Hi guys! I hope this is the right place to ask... ...

# gradle

[dave08]

Hi guys! I hope this is the right place to ask... If I have a Jenkins pipeline building my Kotlin (Ktor) project using Gradle, how do I keep the build artifact cache from build to build (the Jenkins slave is always on the same node). I'm currently running: docker run --rm -v "$PWD":/home/gradle/project -w /home/gradle/project gradle:4.5.1-jdk8-alpine gradle shadowJar --no-daemon --console plain?

[gildor]

Just attach ~/.gradle dir to volume

[dave08]

Nope, I tried docker run --rm -v /home/gradle/.gradle -v "$PWD":/home/gradle/project -w /home/gradle/project gradle:4.5.1-jdk8-alpine gradle shadowJar --no-daemon --console plain, no go... am I getting something wrong? Base image FROM openjdk:8-jre-alpine...?

[gildor]

Hmm, not sure how --rm works, mayb it removes also associated volumes without mapping.
Try explicitly connect volume to some local dir to check this:

-v /my/gradle/cache:/home/gradle/.gradle

[gildor]

also check that gradle acutally uses /home/gradle/.gradle as home dir

[dave08]

Gradle gave me: Failed to load native library 'libnative-platform.so' for Linux amd64.

For:

sh 'chown -R 1000:1000 .'
        sh 'mkdir -p /tmp/.gradle; chown -R 1000:1000 /tmp/.gradle'
        sh 'docker run --rm -v "/tmp/.gradle":/home/gradle/.gradle -v "$PWD":/home/gradle/project -w /home/gradle/project gradle:4.5.1-jdk8-alpine gradle shadowJar --no-daemon --console plain'

[dave08]

I thought it had to do w/ dir. permissions, so I added chown on tmp...

[dave08]

Also, it's funny since there's a VOLUME in the image itself: https://github.com/keeganwitt/docker-gradle/blob/431aae214e78e2e44b2edcc9e611cbf8acc2ba19/jdk8-alpine/Dockerfile

[dave08]

at /home/gradle/.gradle

[dave08]

You were right about --rm, though: https://github.com/moby/moby/issues/23023

[dave08]

But even when I named the volume, still no go...

[gildor]

since there’s a VOLUME in the image itself

Right, but not named, so volume deleted

[gildor]

what is your problem now? do you see dependencies inside your local dir when you connected it as volume?

[dave08]

Now it's fine... docker run --rm -v gradle-cache:/home/gradle/.gradle -v "$PWD":/home/gradle/project -w /home/gradle/project gradle:4.7.0-jdk8-alpine gradle shadowJar --no-daemon --console plain! Thanks for the help 😃

[gildor]

👍