paths work as intended
37+
{
38+
// assert.deepStrictEqual(fs.readdirSync('./subdir'), [5]);
39+
assert(require.resolve('./relative-subdir.js', { paths: ['./subdir'] }).endsWith('relative-subdir.js'));
40+
41+
// paths: ["subdir"] should resolve like paths: ["./subdir"]
42+
assert(require.resolve('./relative-subdir.js', { paths: ['subdir'] }).endsWith('relative-subdir.js'));
43+
}

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