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add a real-world check for ESM<>CJS named export support (#1175)

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Fred K. Schott 2021-08-20 11:04:55 -07:00 committed by GitHub
parent 1e0e2f41cd
commit 29b7e746e6
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1 changed files with 13 additions and 3 deletions
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16
packages/astro/astro.js
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@ -14,10 +14,20 @@ const CI_INTRUCTIONS = {
};
async function main() {
// Check for ESM support by loading the "supports-esm" in an way that works in both ESM & CJS.
const supportsESM = typeof require !== 'undefined' ? require('supports-esm') : (await import('supports-esm')).default;
// Check for ESM support.
// Load the "supports-esm" package in an way that works in both ESM & CJS.
let supportsESM = typeof require !== 'undefined' ? require('supports-esm') : (await import('supports-esm')).default;
// Supported: load Astro and run. Enjoy!
// Check for CJS->ESM named export support.
// "path-to-regexp" is a real-world package that we depend on, that only
// works in later versions of Node with advanced CJS->ESM support.
// If `import {compile} from 'path-to-regexp'` will fail, we need to know.
if (supportsESM) {
const testNamedExportsModule = await import('path-to-regexp');
supportsESM = !!testNamedExportsModule.compile;
}
// Preflight check complete. Enjoy! ✨
if (supportsESM) {
return import('./dist/cli.js')
.then(({ cli }) => cli(process.argv))