ENV file parser for Typescript type definitions

Installation:

$ npm i @golostos/env-to-js

Usage:

Usage: env-to-ts [OPTIONS]...

Options:
  -v, --version           output the version number
  -e, --envfile <value>   Envfile name (default: ".env")
  -t, --types <value>     Name of a file with TS types for environment variables
  -d, --declare <value>   Name of a file with global env type declarations (default:
                          "environment.d.ts")
  -w, --watch             Watch mode (default: false)
  -ni, --no-infer-number  No infer number type from the env variable
  -ne, --no-node-env      This prevents of using NODE_ENV variable in the types definitions
  -nd, --no-declare-file  This prevents the creation of a file with global env type declarations        
  -h, --help              display help for command

Input file example (.env):

# POSTGRES
POSTGRES_USER=prisma
POSTGRES_PASSWORD=topsecret
POSTGRES_DB=vdc
DB_HOST=localhost
DB_PORT=5432
DB_SCHEMA=public

# Prisma database connection
DATABASE_URL=postgresql://${POSTGRES_USER}:${POSTGRES_PASSWORD}@${DB_HOST}:${DB_PORT}/${POSTGRES_DB}?schema=${DB_SCHEMA}&sslmode=prefer

Example of the command:

$ npx env-to-ts -e test/.env -t test/EnvironmentVariables.ts -w

Output file example (EnvironmentVariables.ts):

export interface EnvironmentVariables {
  POSTGRES_USER: string;
  POSTGRES_PASSWORD: string;
  POSTGRES_DB: string;
  DB_HOST: string;
  DB_PORT: number;
  DB_SCHEMA: string;
  DATABASE_URL: string;
  NODE_ENV: "production" | "development" | "testing";
}

Output file example (environment.d.ts):

/* eslint-disable prettier/prettier */
declare module 'process' {
  global {
    namespace NodeJS {
      interface ProcessEnv {
        POSTGRES_USER: string;
        POSTGRES_PASSWORD: string;
        POSTGRES_DB: string;
        DB_HOST: string;
        DB_PORT: number;
        DB_SCHEMA: string;
        DATABASE_URL: string;
        NODE_ENV: 'production' | 'development' | 'testing';
      }
    }
  }
}