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'use strict';
const { ModuleWrap } = process.binding('module_wrap');
const debug = require('util').debuglog('esm');
const ArrayJoin = Function.call.bind(Array.prototype.join);
const ArrayMap = Function.call.bind(Array.prototype.map);
const getNamespaceOfModuleWrap = (m) => {
const tmp = new ModuleWrap('import * as _ from "";_;', '');
tmp.link(async () => m);
tmp.instantiate();
return tmp.evaluate();
};
const createDynamicModule = (exports, url = '', evaluate) => {
debug(
`creating ESM facade for ${url} with exports: ${ArrayJoin(exports, ', ')}`
);
const names = ArrayMap(exports, (name) => `${name}`);
// sanitized ESM for reflection purposes
const src = `export let executor;
${ArrayJoin(ArrayMap(names, (name) => `export let $${name}`), ';\n')}
;(() => [
fn => executor = fn,
{ exports: { ${
ArrayJoin(ArrayMap(names, (name) => `${name}: {
get: () => $${name},
set: v => $${name} = v
}`), ',\n')
} } }
]);
`;
const reflectiveModule = new ModuleWrap(src, `cjs-facade:${url}`);
reflectiveModule.instantiate();
const [setExecutor, reflect] = reflectiveModule.evaluate()();
// public exposed ESM
const reexports = `import { executor,
${ArrayMap(names, (name) => `$${name}`)}
} from "";
export {
${ArrayJoin(ArrayMap(names, (name) => `$${name} as ${name}`), ', ')}
}
// add await to this later if top level await comes along
typeof executor === "function" ? executor() : void 0;`;
if (typeof evaluate === 'function') {
setExecutor(() => evaluate(reflect));
}
const runner = new ModuleWrap(reexports, `${url}`);
runner.link(async () => reflectiveModule);
runner.instantiate();
return {
module: runner,
reflect
};
};
module.exports = {
createDynamicModule,
getNamespaceOfModuleWrap,
ModuleWrap
};
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