java-dotenv-revised

This project strongly inspired by dotenv-java which is a great tool, and is practically the only existing library that provides the ability to work with .env files conveniently.

However, there are several aspects that could be improved:

• reading of the .env files implemented via manual parsing, which could be considered as simple .properties allowing to use existing java.util.Properties instead of any manual work
• dotenv-java cannot resolve references between properties

In other words, instead of reimplementing bicycle and parsing .env file manually using regular expressions, etc., it's loaded just like the usual .properties file. In my implementation, I tried to concentrate on the functionality that, in my opinion, is exactly what is missing - resolving references.

Consider for example a file with the following content:

A=1
B=2
C=3
D=${A} ${B} ${C}

Trying to get property D will lead to value 1 2 3 be resolved.

Installation

Here you can find the instructions for installing the library using various build systems.

Gradle

1. Add Jitpack repository to your repositories list

   repositories {
       // ...other repositories you use...
       maven { url 'https://jitpack.io' }
   }

2. Add library dependency to you dependencies list

   dependencies {
       implementation 'com.github.arhor:java-dotenv-revised:0.1.5'
   }

Maven

1. Add Jitpack repository to your repositories list

   <repositories>
       <!-- ...other repositories you use... -->
       <repository>
           <id>jitpack.io</id>
           <url>https://jitpack.io</url>
       </repository>
   </repositories>

2. Add library dependency to you dependencies list

   <dependency>
       <groupId>com.github.arhor</groupId>
       <artifactId>java-dotenv-revised</artifactId>
       <version>0.1.5</version>
   </dependency>