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| Current File : //home/ubuntu/node-v16.18.1/lib/internal/modules/esm/create_dynamic_module.js |
'use strict';
const {
ArrayPrototypeJoin,
ArrayPrototypeMap,
JSONStringify,
ObjectCreate,
SafeSet,
} = primordials;
let debug = require('internal/util/debuglog').debuglog('esm', (fn) => {
debug = fn;
});
function createImport(impt, index) {
const imptPath = JSONStringify(impt);
return `import * as $import_${index} from ${imptPath};
import.meta.imports[${imptPath}] = $import_${index};`;
}
function createExport(expt) {
const name = `${expt}`;
return `let $${name};
export { $${name} as ${name} };
import.meta.exports.${name} = {
get: () => $${name},
set: (v) => $${name} = v,
};`;
}
const createDynamicModule = (imports, exports, url = '', evaluate) => {
debug('creating ESM facade for %s with exports: %j', url, exports);
const source = `
${ArrayPrototypeJoin(ArrayPrototypeMap(imports, createImport), '\n')}
${ArrayPrototypeJoin(ArrayPrototypeMap(exports, createExport), '\n')}
import.meta.done();
`;
const { ModuleWrap, callbackMap } = internalBinding('module_wrap');
const m = new ModuleWrap(`${url}`, undefined, source, 0, 0);
const readyfns = new SafeSet();
const reflect = {
exports: ObjectCreate(null),
onReady: (cb) => { readyfns.add(cb); },
};
if (imports.length)
reflect.imports = ObjectCreate(null);
callbackMap.set(m, {
initializeImportMeta: (meta, wrap) => {
meta.exports = reflect.exports;
if (reflect.imports)
meta.imports = reflect.imports;
meta.done = () => {
evaluate(reflect);
reflect.onReady = (cb) => cb(reflect);
for (const fn of readyfns) {
readyfns.delete(fn);
fn(reflect);
}
};
},
});
return {
module: m,
reflect,
};
};
module.exports = createDynamicModule;
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