pom.xml

<?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>com.pi4j</groupId>
    <artifactId>pi4j-example-fatjar</artifactId>
    <name>Pi4J :: MINIMAL EXAMPLE :: Sample "fat jar" project</name>
    <description>Pi4J Sample Code</description>
    <version>0.0.1</version>

    <!-- BUILD PROPERTIES -->
    <properties>
        <!-- PROJECT ENCODING PROPERTIES -->
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <main.class>com.pi4j.example.MinimalExample</main.class>

        <!-- JAVA COMPILER VERSIONS -->
        <java.version>11</java.version>
        <maven.compiler.source>${java.version}</maven.compiler.source>
        <maven.compiler.target>${java.version}</maven.compiler.target>

        <!-- DEPENDENCIES VERSIONS -->
        <slf4j.version>2.0.12</slf4j.version>
        <pi4j.version>2.5.1</pi4j.version>

        <!-- BUILD PLUGIN VERSIONS -->
        <maven-compiler-plugin.version>3.8.1</maven-compiler-plugin.version>
        <maven-jar-plugin.version>3.1.0</maven-jar-plugin.version>
        <maven-shade-plugin.version>3.2.4</maven-shade-plugin.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${slf4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-simple</artifactId>
            <version>${slf4j.version}</version>
        </dependency>

        <!-- include Pi4J Core -->
        <dependency>
            <groupId>com.pi4j</groupId>
            <artifactId>pi4j-core</artifactId>
            <version>${pi4j.version}</version>
        </dependency>

        <!-- include Pi4J Plugins (Platforms and I/O Providers) -->
        <dependency>
            <groupId>com.pi4j</groupId>
            <artifactId>pi4j-plugin-raspberrypi</artifactId>
            <version>${pi4j.version}</version>
        </dependency>
        <dependency>
            <groupId>com.pi4j</groupId>
            <artifactId>pi4j-plugin-gpiod</artifactId>
            <version>${pi4j.version}</version>
        </dependency>
    </dependencies>

    <build>
        <finalName>pi4j-example-fatjar</finalName>

        <plugins>
            <!--
            https://maven.apache.org/plugins/maven-compiler-plugin/
            The Compiler Plugin is used to compile the sources of your project.
            -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>${maven-compiler-plugin.version}</version>
                <configuration>
                    <release>${java.version}</release>
                    <showDeprecation>true</showDeprecation>
                    <showWarnings>true</showWarnings>
                    <verbose>false</verbose>
                </configuration>
            </plugin>

            <!--
            https://maven.apache.org/plugins/maven-jar-plugin/
            This plugin provides the capability to build (executable) jars and is used here to set the mainClass
            which will start the application.
            -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <version>${maven-jar-plugin.version}</version>
                <configuration>
                    <archive>
                        <manifest>
                            <mainClass>${main.class}</mainClass>
                        </manifest>
                    </archive>
                </configuration>
            </plugin>

            <!--
            https://maven.apache.org/plugins/maven-shade-plugin/
            This plugin provides the capability to package the artifact in an uber-jar, including its dependencies and
            to shade - i.e. rename - the packages of some of the dependencies. The transformer will combine the files
            in the META-INF.services directories of multiple Pi4J plugins with the same package name into one file.
            -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>${maven-shade-plugin.version}</version>
                <configuration>
                    <transformers>
                        <transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
                    </transformers>
                </configuration>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>