I need to build a Java project on Maven. I am working on a multi-module Maven project that's built on the Jenkins Pipeline in the Nexus repository. I have a few libraries that are not available on the Nexus repository. I can't manually upload the libraries. I am building this project on a pipeline.
What I did:
I created a folder named jars in the project root of the Git hub repository and manually put all the jar files that are not available on Nexus. In the dependency, I referenced all these local jars as in the dependency parameters.
In the repositories, I gave the URL of the git hub repo of the jar folder. The Jenkins were not able to pick the libraries. I am getting the following error: dependency: dependency version - Build Error - Could not build for non-released dependencies and I am getting an error for all the jars that are in the jars folder. I tried putting the jars folder in src/main/resources but still getting the same error.
How can I reference this jar folder so that the Jenkins Pipeline can take it? I don't have control over the Jenkins / Scripts that are involved. I am a developer just building it on the Pipeline.
P.S: I don't have access to the internet at my company to post the POM or Build Failure errors.
Adding more details:
It's built on the Pipeline. There are two repositories: Nexus 2 and Nexus 3. The particular libraries are not available on Nexus 3 and pipeline takes the build only on Nexus 3.
We have raised a request to upload those libraries but it's not going to happen anytime soon. The Jenkins Pipelines takes it's files from the Github repository and builds the Java project using Maven. I don't have control to a pipeline or any of the scripts in Jenkins.
We downloaded all the libraries that are not available and put that in a folder in git hub. There are 4 cycles in the Pipeline. Github Cycle / Jenkins Cycle / Deployment Cycle / Release Cycle.
Github Cycle: In this cycle, it follows three stages. It takes the code from the code, builds it. It builds the snapshot and uploads it to Nexus repo. In these 2 stages, it was able to successfully build by taking the code from the GitHub and builds it and artifact generated. Third stage: It's really strange as in this stage, it again builds and build getting failed in this stage citing code for Non Released Dependencies for the jars that are uploaded in the git hub.
What might be the reason for this: When it can build in the first two stages of the Github cycle and getting failed in the third stage for Build Failure for non-released dependencies.
The pipeline is designed in such a way that it looks only on Nexus 3 and build during each phase of the cycle.
In the repositories, I gave the URL of the git hub repo of the jar
folder
That does not work because your lib folder is not a valid Maven repository.
How can I reference this jar folder so that the Jenkins Pipeline can
take it?
You have some options:
Set up custom Maven repository manager. You can use Nexus
Repository Manager or JFrog Artifactory or something else.
It will give you the greatest flexibility and allow to do a lot more
in the future. Downside is, you will need to have the infrastructure
to run this which usually comes with some sort of maintenance cost.
Install the bundles in Maven's local repo from the jar folder you already have. There are two ways you can do that:
Via script in Jenkins Pipeline that runs before your build and calls mvn install-file ... for each library in your jar folder. You can find the exact syntax for this command on Apache Maven Install Plugin site
By changing your build and calling the install-file goal of the maven-install-plugin in earlier build phase. I've personally
never done that but this answer suggests it's possible.
remove the files from the jar folder and create a wrapper project for each of them which does nothing but install the jar in
the local maven repository. Make sure those are the first modules to
run in your multi-module project.
Related
Are there any plugins or ways to download the dependencies for a maven project from Jenkins? I am using Jenkins for a multi-module desktop application. Although I know I could just archive all dependencies, I don't see why there isn't the ability to download dependencies using maven which installed on the same machine as Jenkins. Preferably one would specify the location of a pom and then have the ability with one click to download all the dependencies for that pom. Can you do this? I do not need or want an entire binary repository for this feature.
Edit: I will try and rephrase this as I don't think people are understanding.
In Jenkins one has the ability to archive artifacts at the end of a build. Also in jenkins you have integration with maven. When building a jar in maven you have arguablly 2 options:
You can either use the assembly plugin which zips all .class files
together with those produced from your source code resulting in 1 jar
You can create a jar just source code which references all
dependency jars which are located in a separate folder.
In Jenkins one also has the ability to download the latest artifact. Now if I am using Option 2, I can either archieve just the jar which my sources produced, which I would say is more desirable for space and is the whole purpose of the archive functionality, or you can also archive the libraries too.
Here is the PROBLEM!! If I don't archive the libraries then I cannot easily run this jar, as it is a desktop application and its dependencies cannot be obtained in the same mannor as clicking on a link from jenkins. So lets say my question is what is the easiest way to obtain them? Extra info: assume jenkins is running as a server and you can't use artifactory or another server application, that seems to me to be massive over kill.
Use the maven plugin and create a maven job for your project. Jenkins will then use the maven command you provide in the job configuration to build the project. This means maven will download the projects dependencies and store them on the machine jenkins is running. Normally this would be <JENKINS_HOME>/.m2/repository. This way you get a local repository that only contains the dependencies of the projects you created maven jobs for.
I am lacking some basic understanding of using a repository manager for our projects. What I don't know is how, if I use a repository manager, if I run a local install command Maven doesn't deploy the package to something like a shared Nexus instance. I seem to have some confusion between local repositories and shared ones when using a repository manager.
Apologies for the naivity and for not testing this myself. We have started versioning our application and using a shared file system approach to getting artifacts and are left with a few questions about what, within the scope of what we are currently doing, will be gained by using a repository manager instead. We do use TeamCity as a build server which is deploying to that currently used file system. I need to know some answers to a few questions before POCing a repo manager.
install is specific to the local repository.
From Maven's point of view whether a remote repository is hosted by your repository manager or is completely external has no relevance - when you're adding your artifact to any kind of remote repository, you need to use the deploy plugin (or release for non-trivial deployments).
Repository managers usually generate instructions on configuring your projects for deployment to a hosted repo.
maven defines a lifecycle (clean, compile, install, deploy...). There are default mappings when you execute "mvn install". So maven knows which plugins to execute for that maven goal.
The Introduction page gives a good overview what happens for each phase (goal) and what the default plugins are: https://maven.apache.org/guides/introduction/introduction-to-the-lifecycle.html
In your case: mvn install will copy the artifacts into the local maven repository to be shared by other projects you have locally.
If you want to share artifacts with other developers on other locations "mvn deploy" will copy the artifacts to the remote repository. Note you need to configure the distributionManagement section in the pom.xml to be able to do that.
The normal maven setup should look like this:
project -> local repository -> private remote repository -> public remote repository
Project: in the simplest case your project consists of source files and a configuration file (pom.xml). The project may depend on third party libraries like junit. The jar files of the libraries are not stored in your project directory, only the information which jars are needed.
mvn package
This command creates a jar out of your project an places it in the target/ folder of your project.
Local Repository: This is a maven repository stored locally on your machine. It normally resides in ~/.m2/repository/. Every dependency you are using in your project will be stored in this repository. On compiling your project, maven will use the jar files from this location.
mvn install
This command creates a jar file and copies it to your local repository: ~/.m2/repository/groupId/artifactId/version/project.jar. Now you can use this jar in different independent projects as a dependency, but only your machine.
Private Remote Repository: Most of the time this is a Nexus in your company network. This server allows to share the build project across developers. Your TeamCity server builds the jar and copies it to your nexus server. Beyond this the nexus server works like a proxy, e.g. A Developer needs junit-4.1.1.jar, so the server looks for it on public remote repositories and caches it.
mvn deploy
This command builds a jar and sends it to your nexus server ('to your private remote repository') After that every developer inside your company network can access the jar.
Public Remote Repository: These are repositories available on the internet which contain several jar files, e.g. maven.codehaus.org
Summary:
If you call mvn compile maven looks for the dependencies in your local repository. If maven can't find them, it will ask the (private/public) remote repository, and copy the files to the local repository.
You should not synchronize a local repository over network, since this type of repository is not targeted at such use and may break in some obscure way.
What you need is a mvn deploy - copies the final package to the remote repository for sharing with other developers and projects
mvn install you tried will just build and install the project in your local ~/.m2 repository. It will_not publish the artifacts to your nexus repository which you have configured.
Both install and deploy are valid build phase - meaning it executes all previous phases. Please refer to Maven docs below for more understanding.
From maven documentation:
the default Maven lifecycle has the following build phases (for a complete list of the build phases, refer to the Lifecycle Reference):
validate - validate the project is correct and all necessary information is available
compile - compile the source code of the project
test - test the compiled source code using a suitable unit testing framework. These tests should not require the code be packaged or deployed
package - take the compiled code and package it in its distributable format, such as a JAR.
integration-test - process and deploy the package if necessary into an environment where integration tests can be run
verify - run any checks to verify the package is valid and meets quality criteria
**install** - install the package into the local repository, for use as a dependency in other projects locally
**deploy** - done in an integration or release environment, copies the final package to the remote repository for sharing with other developers and projects.
I'm trying to set up a release plugin in a maven project but it fails at deployment of release artifacts in release:perform. The Nexus repository returns 400 and the maven log tells me that the binary is installed twice to my local repo and then also attempted to be uploaded twice.
I get the feeling that it's related to a custom (3rd party) packaging I'm using - but due to business reason I cannot reveal the name of this.
Anyone that think of a "typical" packaging error that would fool maven to install and deploy the jar twice? other artifacts like javadocs, sources etc do not suffer the sample problem.
I have a Gradle project that depends on several open-source projects up on Maven Central. I'd like to install the project – along with all its direct and transitive dependencies – to my local maven repository, so that I could later zip it all up and put it on offline machines.
How do I do it with Gradle/Maven?
mvn dependency:get plugin will fetch the artifact with all dependencies to the local repository.
I had also developed a plugin to install remote artifacts to a local machine.
If you want to later ZIP up your project w/ dependencies and move them to a different machine, you could try Maven's appassembler plugin. It collects all dependencies and creates a launcher, all in the target folder, ready for deployment.
But note, this, by default, creates a flat directory structure with all dependencies, it doesn't preserve the Maven format. It also has the option to create a repository.
I want to share all the External Jars currently being managed by MAVEN with my other team members. I am using Mercurial as my SCM and i am trying to figure what is the easiest way to commit my entire project (include libs) to a repository so that my team members can clone and get running without severe eclipse configuration?
Maven is there in order to help you retrieving libraries. So that, all you have to do is to commit all your files including the pom.xml (.hg should contains everything in target, and other unrelevant files)
Then your project members can pull the sources and run mvn eclipse:eclipse (see eclipse & maven.
And finally import the project in Eclipse.
That was is they need sources...
If they only need the jars, you must put in your infrastructure a company repo that will handle your deployment using mvn deploy. Some information there maven repo::Intro, take special care at the wagon you could use (ftp, ...)
This way, when you're done with your devel and you have pushed your code, you just have to deploy the jar on your repo.
Doing so, your project member'll have to run mvn -U eclipse:eclipse or any goal to update their local repository with your lastest deployed version.