title: Jenkins : What is this changelog.mustache?
body: <p>I get below exception every time I run a build on jenkins which ultimately results in build failure.
  What is this changelog.mustache file and where can I get it? Thanks.</p>
  
  <pre><code>java.lang.RuntimeException: Cannot find on classpath (changelog.mustache) or filesystem (/changelog.mustache).
      at se.bjurr.gitchangelog.api.GitChangelogApi.getTemplateContent(GitChangelogApi.java:417)
      at se.bjurr.gitchangelog.api.GitChangelogApi.render(GitChangelogApi.java:365)
      at org.jenkinsci.plugins.gitchangelog.perform.RemoteCallable.call(RemoteCallable.java:130)
      at org.jenkinsci.plugins.gitchangelog.perform.RemoteCallable.call(RemoteCallable.java:29)
      at hudson.FilePath.act(FilePath.java:1077)
      at org.jenkinsci.plugins.gitchangelog.perform.GitChangelogPerformer.performerPerform(GitChangelogPerformer.java:28)
      at org.jenkinsci.plugins.gitchangelog.GitChangelogRecorder.perform(GitChangelogRecorder.java:44)
      at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
      at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:782)
      at hudson.model.AbstractBuild$AbstractBuildExecution.performAllBuildSteps(AbstractBuild.java:723)
      at hudson.maven.MavenModuleSetBuild$MavenModuleSetBuildExecution.post2(MavenModuleSetBuild.java:1047)
      at hudson.model.AbstractBuild$AbstractBuildExecution.post(AbstractBuild.java:668)
      at hudson.model.Run.execute(Run.java:1763)
      at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:531)
      at hudson.model.ResourceController.execute(ResourceController.java:98)
      at hudson.model.Executor.run(Executor.java:410)
  Caused by: java.io.FileNotFoundException: changelog.mustache (No such file or directory)
      at java.io.FileInputStream.open(Native Method)
      at java.io.FileInputStream.&lt;init&gt;(FileInputStream.java:146)
      at com.google.common.io.Files$1.getInput(Files.java:105)
      at com.google.common.io.Files$1.getInput(Files.java:102)
      at com.google.common.io.ByteStreams.toByteArray(ByteStreams.java:249)
      at com.google.common.io.Files.toByteArray(Files.java:197)
      at com.google.common.io.Files.toString(Files.java:223)
      at se.bjurr.gitchangelog.api.GitChangelogApi.getTemplateContent(GitChangelogApi.java:414)
      ... 15 more
  </code></pre>