frontend/node_modules/next/dist/esm/build/load-entrypoint.js

import fs from 'fs/promises';
import path from 'path';
import { loadBindings } from './swc';
// NOTE: this should be updated if this loader file is moved.
const PACKAGE_ROOT = path.normalize(path.join(__dirname, '../..'));
const TEMPLATE_SRC_FOLDER = path.normalize(path.join(__dirname, './templates'));
const TEMPLATES_ESM_FOLDER = path.normalize(path.join(__dirname, '../../dist/esm/build/templates'));
/**
 * Load the entrypoint file from the ESM directory and performs string
 * replacements of the template variables specified in the `replacements`
 * argument.
 *
 * For non-string replacements, the template should use the
 * `declare const ${key}: ${type}` syntax. to ensure that the type is correct
 * and the typescript can compile. You may have to use `@ts-expect-error` to
 * handle replacement values that are related to imports.
 *
 * @param entrypoint the entrypoint to load
 * @param replacements string replacements to perform
 * @param injections code injections to perform
 * @param imports optional imports to insert or set to null
 * @returns the loaded file with the replacements
 */ export async function loadEntrypoint(entrypoint, replacements, injections, imports) {
    let bindings = await loadBindings();
    const templatePath = path.resolve(path.join(TEMPLATES_ESM_FOLDER, `${entrypoint}.js`));
    let content = await fs.readFile(templatePath);
    return bindings.expandNextJsTemplate(content, // Ensure that we use unix-style path separators for the import paths
    path.join(TEMPLATE_SRC_FOLDER, `${entrypoint}.js`).replace(/\\/g, '/'), PACKAGE_ROOT.replace(/\\/g, '/'), replacements, injections ?? {}, imports ?? {});
}

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