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esm: fix emit deprecation on legacy main resolve
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PR-URL: #48664
Refs: #48325
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
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@aduh95 @ruyadorno
aduh95 authored and ruyadorno committed Sep 11, 2023
1 parent 0d21b4f commit c0463b6
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Showing 2 changed files with 134 additions and 12 deletions.
25 changes: 13 additions & 12 deletions lib/internal/modules/esm/resolve.js
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Original file line number Diff line number Diff line change
Expand Up @@ -118,7 +118,7 @@ function emitInvalidSegmentDeprecation(target, request, match, pjsonUrl, interna
* @param {URL} url
* @param {URL} packageJSONUrl
* @param {string | URL | undefined} base
* @param {string} main
* @param {string} [main]
* @returns {void}
*/
function emitLegacyIndexDeprecation(url, packageJSONUrl, base, main) {
Expand All @@ -128,17 +128,7 @@ function emitLegacyIndexDeprecation(url, packageJSONUrl, base, main) {
const path = fileURLToPath(url);
const pkgPath = fileURLToPath(new URL('.', packageJSONUrl));
const basePath = fileURLToPath(base);
if (main)
process.emitWarning(
`Package ${pkgPath} has a "main" field set to ${JSONStringify(main)}, ` +
`excluding the full filename and extension to the resolved file at "${
StringPrototypeSlice(path, pkgPath.length)}", imported from ${
basePath}.\n Automatic extension resolution of the "main" field is ` +
'deprecated for ES modules.',
'DeprecationWarning',
'DEP0151',
);
else
if (!main) {
process.emitWarning(
`No "main" or "exports" field defined in the package.json for ${pkgPath
} resolving the main entry point "${
Expand All @@ -147,6 +137,17 @@ function emitLegacyIndexDeprecation(url, packageJSONUrl, base, main) {
'DeprecationWarning',
'DEP0151',
);
} else if (resolve(pkgPath, main) !== path) {
process.emitWarning(
`Package ${pkgPath} has a "main" field set to "${main}", ` +
`excluding the full filename and extension to the resolved file at "${
StringPrototypeSlice(path, pkgPath.length)}", imported from ${
basePath}.\n Automatic extension resolution of the "main" field is ` +
'deprecated for ES modules.',
'DeprecationWarning',
'DEP0151',
);
}
}

/**
Expand Down
121 changes: 121 additions & 0 deletions test/es-module/test-esm-extension-lookup-deprecation.mjs
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Original file line number Diff line number Diff line change
@@ -0,0 +1,121 @@
import { spawnPromisified } from '../common/index.mjs';
import * as tmpdir from '../common/tmpdir.js';

import assert from 'node:assert';
import { mkdir, writeFile } from 'node:fs/promises';
import * as path from 'node:path';
import { execPath } from 'node:process';
import { describe, it, before } from 'node:test';

describe('ESM in main field', { concurrency: true }, () => {
before(() => tmpdir.refresh());

it('should handle fully-specified relative path without any warning', async () => {
const cwd = path.join(tmpdir.path, Math.random().toString());
const pkgPath = path.join(cwd, './node_modules/pkg/');
await mkdir(pkgPath, { recursive: true });
await writeFile(path.join(pkgPath, './index.js'), 'console.log("Hello World!")');
await writeFile(path.join(pkgPath, './package.json'), JSON.stringify({
main: './index.js',
type: 'module',
}));
const { code, stdout, stderr } = await spawnPromisified(execPath, [
'--input-type=module',
'--eval', 'import "pkg"',
], { cwd });

assert.strictEqual(stderr, '');
assert.match(stdout, /^Hello World!\r?\n$/);
assert.strictEqual(code, 0);
});
it('should handle fully-specified absolute path without any warning', async () => {
const cwd = path.join(tmpdir.path, Math.random().toString());
const pkgPath = path.join(cwd, './node_modules/pkg/');
await mkdir(pkgPath, { recursive: true });
await writeFile(path.join(pkgPath, './index.js'), 'console.log("Hello World!")');
await writeFile(path.join(pkgPath, './package.json'), JSON.stringify({
main: path.join(pkgPath, './index.js'),
type: 'module',
}));
const { code, stdout, stderr } = await spawnPromisified(execPath, [
'--input-type=module',
'--eval', 'import "pkg"',
], { cwd });

assert.strictEqual(stderr, '');
assert.match(stdout, /^Hello World!\r?\n$/);
assert.strictEqual(code, 0);
});

it('should emit warning when "main" and "exports" are missing', async () => {
const cwd = path.join(tmpdir.path, Math.random().toString());
const pkgPath = path.join(cwd, './node_modules/pkg/');
await mkdir(pkgPath, { recursive: true });
await writeFile(path.join(pkgPath, './index.js'), 'console.log("Hello World!")');
await writeFile(path.join(pkgPath, './package.json'), JSON.stringify({
type: 'module',
}));
const { code, stdout, stderr } = await spawnPromisified(execPath, [
'--input-type=module',
'--eval', 'import "pkg"',
], { cwd });

assert.match(stderr, /\[DEP0151\]/);
assert.match(stdout, /^Hello World!\r?\n$/);
assert.strictEqual(code, 0);
});
it('should emit warning when "main" is falsy', async () => {
const cwd = path.join(tmpdir.path, Math.random().toString());
const pkgPath = path.join(cwd, './node_modules/pkg/');
await mkdir(pkgPath, { recursive: true });
await writeFile(path.join(pkgPath, './index.js'), 'console.log("Hello World!")');
await writeFile(path.join(pkgPath, './package.json'), JSON.stringify({
type: 'module',
main: '',
}));
const { code, stdout, stderr } = await spawnPromisified(execPath, [
'--input-type=module',
'--eval', 'import "pkg"',
], { cwd });

assert.match(stderr, /\[DEP0151\]/);
assert.match(stdout, /^Hello World!\r?\n$/);
assert.strictEqual(code, 0);
});
it('should emit warning when "main" is a relative path without extension', async () => {
const cwd = path.join(tmpdir.path, Math.random().toString());
const pkgPath = path.join(cwd, './node_modules/pkg/');
await mkdir(pkgPath, { recursive: true });
await writeFile(path.join(pkgPath, './index.js'), 'console.log("Hello World!")');
await writeFile(path.join(pkgPath, './package.json'), JSON.stringify({
main: 'index',
type: 'module',
}));
const { code, stdout, stderr } = await spawnPromisified(execPath, [
'--input-type=module',
'--eval', 'import "pkg"',
], { cwd });

assert.match(stderr, /\[DEP0151\]/);
assert.match(stdout, /^Hello World!\r?\n$/);
assert.strictEqual(code, 0);
});
it('should emit warning when "main" is an absolute path without extension', async () => {
const cwd = path.join(tmpdir.path, Math.random().toString());
const pkgPath = path.join(cwd, './node_modules/pkg/');
await mkdir(pkgPath, { recursive: true });
await writeFile(path.join(pkgPath, './index.js'), 'console.log("Hello World!")');
await writeFile(path.join(pkgPath, './package.json'), JSON.stringify({
main: pkgPath + 'index',
type: 'module',
}));
const { code, stdout, stderr } = await spawnPromisified(execPath, [
'--input-type=module',
'--eval', 'import "pkg"',
], { cwd });

assert.match(stderr, /\[DEP0151\]/);
assert.match(stdout, /^Hello World!\r?\n$/);
assert.strictEqual(code, 0);
});
});

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