import esbuild from 'esbuild';

import {existsSync, mkdirSync, readFileSync, writeFileSync} from 'node:fs';

import {join} from 'node:path';

export const PACKAGE_JSON = 'package.json';

const readPackageJson = () => {

const packageJson = join(process.cwd(), PACKAGE_JSON);

const json = readFileSync(packageJson, 'utf8');

const {peerDependencies, devDependencies} = JSON.parse(json);

return {

peerDependencies: peerDependencies ?? {},

devDependencies: devDependencies ?? devDependencies

};

};

const {peerDependencies, devDependencies} = readPackageJson();

export const externalDependencies = [

...Object.keys(peerDependencies),

...Object.keys(devDependencies)

];

const dist = join(process.cwd(), 'dist');

if (!existsSync(dist)) {

mkdirSync(dist);

}

const script = await esbuild.build({

entryPoints: ['src/index.ts'],

outfile: 'dist/index.mjs',

bundle: true,

minify: true,

format: 'esm',

platform: 'node',

write: false,

banner: {

js: "import { createRequire as topLevelCreateRequire } from 'module';\n const require = topLevelCreateRequire(import.meta.url);"

},

external: externalDependencies

});

writeFileSync('dist/index.js', `#!/usr/bin/env node\n${script.outputFiles[0].text}`);