Maven2: How do I generate a file that contains the names of the project's dependencies? - maven-2

Question

I would like to place the names of the dependencies in a text file that is distributed inside a package that is built with Maven.
I am planning to use the maven assembly plugin to generate the tarball package, and use filtering to put the names in the text file.
The only problem is, I don't know how to reference the dependencies in the first place.

Answer 1

You don't need to use filtering for that, use the Maven Dependency plugin and its a dependency:tree goal to display the dependency tree for this project. Set an output file with the... outputFile optional parameter. So the configuration might look like:
<project>
...
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<id>tree</id>
<phase>prepare-package</phase>
<goals>
<goal>tree</goal>
</goals>
<configuration>
<outputFile>${project.build.outputDirectory}/dep.txt</outputFile>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
...
</project>
Running the package phase would generate the dependency tree in target/classes/dep.txt and package it in the artifact. Adapt it to suit your needs.

Answer 2

You can use the maven-dependency-plugin dependency:tree to output the tree of dependencies into a file.

Answer 3

mvn dependency:resolve seems to be what you are looking for. Put following plugin configuration to your POM file:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<id>list-dependencies</id>
<phase>prepare-package</phase>
<goals>
<goal>resolve</goal>
</goals>
<configuration>
<outputFile>dependencies.txt</outputFile>
</configuration>
</execution>
</executions>
</plugin>
It will produce file dependencies.txt with content similar to:
The following files have been resolved:
am:amagent:jar:1.0:system
am:amclientsdk:jar:1.0:system
aopalliance:aopalliance:jar:1.0:compile
asm:asm:jar:2.2.3:compile
com.sun.jdmk:jmxtools:jar:1.2.1:compile
com.sun.jmx:jmxri:jar:1.2.1:compile
com.sun.xml.bind:jaxb-impl:jar:2.1.12:compile
com.sun.xml.fastinfoset:FastInfoset:jar:1.2.2:compile
com.sun.xml.messaging.saaj:saaj-impl:jar:1.3.2:compile
commons-lang:commons-lang:jar:2.3:compile
commons-logging:commons-logging:jar:1.1:compile
dom4j:dom4j:jar:1.6.1:compile
javax.activation:activation:jar:1.1:provided
javax.jms:jms:jar:1.1:compile
javax.mail:mail:jar:1.4:compile
javax.xml.bind:jaxb-api:jar:2.1:compile
javax.xml.soap:saaj-api:jar:1.3:compile
junit:junit:jar:4.4:test
log4j:log4j:jar:1.2.15:compile