Java – Maven assembly plugin mojoexecutionexception, where dependencyset is outputdirectory

In my Khatami project, I use Maven to manage compilation and package the results into a runnable artifact: the top-level executable shell script, bin / containing executable jars and their dependent jars Please see what I mean here

For reference, this is Khatami's POM The salient part of XML:

<plugin>
        <artifactId>maven-assembly-plugin</artifactId>
        <configuration>
          <descriptors>
            <descriptor>src/main/assembly/src.xml</descriptor>
          </descriptors>
          <archive>
            <manifest>
              <mainClass>${project.groupId}.Main</mainClass>
            </manifest>
          </archive>
          <descriptorRefs>
            <descriptorRef>jar-with-dependencies</descriptorRef>
          </descriptorRefs>
        </configuration>
      </plugin>

And full Src / main / assembly / SRC xml：

<assembly>
  <id>dist</id>
  <formats>
    <format>tar.gz</format>
  </formats>
  <dependencySets>
    <dependencySet>
      <outputDirectory>bin</outputDirectory>
    </dependencySet>
  </dependencySets>
  <fileSets>
    <fileSet>
      <directory>src/main/assembly</directory>
      <outputDirectory>/</outputDirectory>
      <includes>
        <include>khatami</include>
      </includes>
      <fileMode>744</fileMode>
      <lineEnding>unix</lineEnding>
      <filtered>true</filtered>
    </fileSet>
  </fileSets>
</assembly>

And assembly attempts:

$mvn clean compile assembly:single
[INFO] Scanning for projects...
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building khatami 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-clean-plugin:2.4.1:clean (default-clean) @ khatami ---
[INFO] Deleting /home/blt/projects/com/carepilot/repos/khatami/target
[INFO] 
[INFO] --- maven-resources-plugin:2.4.3:resources (default-resources) @ khatami ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory /home/blt/projects/com/carepilot/repos/khatami/src/main/resources
[INFO] 
[INFO] --- maven-compiler-plugin:2.3.2:compile (default-compile) @ khatami ---
[INFO] Compiling 1 source file to /home/blt/projects/com/carepilot/repos/khatami/target/classes
[INFO] 
[INFO] --- maven-assembly-plugin:2.2-beta-5:single (default-cli) @ khatami ---
[INFO] Reading assembly descriptor: src/main/assembly/src.xml
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3.721s
[INFO] Finished at: Mon Jul 18 13:58:30 EDT 2011
[INFO] Final Memory: 8M/123M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-assembly-plugin:2.2-beta-5:single (default-cli) on project khatami: Failed to create assembly: Error adding file 'com.carepilot.khatami:khatami:jar:1.0-SNAPSHOT' to archive: /home/blt/projects/com/carepilot/repos/khatami/target/classes isn't a file. -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors,re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions,please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

What's wrong with me?

Solution

The error message in the relevant section is

Error adding file 'com.carepilot.khatami:khatami:jar:1.0-SNAPSHOT' to archive:
/home/blt/projects/com/carepilot/repos/khatami/target/classes isn't a file.

It expects a file and it cannot find it because the package target is not cleaned up after running

If you do MVN clean compilation and packaging: a single one will be built successfully

I will add the assembly: a single target to the package phase so that it will be built automatically

<plugin>
  <artifactId>maven-assembly-plugin</artifactId>
  <executions>
    <execution>
      <phase>package</phase>
      <goals>
        <goal>single</goal>
      </goals>
      <configuration>
        <descriptors>
          <descriptor>src/main/assembly/src.xml</descriptor>
        </descriptors>
        <archive>
          <manifest>
            <mainClass>${project.groupId}.Main</mainClass>
          </manifest>
        </archive>
        <descriptorRefs>
          <descriptorRef>jar-with-dependencies</descriptorRef>
        </descriptorRefs>
      </configuration>
    </execution>
  </executions>
</plugin>

Make the above changes to the configuration you can publish

mvn clean package

And assembly: a single target will be executed automatically

It is better to use Maven - shade - plugin instead of doing this manually