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SBT-Delegate-Maven-Plugin

A Maven plugin that caches & executes SBT. It is helpful when:

  • Your work's CI only supports Maven.
  • You'd like to use a SBT plugin or feature not supported in Maven, and vice versa.
  • You'd like to use Scala.js or build for multiple platforms while keeping a Maven build definition.

Similar Plugins

<build>
  <plugins>
    <plugin>
      <groupId>com.augustnagro</groupId>
      <artifactId>sbt-delegate-maven-plugin</artifactId>
      <version>0.1.0</version>
    </plugin>
  </plugins>
</build>

Usage

This plugin is extremely simple. It extracts the included SBT zip file to a temporary directory, and then runs SBT using the Maven configuration. Future runs re-use the extracted SBT.

First, create a regular SBT project with a build.sbt file. For example, with sbt new scala/scala3.g8.

Next, create a pom.xml file with the plugin:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>org.example</groupId>
  <artifactId>test-project</artifactId>
  <version>0.1.0-SNAPSHOT</version>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
  </properties>

  <build>
    <plugins>
      <plugin>
        <groupId>com.augustnagro</groupId>
        <artifactId>sbt-delegate-maven-plugin</artifactId>
        <version>0.1.0</version>
        <executions>
          <execution>
            <phase>package</phase>
            <goals>
              <goal>sbt</goal>
            </goals>
            <configuration>
              <jvmParams>
                <param>-DsomeJavaProperty=true</param>
              </jvmParams>
              <sbtParams>
                <param>clean</param>
                <param>test</param>
                <param>package</param>
              </sbtParams>
            </configuration>
          </execution>
        </executions>
      </plugin>

      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.8.1</version>
        <configuration>
          <source>1.8</source>
          <target>1.8</target>
          <skipMain>true</skipMain>
          <skip>true</skip>
        </configuration>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-install-plugin</artifactId>
        <version>2.5.2</version>
        <configuration>
          <skip>true</skip>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

There is only one goal, sbt, and two configuration parameters available. jvmParams is an array of parameters for the JVM running SBT, and sbtParams are the parameters passed to SBT itself.

You can bind the sbt goal to any phases you like, although only one is recommended for performance. Here we bind to Maven's package phase.

Finally, notice that we skip execution of the built-in Maven compile and install plugins, since we're doing everything here with SBT.

Version Table

If there's a newer version of SBT available, please file a gihub issue and I'll cut a new release.

Sbt-Delegate-Maven-Plugin version SBT version
0.1.0 1.5.3

License

Apache 2.0

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A Maven plugin that runs SBT

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