firebase-admin-node/generate-esm-wrapper.js at main · Tanker187/firebase-admin-node · GitHub

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/**

* @license

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

* http://www.apache.org/licenses/LICENSE-2.0

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

const path = require('path');

const fs = require('mz/fs');

async function main() {

const entryPoints = require('./entrypoints.json');

for (const entryPoint in entryPoints) {

const info = entryPoints[entryPoint];

if (info.legacy) {

continue;

}

await generateEsmWrapper(entryPoint, info.dist);

}

async function generateEsmWrapper(entryPoint, source) {

console.log(`Generating ESM wrapper for ${entryPoint}`);

const target = getTarget(entryPoint);

const output = getEsmOutput(source, target);

await fs.mkdir(path.dirname(target), { recursive: true });

await fs.writeFile(target, output);

await fs.writeFile('./lib/esm/package.json', JSON.stringify({type: 'module'}));

}

function getTarget(entryPoint) {

const child = entryPoint.replace('firebase-admin/', '');

return `./lib/esm/${child}/index.js`;

}

function getEsmOutput(source, target) {

const sourcePath = path.resolve(source);

const cjsSource = require.resolve(sourcePath);

const keys = getExports(cjsSource);

const targetPath = path.resolve(target);

const importPath = getImportPath(targetPath, cjsSource);

let output = `import mod from ${JSON.stringify(importPath)};`;

output += '\n\n';

for (const key of keys) {

output += `export const ${key} = mod.${key};\n`;

}

return output;

}

function getImportPath(from, to) {

const fromDir = path.dirname(from);

return path.relative(fromDir, to).replace(/\\/g, '/');

}

function getExports(cjsSource) {

const mod = require(cjsSource);

const keys = new Set(Object.getOwnPropertyNames(mod));

keys.delete('__esModule');

return [...keys].sort();

}

(async () => {

try {

await main();

} catch (err) {

console.log(err);

process.exit(1);

}

})();

firebase-admin-node/generate-esm-wrapper.js at main · Tanker187/firebase-admin-node · GitHub

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