Including shared object in maven assembly

Question

I'm currently trying to build my project with maven and sqlite4java. Which is available in the offical maven repositories. The offical sqlite4java page on google code does have an example configuration but it's a bit outdated and does not suit my needs. I want to have a single .jar-File in the end which i can deploy elsewhere. The problem here is the shared object depedency. I am using the official build goal from their page to copy the so to the build.dir/lib but my assembly goal crashes with:

[INFO] Failed to create assembly: Error adding file-set for 'com.almworks.sqlite4java:libsqlite4java-linux-i386:so:0.282' to archive: Error adding archived file-set. PlexusIoResourceCollection not found for: /home/lhw/.m2/repository/com/almworks/sqlite4java/libsqlite4java-linux-i386/0.282/libsqlite4java-linux-i386-0.282.so
No such archiver: 'so'.

​ What am I doing wrong? Here is my current pom.xml stripped from some dependencies unrelated to this topic

<?xml version="1.0"?>
<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>de.ring0.lhw</groupId>
  <artifactId>system</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <dependencies>
    <dependency>
      <groupId>com.almworks.sqlite4java</groupId>
      <artifactId>sqlite4java</artifactId>
      <version>${sqlite4java.version}</version>
    </dependency>
    <dependency>
      <groupId>com.almworks.sqlite4java</groupId>
      <artifactId>libsqlite4java-linux-i386</artifactId>
      <version>${sqlite4java.version}</version>
      <type>so</type>
    </dependency>
  </dependencies>
  <properties>
    <sqlite4java.version>0.282</sqlite4java.version>
  </properties>
  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-dependency-plugin</artifactId>
        <executions>
          <execution>
            <id>copy</id>
            <phase>compile</phase>
            <goals>
              <goal>copy</goal>
            </goals>
            <configuration>
              <artifactItems>
                <artifactItem>
                  <groupId>com.almworks.sqlite4java</groupId>
                  <artifactId>libsqlite4java-linux-i386</artifactId>
                  <version>${sqlite4java.version}</version>
                  <type>so</type>
                  <overWrite>true</overWrite>
                  <outputDirectory>${project.build.directory}/lib</outputDirectory>
                </artifactItem>
              </artifactItems>
            </configuration>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>2.5.1</version>
        <configuration>
          <source>1.6</source>
          <target>1.6</target>
        </configuration>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-surefire-plugin</artifactId>
        <version>2.12.2</version>
        <configuration>
          <skipTests>true</skipTests>
          <systemProperties>
            <property>
              <name>sqlite4java.library.path</name>
              <value>${project.build.directory}/lib</value>
            </property>
          </systemProperties>
        </configuration>
      </plugin>
      <plugin>
        <artifactId>maven-assembly-plugin</artifactId>
        <executions>
          <execution>
            <phase>package</phase>
            <goals>
              <goal>single</goal>
            </goals>
            <configuration>
              <archive>
                <manifest>
                  <mainClass>de.ring0.lhw.Init</mainClass>
                </manifest>
              </archive>
              <descriptorRefs>
                <descriptorRef>jar-with-dependencies</descriptorRef>
              </descriptorRefs>
            </configuration>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>
</project>

Answer 1

Edit :

I think that the jar-with-dependencies assembly descriptor tries to unpack the dependencies.

See the link :

http://maven.apache.org/plugins/maven-assembly-plugin/descriptor-refs.html

maven.apache.org/plugins/maven-assembly-plugin/… ...

<unpack>true</unpack>

And of course it fails to unpack the .so

So you might have to use a custom assembly to perform what you want to do