@buka/nestjs-config/dist/esm/src/config-loader/dotenv-loader.js

An easy to use nestjs config module

import { Logger } from '@nestjs/common';
import dotenv from 'dotenv';
import { readFile } from 'fs/promises';
import * as R from 'ramda';
import { fsExist } from '../utils/fs-exists.js';
import { parseValue } from "../utils/parse-value.js";
export function dotenvLoader(filepath, loaderOptions = {}) {
    const separator = loaderOptions.separator || '__';
    return async (moduleOptions) => {
        if (!await fsExist(filepath)) {
            if (!moduleOptions.suppressWarnings) {
                Logger.warn(`env file not found: ${filepath}`, '@buka/nestjs-config');
            }
            return {};
        }
        const content = await readFile(filepath);
        const config = dotenv.parse(content);
        let result = {};
        for (const key of Object.keys(config)) {
            const value = parseValue(config[key], loaderOptions.jsonParse);
            result = R.assocPath(key.split(separator), value, result);
        }
        return result;
    };
}