Change location of .m2/ and .tooling/ from HOME

[jarek083]

When I'm using this LSP, two cache directories are created in my home directory. I've tried to make wrapper and set HOME=$XDG_CACHE_HOME or pass -Duser.hom=$XDG_CACHE_HOME, but those are still created in home.

~/.tooling is especially bad, as I have other tool which uses this directory, but for important data, not cache.

Could ~/.m2 and ~/.tooling be moved to something like $XDG_CACHE_HOME/eclipse.jdt.ls/m2 and $XDG_CACHE_HOME/eclipse.jdt.ls/tooling?

Environment variables to control those would be fine too.

[rgrunber]

While we don't currently support configuring the local repository ($HOME/.m2/repository/) directly, we do have java.configuration.maven.userSettings and java.configuration.maven.globalSettings which configure the location of the user/global settings file. That file, among other things can configure the location of the local repository. See https://maven.apache.org/ref/3.6.3/maven-settings/settings.html for more details on what can be configured there.

So in your properties file, you could just set java.configuration.maven.userSettings=/my/preferred/location/settings.xml and in the settings file ensure you have <localRepository>/my/preffered/repository/location/</localRepository>

I think you could even avoid setting the property if you don't mind placing the settings file in ${user.home}/.m2/settings.xml (according to #1586 (review)).

As for .tooling, looking at places like https://github.com/eclipse/eclipse.jdt.ls/blob/8028f3ffc04e7f4695ffa08d058912e2003a0116/org.eclipse.jdt.ls.core/src/org/eclipse/jdt/ls/internal/gradle/checksums/WrapperValidator.java#L256 , it seems to be hard coded for now.

[snjeza]

As for .tooling, looking at places like
eclipse.jdt.ls/org.eclipse.jdt.ls.core/src/org/eclipse/jdt/ls/internal/gradle/checksums/WrapperValidator.java
Line 256 in 8028f3f
return new File(System.getProperty("user.home"), ".tooling/gradle/versions.json");
, it seems to be hard coded for now.

This was a buildship upstream issue - https://github.com/eclipse/buildship/blob/REL_3.1.4/org.eclipse.buildship.core/src/main/java/org/eclipse/buildship/core/internal/util/gradle/PublishedGradleVersions.java#L221
The issue has been fixed - https://github.com/eclipse/buildship/blob/REL_3.1.5/org.eclipse.buildship.core/src/main/java/org/eclipse/buildship/core/internal/util/gradle/PublishedGradleVersions.java#L221
We should update Java LS.