@nestjs/cli/lib/utils/get-default-tsconfig-path.js

Nest - modern, fast, powerful node.js web framework (@cli)

import * as fs from 'fs';
import { join } from 'path';
const TSCONFIG_BUILD_JSON = 'tsconfig.build.json';
const TSCONFIG_JSON = 'tsconfig.json';
export function getDefaultTsconfigPath() {
    return fs.existsSync(join(process.cwd(), TSCONFIG_BUILD_JSON))
        ? TSCONFIG_BUILD_JSON
        : TSCONFIG_JSON;
}