Using envvault with Kotlin

Note: Please ensure that you have completed the previous steps

Prerequisites

JDK installed
Kotlin installed
envvault CLI tool installed
An existing Kotlin project

Usage

Running Your Application

To run your Kotlin application with environment variables from envvault:

$ envvault run --env=dev ./gradlew bootRun

Caching Environment Variables

For better performance, you can cache your environment variables:

$ envvault run --env=dev -c -- ./gradlew bootRun

Example Implementation

Here is how to set up a basic Kotlin Spring Boot application with envvault:

// Application.kt
package com.example.demo

import org.springframework.beans.factory.annotation.Value
import org.springframework.boot.autoconfigure.SpringBootApplication
import org.springframework.boot.runApplication
import org.springframework.web.bind.annotation.GetMapping
import org.springframework.web.bind.annotation.RestController

@SpringBootApplication
@RestController
class Application {
    // Your environment variables are automatically loaded
    @Value("${PORT:8080}")
    private lateinit var port: String

    @Value("${DB_URL}")
    private lateinit var dbUrl: String

    @GetMapping("/")
    fun hello(): String = "Hello from envvault!"
}

fun main(args: Array<String>) {
    runApplication<Application>(*args)
}

// application.properties
server.port=${PORT:8080}
spring.datasource.url=${DB_URL}