If I wanted to create a jar file without META-INF nonsense using jar utility I can pass the -M switch, which will:
-M do not create a manifest file for the entries
Note that this is a feature of the jar utility. If I use it, I will get a jar without the META-INF folder and included MANIFEST, basically just an archive of type jar with whatever files/directories I put in it.
How do I do this with the maven-jar-plugin? I need to do this to conform to another process. (They expect a jar with very specific file/folder layout and I cannot have a META-INF folder at the root of the jar file.)
I've got the configuration to create the jar file just right and I don't want to mess with another plugin...
You can use maven-shade-plugin to achieve the desired effect:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.4.1</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<artifactSet>
<includes>
<include>${project.groupId}:${project.artifactId}</include>
</includes>
</artifactSet>
<filters>
<filter>
<artifact>*:*</artifact>
<excludes>
<exclude>META-INF/</exclude>
</excludes>
</filter>
</filters>
</configuration>
</execution>
</executions>
</plugin>
The configuration filters out the META-INF directory and includes only the current project so that dependencies are not attached.
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