Force re-download of release dependency using Maven
I'm working on a project with dependency X. X, in turn, depends on Y.
I used to explicitly include Y in my project's pom. However, it was not used and to make things cleaner, I instead added it to X's pom as a dependency. X is marked as a release dependency.
The problem is that after removing Y from my project's pom and adding it to X's pom, my project isn't picking it up on mvn -U clean package. I know -U update snapshots but not releases.
So, without deleting the ~/.m2/repository directory how can I force a re-download of X's pom? Also, I tried running dependency:purge-local-repository and it didn't work either.
X's pom, then it should constitute a new release, even if it's only a patch number change: 1.3 -> 1.3.1. So, that would eliminate this problem from the get-go.
dependency:purge-local-repository should work, does it not delete it?
You cannot make Maven re-download dependencies, but what you can do instead is to purge dependencies that were incorrectly downloaded using mvn dependency:purge-local-repository
See: http://maven.apache.org/plugins/maven-dependency-plugin/purge-local-repository-mojo.html
This looks up the list of all transitive dependencies of the current project, deletes them, then redownloads them. You can even add it as a plugin into your pom if you want to run it with every build.
I just deleted my ~/.m2/repository and that forced a re-download ;)
Based on Ali Tokmen answer. I managed to force delete a single specific local dependency with the following command:
mvn dependency:purge-local-repository -DmanualInclude=com.skyfish:utils
With this, it removes utils from my .m2/repository and it always re-download the utils JAR dependency when I proceed to run mvn clean install. If you want something more programmatic possibly also see the -Dinclude=... option.
I think following command may help you!
mvn -U clean install
Project right click-> Maven -> Update Project and check the checkboxes as in the screen shot. It will update releases as well :)
https://i.stack.imgur.com/peNZX.png
-U command to maven, which "kind of" updates releases stackoverflow.com/a/29020990/32453 but not the way the OP was looking for :)
mvn clean install -U
-U means force update of dependencies.
If you want to update a single dependency without clean or -U you could just remove it from your local repo and then build.
If you know the group id of X, you can use this command to redownload all of X and it's dependencies
mvn clean dependency:purge-local-repository -DresolutionFuzziness=org.id.of.x
It does the same thing as the other answers that propose using dependency:purge-local-repository, but it only deletes and redownloads everything related to X.
When you added it to X, you should have incremented X's version number i.e X-1.2 Then X-1.2 should have been installed/deployed and you should have changed your projects dependency on X to be dependent on the new version X-1.2
If you really want to force-download all dependencies, you can try to re-initialise the entire maven repository. Like in this article already described, you could use:
mvn -Dmaven.repo.local=$HOME/.my/other/repository clean install
Just delete ~/.m2/repository...../actual_path where the invalid LOC is coming as it forces to re-download the deleted jar files. Dont delete the whole repository folder instead delete the specific folder from where the error is coming.
Deleting the ~/.m2/repository will solve your problem. But, if you still need to keep the old ~/.m2/repository you can just change the maven local path temporarily.
If you are working on IntelliJ just go to Maven Settings and change the Local Repository path to somewhere else. You may need to tick the override checkbox near there.
https://i.stack.imgur.com/fshTJ.png
Go to build path... delete existing maven library u added... click add library ... click maven managed dependencies... then click maven project settings... check resolve maven dependencies check box..it'll download all maven dependencies
Most answers provided above would solve the problem.
But if you use IntelliJ and want it to just fix it for you automatically, go to Maven Settings.
Build,Execution, Deployment -> Build Tools -> Maven
https://i.stack.imgur.com/U3QUX.jpg
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mvn dependency:purge-local-repository clean package, may be one project delete the same dependency in local repository while another project is running compile. How to avoid?MAVEN_OPTSenvironment variable to force maven to download/use dependencies from a different folder from the standard.m2/respositorylocation, like so:export MAVEN_OPTS="-Dmaven.repo.local=${PROJECT_DIR}/maven.repositoryThis will prevent maven from using any dependencies in the normal folder and use the one specified byDmaven.repo.local=instead.