maven, how to find out where X:Y artifact came from? - maven-2

I didn't see a clear answer from the same question
How can I figure out where Maven got an artifact from?
I have a jar slf4j-log4j that is sneaking into our project via some other artifact. In eclipse, I click on dependency hierarchy and see the jar there, I click on it and choose exclude from project which doesn't do anything....I try to right click and see if I can see it's parent that brought it into the project....nope.
How to see the graph of all parents from the artifact that was brought in?
This is all because maven doesn't seem to have global excludes like ivy does :( :( :( so I need to exclude this jar on that project that brought it in(and we have too many projects too look at each and every one).
thanks,
Dean

On the command line, do:
mvn dependency:tree -Dincludes=the.groupId
See: dependency:tree mojo
And:
I click on it and choose exclude from project which doesn't do
anything....
Are you using a current version of Eclipse with m2e? Because previous versions with m2eclipse could never do that, but m2e can.

Related

How to see dependency tree for JARS in IntelliJ using SBT

I am using intelliJ IDEA 2017.2.5 for spark-scala using SBT.
i have many dependencies jars but i wanted to know that which jar is getting downloaded or coming along BECOZ of which jar.
For example i have specified Jar_1 in my build.sbt file. Now when the project is built using SBT, along with Jar_1, multiple jars like jar_1.1, jar_1.2, jar_1.3 also gets downloaded. Now when i click on jar_1.3 or jar_1.2 i don't see the directory or any tree like structure which shows that its a child of Jar_1.
This feature is present in Eclipse. Attaching the image which shows this kind of Hierarchy.
As you can see the jars and also it shows that because of which jars it was downloaded. I need to know that whether such thing is available in IntelliJ if yes how to use it
It's not possible in IntelliJ IDEA for the SBT based projects at the moment, please vote for this feature request.

IntelliJ - is there any good Maven plugin?

I am trying IntelliJ 12 and one thing is really disappointing.... this is the maven integration.
I am missing following functionality:
effective pom view
search for particular jar trough dependency hierarchy
classpath should be derived directly from maven pom, and not in some crazy random unknown way. I have the case now, where some dependencies are just omitted, and I can see them when executing mvn dependency:analyze
changes is pom.xml are sometimes not reflected in project (classpath does not change, or has still old dependency and new one), also when I click "reimport"
Does anyone know some other maven plugin? Something like m2e would be really nice ;)
As #tieTYT noticed, there is a 'Dependency popup' (Ctrl+Alt+U, Ctrl+F works there).
Idea can automatically detect changes made to your pom.xml and apply them to project. To enable this, press Ctrl+Shift+A, type 'maven auto', choose "Importing", checkbox "Import Maven project automatically";
See https://stackoverflow.com/a/19582120/417846 for my answer. It at least provides a relatively easy way to get the effective pom.
I just moved from eclipse and my idea was, that there are many different plugins for single technology, well not in this case - case closed.

M2Eclipse can't find dependencies when they are projects in the same workspace

I know there are various known issues with the M2eclipse plugin and I guess this is just one of them. Hopefully someone is aware of a solution or workaround.
We have like 30 projects in our workspace but for clarity lets assume there are only 2: A en B.
B includes A as a dependency in the pom.xml of B.
The problem we have is that in eclipse the classes of A can't be found so you get compilation errors. However, if you 'mvn install' A to deploy it in the local repository and the close project A then everything is fine; no compilation errors. So, if A exists in the project M2Eclipse does not seem to be able to correctly set the classpath in eclipse.
To make things stranger, we also have project C that also depends (in exactly the same way as B) on project A but here we have no compilation errors. We can't identify anything meaningful difference between project B or C; as said, they include A in the same manner.
thanks for your help,
Stijn
P.S. I'm using version 0.10.2.20100623 of the plugin
I've experienced this behavior before, and it has occurred for me in the past when I imported or checked out the maven projects separately.
Prerequisite: make sure you have m2extras installed before you check out a multi-module Maven project: update site
First thing to try: right-click each project and choose Maven -> update project configuration. The plugin might be smart enough to detect that it could be building project references between the projects.
Second thing to try (if your 30 projects are all submodules off one root): this would be easiest, because you could use the SCM integration of m2eclipse to do a "Checkout as Maven Project..." on the root pom. M2eclipse would make a project for the superpom and for each submodule, with project references built appropriately.
Third thing to try: I'd try manually creating project references in the project settings of each project to mirror their interdependencies. It'd be a lot of work, and unless you check in your eclipse .project/.settings (eww), it would have to be done individually for each working copy.
RESOLVED
finally, after agonizing hours I found the cause.
I was focussing on the .classpath and the .settings files but the problem was located in the .project file. This file in project A was missing following entry in the tag natures:
<nature>org.eclipse.wst.common.modulecore.ModuleCoreNature</nature>
Adding this resolved the issues.

Maven Artifact Search is always empty

When using Alt-Insert to insert a dependency into the POM, the Artifact Search is always completely blank regardless of what I search for.
I tried to add repo1 to Settings->Maven->Repository Services, it says "no repository found." I find that hard to believe.
I've also tried to "update" my local repository but that results in an error.
FYI I'm using Community Edition Snapshot.
Thanks!
If you have a brand new IntelliJ install and have never updated your Maven Repository, notice that there is a little "Update" button to the right that becomes clickable when you click on each repository.
Preferences > Build, Execution, Deployment > Build Tools > Maven >
Repositories
The important one is the https://repo.maven.apache.org/maven2/ remote repository, make sure you update it.
I used Artifactory to generate a settings.xml for me, and by default it pointed me to the "libs-releases" repository.
Instead want my "releases" repository to point to the much larger virtual repository "remote-repos."
All it took was a simple change to the options of the "Generate Settings" function.
Weird. The Artifact Search is working fine for me with IntelliJ Community Edition, at least for artifacts from the central repo that has been indexed:
And as you can see above, all repositories declared in POMs known by IntelliJ are listed.
There might be something wrong with your Maven settings. This is a wild guess but is your Maven home directory properly defined? Same for the user settings file? Is Maven actually working fine under IntelliJ?
Solved - by reinstalling Intellij Idea
Search for class tab in Maven Artifact Search popup was always empty
Solution in linux:
remove idea folder (for me it was ~/idea-YOUR_VERSION_HERE)
remove ~/.IntelliJIdeaYOUR_VERSION_HERE folder (settings)
download new version form jetbrains.com, unzip, run installer from bin
It appears to be a blocked port, as I am using my own artifactory repository. Of course, the port it is using looks to be completely undocumented, but WireShark shows it to be 58754. Sounds random, I hope it isn't!

Resolving maven dependencies

Inovking maven2 goal mvn dependency:list on an artifact pom causes to download the whole dependent artifact packages. I think only those pom files are necessary for resolving dependencies. Aren't they?
On the dependecy plugin documentation you can read that dependency:list is an alias for dependency:resolve. What you need is dependency:tree which :
Displays the dependency tree for this project.
Even with dependency:tree you will have to download dependencies.
From Arnaud Héritier (developer on Maven Project)
This is a problem in maven core which doesn't allow in 2.x to resolve dependencies without downloading artifacts.
Each mojo (plug-in in the Apache Maven) has a functionality description. See all dependency plugin functionality.
I am working with the current edition of Maven (the plug-in that shipped with Eclipse Neon), and I'm still working to get my head around how to make it do all the magical things it is claimed to be able to do.
I have the screen pictured below, in which the dependency highlighted in the left pane is unresolved.
!Dependency tree, showing missing dependency1
I thought that selecting (executing) the Update Project item off the project's context menu, as shown in the following image, would resolve it, but it left me with three errors, all, one way or another, the result of a missing dependency.
!Maven fly-out menu in project context menu2
By examining the file system, I have confirmed that the dependency is, in fact, absent.
Color me confused; why didn't that action download the missing dependency?