It might be a stupid question, but I'm new to maven. My question is simple: what happens exactly when using build, clean and build, and build with dependencies? and when to use each one?
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For projects which take a long time to build, can you issue the maven compile or maven install commands and then continue making changes to the files in your repository, without these changes affecting the outcome of the maven install command?
Is a snapshot automatically taken when the command is issued? If not, is there a way to request that maven take a snapshot of the project when a command is issued, so that you could continue making changes after that snapshot?
If you build locally, you should not be changing files while you build because you might break the build.
If you build on a build server, it depends:
If you run a clean package or clean install, then there is just one checkout at the beginning. After that it should not be a problem to make further commits.
If you build a release with Maven release plugin, you should probably be more careful. I haven't actually seen any problems in nature yet, but since the Maven release plugin commits to git/svn itself, you might cause problems when committing during the build on the same branch.
I'm currently starting to get into Maven.
I've been tasked to create a maven environment for a large pre-existing project and I want the build environment to be as portable as possible. My problem is, that on a machine with a fresh maven installation, my project does not seem to download transitive dependencies when in run 'mvn install'.
Currently maven comes up with a build order like this:
ProjA
ProjB
Project A has some dependencies and code that Project B depends on. So I set Project B to only depend on Project A. When running 'mvn install' though, compilation of ProjB fails, because it says it is missing a package that ProjA depends on.
Am I running the wrong command for a fresh setup, or do I have to add a specific line in the POM of Project B to make it work on a fresh machine?
Thanks in advance.
when I search for installing maven, I found videos on how to instal maven on eclipse and how to instal maven on MAc.It may be very basic question but just wondering whats the purpose of installing maven on MAC? I use maven on eclipse already
You would install Maven to be able to execute the mvn command from the command line (usually Terminal.app). This is usually because you need to do things that your IDE does not easily allow you to do, or to ensure that your project builds correctly with plain Maven.
This is important because the Maven emulation in Eclipse is good but not perfect (as there are some design decisions in Eclipse that do not work well with the Maven mindset). A typical situation is that Eclipse does not treat src/test different from src/main and Maven does. The easiest way to ensure this, is to build your projects from the command line once in a while.
I have two maven projects in Netbeans. How can I add one as dependency for another?
In Intellij IDEA I can just add <dependency> and it works fine. But Netbeans can't resolve this dependency this way.
You should be able to do so, in Netbeans. Just make sure to have the project, you want to use as dependency, is built into your maven-local-repo by executing a maven-install.
I don't know how it works in Netbeans, but in Eclipse you can just Rightclick -> Run as-> Maven Install to install your project.
Maybe in Netbeans, you have to use the Maven-cmd-tool. Just navigate to the location in your project, where your pom.xml is, and run mvn install. That should install your project into your maven-local-repo. After that, just run mvn clean install -U in your other project, which uses the previously built project as dependency, and it should recognize the dependency.
I'm new to compiled web development, and I'm just trying to figure out the build/deploy process.... I've done:
mvn clean install
on a project, which built and deployed the project and now I can see it. If I want to make changes to the codebase, do I really need to run mvn clean install again to re-build and deploy the changes or is there a way to do a quicker build without using a "proper" IDE?
I'm using vim/gvim
Thanks!
Maven already handles the dependencies and only re-builds the necessary files... unless you throw away all previous build artifacts with clean! You should only need to use clean when you run into problems, or when you have checked out a different version from version control. Usually, mvn install should suffice.
You can integrate that with Vim; the simplest is to
:set makeprg=mvn
and then trigger a build with :make install.
Plugins build on that simplistic setup, e.g. check out:
maven-plugin
maven-ide