My first IntelliJ IDEA plugin - SpringBoot Patcher

The idea of the plugin was inspired by IntelliJ behaviour when it is running unit tests: if maven module defines some specific settings for maven-surefire plugin IntelliJ picks up those settings, resolves them and transforms to command line arguments, for example following configuration of maven-surefire plugin:

...
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>${surefire.version}</version>
<configuration>
    <systemPropertyVariables>
        <spring.datasource.url>jdbc:h2:mem:testdb</spring.datasource.url>
        <spring.datasource.driverClassName>spring.datasource.driverClassName</spring.datasource.driverClassName>
        <spring.datasource.username>sa</spring.datasource.username>
        <spring.datasource.password>password</spring.datasource.password>
    </systemPropertyVariables>
</configuration>
...

causes IntelliJ to run individual tests with -Dspring.datasource.url=jdbc:h2:mem:testdb ... system properties.

This actually means any developer may setup his own environment(s), define its parameters via maven profile and effectively switch between environments via choosing target maven profile when running individual unit or integration tests.

Unfortunately, IntelliJ IDEA lacks the similar functionality for SpringBoot applications and the purpose of SpringBoot Patcher plugin is to fill in this gap, the behaviour of this plugin is following: when IntelliJ runs main class, plugin tries to discover execution configuration of spring-boot-maven-plugin with the goal=run and same mainClass and in case of success it enriches command line arguments with discovered system properties, for example, following configuration:

...
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<executions>
    <execution>
        <id>run-app</id>
        <goals>
            <goal>run</goal>
        </goals>
        <phase>none</phase>
        <configuration>
            <mainClass>com.tld.MainClass</mainClass>
            <systemPropertyVariables>
                <spring.datasource.url>jdbc:h2:mem:testdb</spring.datasource.url>
                <spring.datasource.driverClassName>spring.datasource.driverClassName</spring.datasource.driverClassName>
                <spring.datasource.username>sa</spring.datasource.username>
                <spring.datasource.password>password</spring.datasource.password>
            </systemPropertyVariables>
        </configuration>
    </execution>
</executions>
...

causes IntelliJ IDEA to run com.tld.MainClass with -Dspring.datasource.url=jdbc:h2:mem:testdb ... system properties.