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Type: Bug
Resolution: Fixed
Priority: Major
Component/s: android-emulator-plugin
Labels:
None
Environment:
Jenkins 1.436, android-emulator-plugin 1.18, Ubuntu 10.04 master, ubuntu 11.04 or windows 7 slave.
Using maven-release-plugin with javasvn provider.

Similar Issues:

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Use of maven-release-plugin with the android-emulator-plugin fails because the logcat temporary log file is captured as a modified file in the maven workspace.

mavenExecutionResult exceptions not empty
message : Failed to execute goal org.apache.maven.plugins:maven-release-plugin:2.2.1:prepare (default-cli) on project parent: Cannot prepare the release because you have local modifications : 
[C:\jenkins\slave\workspace\testjob\logcat_5637825123254995961.log:unknown]

cause : Cannot prepare the release because you have local modifications : 
[C:\jenkins\slave\workspace\testjob\logcat_5637825123254995961.log:unknown]

Stack trace : 
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-release-plugin:2.2.1:prepare (default-cli) on project parent: Cannot prepare the release because you have local modifications : 
[C:\jenkins\slave\workspace\testjob\logcat_5637825123254995961.log:unknown]

	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:213)
	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(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	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:158)
	at hudson.maven.Maven3Builder.call(Maven3Builder.java:112)
	at hudson.maven.Maven3Builder.call(Maven3Builder.java:70)
	at hudson.remoting.UserRequest.perform(UserRequest.java:118)
	at hudson.remoting.UserRequest.perform(UserRequest.java:48)
	at hudson.remoting.Request$2.run(Request.java:287)
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
	at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)
Caused by: org.apache.maven.plugin.MojoFailureException: Cannot prepare the release because you have local modifications : 
[C:\jenkins\slave\workspace\testjob\logcat_5637825123254995961.log:unknown]

	at org.apache.maven.plugins.release.PrepareReleaseMojo.prepareRelease(PrepareReleaseMojo.java:310)
	at org.apache.maven.plugins.release.PrepareReleaseMojo.execute(PrepareReleaseMojo.java:258)
	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.shared.release.ReleaseFailureException: Cannot prepare the release because you have local modifications : 
[C:\jenkins\slave\workspace\testjob\logcat_5637825123254995961.log:unknown]

	at org.apache.maven.shared.release.phase.ScmCheckModificationsPhase.execute(ScmCheckModificationsPhase.java:153)
	at org.apache.maven.shared.release.DefaultReleaseManager.prepare(DefaultReleaseManager.java:206)
	at org.apache.maven.shared.release.DefaultReleaseManager.prepare(DefaultReleaseManager.java:142)
	at org.apache.maven.shared.release.DefaultReleaseManager.prepare(DefaultReleaseManager.java:104)
	at org.apache.maven.plugins.release.PrepareReleaseMojo.prepareRelease(PrepareReleaseMojo.java:302)
	... 30 more

I cannot easily work around this by adding a checkModificationExcludes entry into the release:prepare parameters because it does not take a wildcard filename (needed to match the logcat_*.log temporary filename).

I have managed to workaround this by building a local copy of the plugin that uses a file suffix of .log~ (maven ignores that because it treats is as a backup file). Example patch snippet to do this below.

-        final FilePath logcatFile = build.getWorkspace().createTempFile("logcat_", ".log");
+        final FilePath logcatFile = build.getWorkspace().createTempFile("logcat_", ".log~");

That is not a proper solution but it does work.

I guess that the proper solution will involve generating a temporary file outside of the workspace somewhere on the build slave.

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