jgit-flow maven plugin to Release Java Application

Posted byAdeel 12 Comments on jgit-flow maven plugin to Release Java Application

Introduction

As a DevOps I need a smooth way to release the java application, so I compared two maven plugin that are used to release the java application and in the end I found that Jgit-flow plugin is far better than maven-release plugin on the basis of following points:
  • Maven-release plugin creates .backup and release.properties files to your working directory which can be committed mistakenly, when they should not be. jgit-flow maven plugin doesn’t create these files or any other file in your working directory.
  • Maven-release plugin create two tags.
  • Maven-release plugin does a build in the prepare goal and a build in the perform goal causing tests to run 2 times but jgit-flow maven plugin builds project once so tests run only once.
  • If something goes wrong during the maven plugin execution, It become very tough to roll it back, on the other hand jgit-flow maven plugin makes all changes into the branch and if you want to roll back just delete that branch.
  • jgit-flow maven plugin doesn’t run site-deploy
  • jgit-flow maven plugin provides option to turn on/off maven deployment
  • jgit-flow maven plugin provides option to turn on/off remote pushes/tagging
  • jgit-flow maven plugin keeps the master branch always at latest release version.
Now let’s see how to integrate Jgit-flow maven plugin and use it

    How to use Jgit-flow maven Plugin for Release

    Follow the flowing steps 
    1. Add the following lines in your pom.xml for source code management access 
             
             
               scm:git:
               scm:git:git:
    2. Add these line to resolve the Jgit-flow maven plugin and put the other option that will be required during the build 
             

          
            
              com.atlassian.maven.plugins
              maven-jgitflow-plugin
              1.0-m4.3
              
                true
                false
                true
                true
                true
                true
                true
                true
                
                  master-test
                  deploy-test
                
               
           
        

                    

      3. Above code snippet will perform following steps:

      • Maven will resolve the jgitflow plug-in dependency
      • In the configuration section, we describe how jgit-flow plug-in will behave.
      • pushRelease XML tag to enable and disable jgit-flow from releasing the intermediate branches into the git or not.
      • keepBranch XML tag to enable and disable the plug-in for keep the intermediate branch or not.
      • noTag XMl tag to enable and disable the plug-in to create the that tag in git.
      • allowUntracked XML tag to whether allow untracked file during the checking. 
      • flowInitContext XML tag is used to override the default and branch name of the jgit-flow plug-in
      • In above code snippet, there is only two branches, master from where that code will be pulled and a intermediate branch that will be used by the jgit-flow plug-in. as I have discussed that jgit-flow plug-in uses the branches to keep it records. so development branch will be created by the plug-in that resides in the local not remotely, to track the release version etc. 
    3. To put your your releases into the repository manager add these lines 
             

        
          
          
        
        
          
          
       
    4. Put the following lines into your m2/settings.xml with your repository manager credentials 
              

        
          
              
             
             
          
       

    Start Release jgit-flow maven plugin command

    To start the new release execute jgitflow:release-start.  

    Finish Release jgit-flow maven plugin  command

    To finish new release, execute mvn jgitflow:release-finish.

    For a example I have created a repository in github.com. for testing and two branch master-test and deploy-test. It is assumed that you have configured maven and git your system.
    In the deploy-test branch run following command
    $ mvn clean -Dmaven.test.skip=true install jgitflow:release-start

    This command will take input from you for release version and create a release branch with release/. then it will push this release branch into github repository for temporarily because we are not saving the intermediate branched

    Now At the end run this command
    $ mvn -Dmaven.test.skip=true jgitflow:release-finish
    after finishing this command it will delete release/ from local and remote.

    Now you can check the changes in pom file by jgitflow. in the above snapshot, it is master-test branch, you can see in the tag it has removed the snapshot and also increased the version.  It hold the current version of the application.

    And in the deploy-test branch it show you new branch on which developers are working on

    Published by Adeel

    I am a DevOps Engineer

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    12 Comments

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    3. Inside previously mentioned program code snippet, there is certainly simply a couple of divisions, learn coming from in which in which program code will probably be taken plus a more Devops As a Service advanced part which will be employed by the particular jgit-flow plug-in. as i have got reviewed in which jgit-flow plug-in makes use of the particular divisions to help keep that data.

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    10. I have follow all the step but getting below exception….Can you please suggest.[ERROR] Caught exception in FS.readPipe()java.io.IOException: Cannot run program \”bash\” (in directory \”P:\\\”): CreateProcess error=2, The system cannot find the file specified at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048) at java.lang.Runtime.exec(Runtime.java:620) at org.eclipse.jgit.util.FS.readPipe(FS.java:431) at org.eclipse.jgit.util.FS_Win32.discoverGitPrefix(FS_Win32.java:113) at org.eclipse.jgit.util.FS.gitPrefix(FS.java:517) at org.eclipse.jgit.util.SystemReader$Default.openSystemConfig(SystemReader.java:92) at org.eclipse.jgit.internal.storage.file.FileRepository.(FileRepository.java:171) at org.eclipse.jgit.lib.BaseRepositoryBuilder.build(BaseRepositoryBuilder.java:577) at org.eclipse.jgit.api.Git.open(Git.java:113) at org.eclipse.jgit.api.Git.open(Git.java:97) at com.atlassian.jgitflow.core.JGitFlowInitCommand.getOrInitGit(JGitFlowInitCommand.java:456) at com.atlassian.jgitflow.core.JGitFlowInitCommand.call(JGitFlowInitCommand.java:112) at com.atlassian.maven.plugins.jgitflow.provider.DefaultJGitFlowProvider.gitFlow(DefaultJGitFlowProvider.java:32) at com.atlassian.maven.plugins.jgitflow.manager.AbstractFlowReleaseManager.runPreflight(AbstractFlowReleaseManager.java:67) at com.atlassian.maven.plugins.jgitflow.manager.DefaultFlowFeatureManager.getStartLabelAndRunPreflight(DefaultFlowFeatureManager.java:233) at com.atlassian.maven.plugins.jgitflow.manager.DefaultFlowFeatureManager.start(DefaultFlowFeatureManager.java:62) at com.atlassian.maven.plugins.jgitflow.mojo.FeatureStartMojo.execute(FeatureStartMojo.java:74) at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134) at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207) 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:116) at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80) at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51) at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106) at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863) at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288) at org.apache.maven.cli.MavenCli.main(MavenCli.java:199) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289) at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229) at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415) at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356) at org.codehaus.classworlds.Launcher.main(Launcher.java:47)Caused by: java.io.IOException: CreateProcess error=2, The system cannot find the file specified at java.lang.ProcessImpl.create(Native Method) at java.lang.ProcessImpl.(ProcessImpl.java:386) at java.lang.ProcessImpl.start(ProcessImpl.java:137) at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029) … 39 more

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