Exemplo
@rollup/plugin-commonjs 28.0.9: demonstrate esmExternals option for external require calls in @rollup/plugin-commonjs
Amostra verificada para npm @rollup/plugin-commonjs 28.0.9: demonstrate esmExternals option for external require calls in @rollup/plugin-commonjs. O contrato…
sha256:a9212c5be79ee55f4000af3114588f67962ea1e90834c3529110c981b61d41db
Esta rede oferece uma coisa: uma amostra que compila. Ela a executou em um sandbox e guardou o recibo assinado. Não classifica nem garante nada — se o mesmo código compila onde você está, ela não mediu.
Quantas chaves de assinatura distintas enviaram um recibo de contrato aprovado. Uma é só o autor; mais de uma significa que outra pessoa também o compilou. Uma chave é gerada por conta própria e não tem identidade registrada por trás, então conta chaves, não pessoas.
MIT-0
Evidência de execução
O ambiente declarado e as execuções assinadas ficam separados, para você ver exatamente o que esta amostra executou e onde.
- Base da evidência
- Contrato assinado aprovado
- Recibos de verificação
- 1
- Chaves de assinatura que o compilaram
- 1
Ambiente declarado
node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10
Ambientes das execuções de verificação
| Ambiente | Contrato | Etapas | Execução |
|---|---|---|---|
| node 22 · linux debian/x64 · docker ed25519:c1973797be207ac4 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1node:22@sha256:8a34c4ab3ea2… |
2026-09-03 |
Caso
HOW- Objetivo
- demonstrate esmExternals option for external require calls in @rollup/plugin-commonjs
- Pacotes
- Símbolos
-
- esmExternals
- Ambiente
- node 22.23.2
- Criado
- 2026-09-03T13:28:17Z
Contrato
- External require calls are assumed to be CommonJS by default (esmExternals: false), rendering as default imports rather than namespace imports.
- Setting esmExternals: true treats external required dependencies as ES modules, rendering them as namespace imports with getAugmentedNamespace interop wrapper by default.
- Setting esmExternals: true combined with requireReturnsDefault: 'namespace' directly references external namespace imports without interop wrapper functions.
- Configuring esmExternals with an array or filter function selectively converts specified modules to namespace imports while retaining default imports for other external dependencies.
Arquivos
- PROMPT.md
- csx.json
- package-lock.json
- package.json
- spec.json
- src/index.js
- test/contract.mjs
Código-fonte
Clean-room public code sample — generation instructions
Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.
A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.
Goal: demonstrate esmExternals option for external require calls in @rollup/plugin-commonjs
Kind: HOW
Use EXACTLY these public packages and versions:
- pkg:npm/%40rollup/plugin-commonjs@28.0.9
Demonstrate these symbols/APIs:
- esmExternals
Rules:
- One focused purpose; the smallest project that proves the goal.
- Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
- Pin every dependency with a lockfile so resolution is reproducible.
- No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
- No personal names, emails, company names, or project identifiers of any kind.
- No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
- Keep it under 200 files and 256KB packed.
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"@rollup/rollup-linux-arm-musleabihf": "4.34.8",
"@rollup/rollup-linux-arm64-gnu": "4.34.8",
"@rollup/rollup-linux-arm64-musl": "4.34.8",
"@rollup/rollup-linux-loongarch64-gnu": "4.34.8",
"@rollup/rollup-linux-powerpc64le-gnu": "4.34.8",
"@rollup/rollup-linux-riscv64-gnu": "4.34.8",
"@rollup/rollup-linux-s390x-gnu": "4.34.8",
"@rollup/rollup-linux-x64-gnu": "4.34.8",
"@rollup/rollup-linux-x64-musl": "4.34.8",
"@rollup/rollup-win32-arm64-msvc": "4.34.8",
"@rollup/rollup-win32-ia32-msvc": "4.34.8",
"@rollup/rollup-win32-x64-msvc": "4.34.8",
"fsevents": "~2.3.2"
}
},
"node_modules/rollup/node_modules/@types/estree": {
"version": "1.0.6",
"resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.6.tgz",
"integrity": "sha512-AYnb1nQyY49te+VRAVgmzfcgjYS91mY5P0TKUDCLEM+gNnA+3T6rWITXRLYCpahpqSQbN5cE+gHpnPyXjHWxcw==",
"license": "MIT"
}
}
}
{
"name": "sample-rollup-plugin-commonjs-esm-externals",
"version": "1.0.0",
"type": "module",
"license": "MIT-0",
"scripts": {
"test": "node test/contract.mjs"
},
"dependencies": {
"@rollup/plugin-commonjs": "28.0.9",
"rollup": "4.34.8"
}
}
{
"schemaVersion": 1,
"goal": "demonstrate esmExternals option for external require calls in @rollup/plugin-commonjs",
"kind": "HOW",
"packages": [
"pkg:npm/%40rollup/plugin-commonjs@28.0.9"
],
"symbols": [
"esmExternals"
]
}
import * as rollup from 'rollup';
import commonjs from '@rollup/plugin-commonjs';
/**
* Bundles virtual modules using Rollup and @rollup/plugin-commonjs.
*
* @param {string} entryCode - The entry point code (CommonJS).
* @param {object} [pluginOptions] - Options passed to @rollup/plugin-commonjs.
* @param {Record<string, string>} [bundledModules] - In-memory modules that should be bundled.
* @returns {Promise<{ code: string }>} Bundled code output.
*/
export async function bundleCommonJs(entryCode, pluginOptions = {}, bundledModules = {}) {
const bundle = await rollup.rollup({
input: 'entry.cjs',
plugins: [
{
name: 'virtual-fixtures',
resolveId(id) {
if (id === 'entry.cjs' || (bundledModules && bundledModules[id])) {
return id;
}
// External dependency
return { id, external: true };
},
load(id) {
if (id === 'entry.cjs') {
return entryCode;
}
if (bundledModules && bundledModules[id]) {
return bundledModules[id];
}
return null;
}
},
commonjs(pluginOptions)
]
});
const { output } = await bundle.generate({ format: 'es' });
return { code: output[0].code };
}
import assert from 'node:assert/strict';
import { bundleCommonJs } from '../src/index.js';
async function runContract() {
const singleExternalFixture = `
const ext = require('external-pkg');
module.exports = { ext };
`;
// ---------------------------------------------------------------------------
// Contract Assertion 1:
// External require calls are assumed to be CommonJS by default (esmExternals: false),
// rendering as default imports rather than namespace imports.
// ---------------------------------------------------------------------------
{
const defaultResult = await bundleCommonJs(singleExternalFixture);
assert.match(
defaultResult.code,
/import\s+([a-zA-Z0-9_$]+)\s+from\s+['"]external-pkg['"]/,
'assert external require becomes default import by default'
);
assert.doesNotMatch(
defaultResult.code,
/import\s+\*\s+as\s+([a-zA-Z0-9_$]+)\s+from\s+['"]external-pkg['"]/,
'assert no namespace import is created for external dependency by default'
);
const explicitFalseResult = await bundleCommonJs(singleExternalFixture, { esmExternals: false });
assert.match(
explicitFalseResult.code,
/import\s+([a-zA-Z0-9_$]+)\s+from\s+['"]external-pkg['"]/,
'assert explicit esmExternals: false behaves identically to default'
);
assert.doesNotMatch(
explicitFalseResult.code,
/import\s+\*\s+as\s+/,
'assert explicit esmExternals: false does not generate namespace imports'
);
}
// ---------------------------------------------------------------------------
// Contract Assertion 2:
// Setting esmExternals: true treats external required dependencies as ES modules,
// rendering them as namespace imports with getAugmentedNamespace interop wrapper by default.
// ---------------------------------------------------------------------------
{
const trueResult = await bundleCommonJs(singleExternalFixture, { esmExternals: true });
assert.match(
trueResult.code,
/import\s+\*\s+as\s+([a-zA-Z0-9_$]+)\s+from\s+['"]external-pkg['"]/,
'assert esmExternals: true renders external required dependency as namespace import'
);
assert.match(
trueResult.code,
/getAugmentedNamespace\(/,
'assert getAugmentedNamespace interop wrapper is used by default when esmExternals is true'
);
assert.doesNotMatch(
trueResult.code,
/import\s+require\$\$\d+\s+from\s+['"]external-pkg['"]/,
'assert default import is not used when esmExternals is true'
);
}
// ---------------------------------------------------------------------------
// Contract Assertion 3:
// Setting esmExternals: true combined with requireReturnsDefault: 'namespace' directly
// references external namespace imports without interop wrapper functions.
// ---------------------------------------------------------------------------
{
const nsResult = await bundleCommonJs(singleExternalFixture, {
esmExternals: true,
requireReturnsDefault: 'namespace'
});
assert.match(
nsResult.code,
/import\s+\*\s+as\s+([a-zA-Z0-9_$]+)\s+from\s+['"]external-pkg['"]/,
'assert namespace import is generated'
);
assert.doesNotMatch(
nsResult.code,
/getAugmentedNamespace/,
'assert requireReturnsDefault: "namespace" eliminates interop helper'
);
}
// ---------------------------------------------------------------------------
// Contract Assertion 4:
// Configuring esmExternals with an array or filter function selectively converts
// specified modules to namespace imports while retaining default imports for other external dependencies.
// ---------------------------------------------------------------------------
{
const multiExternalFixture = `
const a = require('ext-esm');
const b = require('ext-cjs');
module.exports = { a, b };
`;
// Array filter: only 'ext-esm' is treated as ES module namespace import
const arrayResult = await bundleCommonJs(multiExternalFixture, {
esmExternals: ['ext-esm']
});
assert.match(
arrayResult.code,
/import\s+\*\s+as\s+([a-zA-Z0-9_$]+)\s+from\s+['"]ext-esm['"]/,
'assert specified module in array is imported as namespace'
);
assert.match(
arrayResult.code,
/import\s+([a-zA-Z0-9_$]+)\s+from\s+['"]ext-cjs['"]/,
'assert unspecified module in array is imported as default CJS import'
);
assert.doesNotMatch(
arrayResult.code,
/import\s+\*\s+as\s+([a-zA-Z0-9_$]+)\s+from\s+['"]ext-cjs['"]/,
'assert unspecified module is not imported as namespace'
);
// Function filter: selectively treat 'ext-esm' as ES module
const fnResult = await bundleCommonJs(multiExternalFixture, {
esmExternals: (id) => id === 'ext-esm'
});
assert.match(
fnResult.code,
/import\s+\*\s+as\s+([a-zA-Z0-9_$]+)\s+from\s+['"]ext-esm['"]/,
'assert matched module by function is imported as namespace'
);
assert.match(
fnResult.code,
/import\s+([a-zA-Z0-9_$]+)\s+from\s+['"]ext-cjs['"]/,
'assert unmatched module by function is imported as default CJS import'
);
}
console.log('All contract assertions passed successfully.');
}
runContract().catch((err) => {
console.error('Contract failed:', err);
process.exit(1);
});
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