Maven - Depend on assembled zip

Question

I\'m trying to have a Project B pull down (and unpack) a ZIP built by Project A and deployed to a remote repository.

The ZIP is cre

Answer 1

An alternate approach could be to give up on zipping entirely, use the standard Maven lifecycle to pack your files as resources in a jar file and access them from your other projects via classpath.

Unless you have specific packing requirements (including, excluding, etc.) this would require no additional configuration: just put your stuff in your project's src/main/resources directory.

This approach has the added benefit of working unchanged when invoked from within an IDE such as Eclipse.

Answer 2

Welcome to Stack Overflow :).

You are on the right way. Your real problem is using a zip.

The following configuration is ok and work great for me. It's an old one (2 years ago), and I'm not sure that match the best practices. But I Know that's working.

This allow me to share some resources between projects, especially for unit tests.

Zip Project :

pom.xml

<groupId>com.mycompany</groupId>
<artifactId>cfg_dev</artifactId>
<version>1.1.0</version>

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-assembly-plugin</artifactId>
            <executions>
                <execution>
                    <id>cfg-main-resources</id>
                    <goals>
                        <goal>single</goal>
                    </goals>
                    <phase>package</phase>
                    <configuration>
                        <descriptors>
                            <descriptor>/src/main/assembly/resources.xml</descriptor>
                        </descriptors>
                    </configuration>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

Assembly descriptor : It will produce this artifact : cfg_dev-1.1.0-resources.zip Please, note that

1. this is a zip archive

2. the "classifier" is resources (like assembly name)

   resources zip false src/main/resources

Main Project :

pom.xml

Please, note that

1. this depends on a zip archive

2. the dependency "classifier" is resources (like previous assembly name)

   <!-- Unit test dependency -->
   <dependency>
       <groupId>com.mycompany</groupId>
       <artifactId>cfg_dev</artifactId>
       <version>${project.version}</version>
       <classifier>resources</classifier>
       <type>zip</type>
       <scope>test</scope>
   </dependency>
   
     ....
   
   <build>
     <testResources>
       <!-- Ressources habituelles  -->
       <testResource>
           <directory>src/test/resources</directory>
           <filtering>true</filtering>
       </testResource>
       <!-- Unzipped resources from cfg_dev  -->
       <testResource>
           <directory>${project.build.directory}/test-resources</directory>
           <filtering>true</filtering>
       </testResource>
   </testResources>
   
   <plugins>
   
       <!-- Unzip shared resources -->
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-dependency-plugin</artifactId>
           <executions>
               <execution>
                   <id>unpack-cfg-test-resources</id>
                   <goals>
                       <goal>unpack-dependencies</goal>
                   </goals>
                   <phase>generate-test-resources</phase>
                   <configuration>
                       <outputDirectory>${project.build.directory}/test-resources</outputDirectory>
                       <includeArtifactIds>cfg_dev</includeArtifactIds>
                       <includeGroupIds>${project.groupId}</includeGroupIds>
                       <excludeTransitive>true</excludeTransitive>
                       <excludeTypes>pom</excludeTypes>
                       <scope>test</scope>
                   </configuration>
               </execution>
           </executions>
       </plugin>
     </plugins>
   

I hope this is clear and that will help you :)

Answer 3

If you ever want to do something like this from the command line (e.g. from a script without having to write a pom.xml file), here's the way to do it...

You can either specify the individual properties:

mvn dependency:copy -DgroupId=org.apache.maven -DartifactId=maven-core -Dversion=2.2.1 -Dpackaging=zip -Dclassifier=thisistheattachedartifactsclassifier

Or specify them all in one artifact parameter:

mvn dependency:copy -Dartifact=org.apache.maven:maven-core:2.2.1:zip:thisistheattachedartifactsclassifier

With the latter, it is important to keep the classifier at the end, after the packaging/type attribute. Like this: -Dartifact=groupId:artifactId:version:type:classifier

You can also optionally specify the target directory using the -DoutputDirectory=<directory> parameter if required.