Error while building GremlinPlugin for Neo4j Server

Question

I try to explore how neo4j could be integrated with django project and launch admin page in my django project with dependence on neo4django. But seems it requires GremlinPlugin extension in neo4j server.

Using this documentation I try to build jar file for GremlinPlugin.

But already on the first step I have error with absent license header:

alx@x1:~/Downloads/gremlin-plugin$ mvn -e clean package 
[INFO] Error stacktraces are turned on.
[INFO] Scanning for projects...
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building neo4j-gremlin-plugin 2.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-clean-plugin:2.4.1:clean (default-clean) @ neo4j-gremlin-plugin ---
[INFO] 
[INFO] --- license-maven-plugin:3:check (check-licenses) @ neo4j-gremlin-plugin ---
[INFO] Checking licenses...
[INFO] Missing header in: /home/alx/Downloads/gremlin-plugin/src/site/site.xml
[INFO] [INFO] Missing header in: /home/alx/Downloads/gremlin-plugin/src/test/java/org/neo4j/server/webadmin/rest/GremlinConsoleServiceTest.java
[INFO] Missing header in: /home/alx/Downloads/gremlin-plugin/src/test/java/org/neo4j/server/webadmin/rest/ConfigureEnabledManagementConsolesGremlinTest.java
[INFO] Missing header in: /home/alx/Downloads/gremlin-plugin/src/main/assembly/docs-assembly.xml
[INFO] Missing header in: /home/alx/Downloads/gremlin-plugin/src/main/assembly/server-plugin.xml
[INFO] Missing header in: /home/alx/Downloads/gremlin-plugin/src/main/java/org/neo4j/server/rest/repr/GremlinObjectToRepresentationConverter.java
[INFO] Missing header in: /home/alx/Downloads/gremlin-plugin/src/main/java/org/neo4j/server/rest/repr/GremlinTableRepresentation.java
[INFO] Missing header in: /home/alx/Downloads/gremlin-plugin/src/main/java/org/neo4j/server/rest/repr/GremlinMapRepresentation.java
[INFO] Missing header in: /home/alx/Downloads/gremlin-plugin/src/main/java/org/neo4j/server/plugin/gremlin/GremlinPlugin.java
[INFO] Missing header in: /home/alx/Downloads/gremlin-plugin/src/main/java/org/neo4j/server/plugin/gremlin/CountingEngineReplacementDecision.java
[INFO] Missing header in: /home/alx/Downloads/gremlin-plugin/src/main/java/org/neo4j/server/plugin/gremlin/EngineReplacementDecision.java
Missing header in: /home/alx/Downloads/gremlin-plugin/src/test/java/org/neo4j/server/plugin/gremlin/GremlinPluginTest.java
[INFO] Missing header in: /home/alx/Downloads/gremlin-plugin/src/main/java/org/neo4j/server/plugin/gremlin/ScriptCountingEngineReplacementDecision.java
[INFO] Missing header in: /home/alx/Downloads/gremlin-plugin/src/main/java/org/neo4j/server/webadmin/console/Neo4jGroovyImports.java
[INFO] Missing header in: /home/alx/Downloads/gremlin-plugin/src/main/java/org/neo4j/server/webadmin/console/GremlinSessionCreator.java
[INFO] [INFO] [INFO] Missing header in: /home/alx/Downloads/gremlin-plugin/src/test/resources/graphml.xml
[INFO] Missing header in: /home/alx/Downloads/gremlin-plugin/src/test/java/org/neo4j/server/webadmin/console/GremlinSessionTest.java
Missing header in: /home/alx/Downloads/gremlin-plugin/src/main/java/org/neo4j/server/webadmin/console/GremlinWebConsole.java
[INFO] Missing header in: /home/alx/Downloads/gremlin-plugin/src/main/java/org/neo4j/server/webadmin/console/GremlinResultHook.java
[INFO] Missing header in: /home/alx/Downloads/gremlin-plugin/src/main/java/org/neo4j/server/webadmin/console/GremlinSession.java
Missing header in: /home/alx/Downloads/gremlin-plugin/src/test/java/org/neo4j/server/plugin/gremlin/GremlinPluginFunctionalTest.java
[INFO] Missing header in: /home/alx/Downloads/gremlin-plugin/src/data/graphml1.xml
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.864s
[INFO] Finished at: Tue Jan 14 21:58:25 MSK 2014
[INFO] Final Memory: 13M/302M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.neo4j.build.plugins:license-maven-plugin:3:check (check-licenses) on project neo4j-gremlin-plugin: Some files do not have the expected license header -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.neo4j.build.plugins:license-maven-plugin:3:check (check-licenses) on project neo4j-gremlin-plugin: Some files do not have the expected license header
    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:320)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: org.apache.maven.plugin.MojoExecutionException: Some files do not have the expected license header
    at com.google.code.mojo.license.LicenseCheckMojo.execute(LicenseCheckMojo.java:64)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
    ... 19 more
[ERROR] 
[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

I use maven of version 3.0.4:

alx@x1:~/Downloads/gremlin-plugin$ mvn -v
Apache Maven 3.0.4
Maven home: /usr/share/maven
Java version: 1.7.0_25, vendor: Oracle Corporation
Java home: /usr/lib/jvm/java-7-openjdk-amd64/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "3.8.0-35-generic", arch: "amd64", family: "unix"

Does anybody has ideas what causes this problem and how can i fix it?

Answer 1

The final solution was in pulling source code of the last commit (this one at the moment of writing). Thanks to Michael Hunger for rapid response!