Jenkins and maven-buildnumber-plugin

Question

I am using maven-buildnumber-plugin version 1.0-beta-4. This works fine on a project checked out of Subversion, but fails in Jenkins.

I assume this problem is due to Jenkins somehow removing the .svn folders.

I assumed wrong. Here is the error I got:

maven builder waiting
mavenExecutionResult exceptions not empty
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.codehaus.mojo:buildnumber-maven-plugin:1.0-beta-4:create (default) on project swift-core: Cannot get the revision information from the scm repository : 
Error!
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:217)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:319)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
    at org.jvnet.hudson.maven3.launcher.Maven3Launcher.main(Maven3Launcher.java:79)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchStandard(Launcher.java:329)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:239)
    at org.jvnet.hudson.maven3.agent.Maven3Main.launch(Maven3Main.java:146)
    at hudson.maven.Maven3Builder.call(Maven3Builder.java:124)
    at hudson.maven.Maven3Builder.call(Maven3Builder.java:71)
    at hudson.remoting.UserRequest.perform(UserRequest.java:114)
    at hudson.remoting.UserRequest.perform(UserRequest.java:48)
    at hudson.remoting.Request$2.run(Request.java:270)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:619)
Caused by: org.apache.maven.plugin.MojoExecutionException: Cannot get the revision information from the scm repository : 
Error!
    at org.codehaus.mojo.build.CreateMojo.getRevision(CreateMojo.java:673)
    at org.codehaus.mojo.build.CreateMojo.execute(CreateMojo.java:431)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
    ... 27 more
Caused by: org.apache.maven.scm.ScmException: Error!
    at org.codehaus.mojo.build.CreateMojo.checkResult(CreateMojo.java:753)
    at org.codehaus.mojo.build.CreateMojo.getRevision(CreateMojo.java:648)
    ... 30 more

I overlooked this:

Provider message:
The svn command failed.
Command output:
/bin/sh: svn: command not found

mojoFailed org.codehaus.mojo:buildnumber-maven-plugin:1.0-beta-4(default)

There is no svn client installed on the machine, that is the true source of trouble.

Solution

The error message shows that the command svn is not installed on the build machine. You can use javasvn as your providerImplementation with this configuration:

   <plugin>
    <groupId>org.codehaus.mojo</groupId>
    <artifactId>buildnumber-maven-plugin</artifactId>
    <version>1.0</version>
    <executions>
      <execution>
        <phase>validate</phase>
        <goals>
          <goal>create</goal>
        </goals>
      </execution>
    </executions>
    <configuration>
      <doCheck>true</doCheck>
      <doUpdate>true</doUpdate>
      <providerImplementations>
        <svn>javasvn</svn>
      </providerImplementations>          
    </configuration>
  </plugin>

See http://mojo.codehaus.org/buildnumber-maven-plugin/using-svnjava.html

If you need a specific version of Subversion (we're still using 1.5 here) you can pin to a specific version of svnkit too:

    <dependency>
        <groupId>org.tmatesoft.svnkit</groupId>
        <artifactId>svnkit</artifactId>
        <version>1.2.3.5521</version>
    </dependency>