I've set up a Scala project in IntelliJ idea with several dependency libraries auto-downloaded by the IDE from Maven repositories, using the built-in support for this functionality. The libraries are then automatically downloaded into a local folder and everything works as expected.
My problem is when some of those libraries go missing- either because I've deleted them, or because I'm pulling the project from a clean machine and the library binaries aren't included in version control. I'd like to tell IDEA to automatically re-download all dependency libraries from the Maven repository; I know this is possible because all the necessary information can be found in the .iml file.
If I manually go to every library in the "Project Structure" dialogue and click "Edit," I can repeat the original workflow to redownload from Maven repo without touching any settings. This is inconvenient when there are many libraries, though. Is there any way to tell IDEA to just do this for me for all Maven repo libraries included in the project?
It would be easier to use Apache Maven and maintain a pom file with a list of all dependencies (with the possibility to keep it in source control, etc) which you can simply reimport whenever you need to. IntelliJ and Maven will then manage all your libraries for you, along with their javadocs and sources. There are many, many, other benefits from this approach -- it is highly recommended.
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I'd like to know what will Intellij IDEA do with my Maven project when I click "build the project"?
How will Intellij build the project with Maven?
Intellij IDEA will not automatically do a make install when you do a Build Project. In order to do that, proceed as follows:
Under Maven Projects tab (usually on the right hand side), select the goals you want Intellij to run after a Build -> Make Project and then right click and select the trigger (for instance in the above snapshot, the trigger was chosen as 'Execute After Make'. You can choose whatever you wish).
After doing this a Build -> Make Project will run a mvn clean install as well.
IntelliJ's build system refers to the Maven ecosystem for some hints, but at the end of the day it is a separate build system.
In IntellIJ, you have a Project, with many Modules. These are both IntelliJ concepts.
An IntelliJ Module has a responsibility to understand what are its dependencies and libraries. This can be done purely with IntelliJ semantic, or IntelliJ can allow some other build system to declare the dependencies and libraries. That is to say: the IntelliJ Module can be based on a Maven pom.xml or Gradle's build.gradle.
When you click "Make" on an IntelliJ Java Module: IntelliJ will check which libraries your Module asks for, and also resolve the dependencies of your Module to work out which libraries its dependent Modules ask for.
Once the libraries are known: IntelliJ will invoke Javac or the Eclipse Compiler (whichever you've configured as your Java compiler) with all those libraries on the classpath. And it will output a jar, not a Maven artefact.
IntelliJ Make will not run a mvn compile or similar (unless you configure it to explicitly, as per #Ashutosh Jindal's answer.
Why would IntelliJ use its own, separate build system, when you've provided an authoritative definition for how you'd like to build your project? I can imagine various reasons:
Maven generally just outputs an artefact (sources and binary jars, and a pom.xml), whereas IntelliJ needs additional semantic and indexes to provide all its IDE intelligence. It makes sense to perform the indexing process alongside the compile, since: if you do the compile incrementally, you can understand incrementally which indexes are dirtied also.
The IDE benefits from being involved in the compilation process. For example: IntelliJ can do "continue on error" builds using the Eclipse compiler. Additionally, the Eclipse compiler can be used to compile only those files which have changed (IDEs watch you as you code, so they know very well which files are dirtied). I have heard that Maven does incremental compile, but I don't know how its performance compares.
In order to support a variety of build systems (Ant, Maven, Gradle): the easiest engineering choice for IntelliJ is to rely on the minimum possible amount of domain-specific semantic, and use that to inform one IntelliJ-specific build system. This allows them to re-use a large amount of code, and have few domain-specific differences.
I found a pretty old post with this question but unfortunately he didn't get any help. I hope someone can assist me.
I created a repo at GitHub. After cloning it to my computer I tried to add the following framework support: Maven, JSF, EJB, CDI, etc. I know I could add the files manually. But, I want to use what the IDE has to offer.
However, the only framework showing up is SQL, which is different from this post from stackoverflow and from their documentation.
Has anyone had this same problem and got it working?
Intellij reacts to changes in your Maven pom.xml file. Maven does not react to changes in your IntelliJ project module settings.
The steps that you should follow here are
Close IntelliJ
In a command shell, clone your Github repository.
Using an editor external to IntelliJ such as VI or Notepad, create a pom.xml in the root directory. Better yet, use a Maven Archetype to generate your pom.xml.
Now open IntelliJ. Choose File, New, Project From Existing Sources. Navigate to your pom.xml and follow the prompts.
I recommend checking Search for projects recursively and Import Maven projects automatically.
Finish the project creation.
Now, add dependencies to your pom.xml via the dependencies tag. See Maven Dependencies. Intellij will automatically react to dependencies that you add as long as it can see a Maven Repository on your local machine or on your network or on the Internet.
I know it is a little bit to late but I just post it because it is still an possible issue: You need to open YourProjectName.iml and make sure that the type (<module type="JAVA_MODULE" version="4">) is JAVA_MODULE and not something else!(In my case it was WEB_MODULE)
I'm using IntelliJ IDEA 12, its Play2.0 plugin for a Java project.
Unfortunately Play 2 (2.1.4 at this time) does not ship with the sources for its dependencies, and running idea with-sources=yes only downloads the project's dependencies sources.
So far I've had to manually download the source jars and attach them whenever I needed them.
Of course I have to redo this every time the Play framework is updated.
Is there any better way, either within play, which I would prefer, or with an external solution?
Unfortunately IDEA's "Search in internet..." button usually doesn't work, most likely because it's looking on the wrong respositories. I suspect it is trying to use the Maven settings with the configured Nexus repos, but AFAIK Maven central is not in there.
It is as simple as running update-classifiers in the Play console and then regenerating the project files.
I wish this would be done automatically, but apparently it is too obvious to sbt users.
I have 2 completely separate projects where one depends on the other. I've very recently mavenized the main project but can mavenise the dependency if absolutely necessary.
Originally these were Netbeans projects, with the main project having several modules. What I liked is that I could declare the dependency as a dependent project. This allowed me to use the most recent code as it changes a lot (the project is in its infancy). NetBeans would put the dependent project on the classpath when running, and build a jar in the /dist directory when doing a clean and build.
Now that the main project is in maven, I can't do this anymore. The only alternative I've found was to manually copy it into the project repository, but that removes a lot of automation and ease of use. Every time I wanted to test a change I would have to rebuild the dependency, move it to the buried project repository folder, rename it appropiatly, switch back to NetBeans, then run. This is vs clicking run and everything being done automatically.
Maybe I'm just lazy, but is there an easy way to do this?
I have 2 completely separate projects where one depends on the other. I've very recently mavenized the main project but can mavenize the dependency if absolutely necessary.
Mavenizing the dependent project would help a lot. Like Eclipse or IntelliJ, NetBeans supports something Eclipse calls Workspace dependency resolution: if a project A depends on a project B and you open both of them in your IDE, A can be configured to depend on B sources instead of B jar (and any change would become immediately visible).
mavenizing the depedency project is the best option.
Alternatively you might get away with using a system scope dependency which points to the dependency project's dist/ folder jar artifact.
I recently started to use Maven2 in one of my Java web application projects. Now I had many issues with it, some times project fails to build for no apparent reason and then it suddenly starts to work when nothing was done at all to project. Or some times our project members must delete project from their harddrive and download project again from SVN. There seems to be many very odd bugs in Maven in eclipse, but there some issues I would like know if it is possible to solve this issues.
1) I have understood that Maven2 should be able to get dependencies for added jars, but when I add a new dependency in Eclipse, it fails when I build it, it says dependecies are missing. How can I make maven to download those missing dependecies automatically?
2) I have Tuckey UrlRewrite Filter in use, but public repositories have only old version of this dependecy, so when I use this old version (3.1 when I need 3.2). How can I include this to project? We have many programmers in this project, so setting up local repository would mean that all our programmers would have to install that local repository.
Now I had many issues with it, some times project fails to build for no apparent reason and then it suddenly starts to work when nothing was done at all to project. (...)
Ok and what is the point of this free rant? I use Maven and my builds are 100% reproducible, there are well known practices to follow to achieve this. Maybe you're just not following them. Anyway if you're not happy with it, what can I say, don't use it.
I have understood that Maven2 should be able to get dependencies for added jars, but when I add a new dependency in Eclipse, it fails when I build it, it says dependencies are missing. How can I make maven to download those missing dependencies automatically?
I think you misunderstood, Eclipse won't guess what Maven coordinates to add if you don't provide the required informations for them. Dependencies must be declared in the POM, either by editing the POM manually or by using m2eclipse wizards.
And if this is what you did (and if I misunderstood the question) then please provide the <dependency> declaration and the exact error trace.
I have Tuckey UrlRewrite Filter in use, but public repositories have only old version of this dependecy, so when I use this old version (3.1 when I need 3.2). How can I include this to project? We have many programmers in this project, so setting up local repository would mean that all our programmers would have to install that local repository.
This question has already been asked several times, see for example Maven, how to add additional libs not available in repo where I suggest two possible solutions (use a corporate repository like Nexus or a "file-based" repository, the former suggestion being the preferred one for a long term solution).