Make building Scala client work on Github Actions (#4198)

Fixes running `mage buildScala` on Github Actions as part of CI.

---------

Signed-off-by: Enrico Minack <github@enrico.minack.dev>

build/scala-client/Dockerfile

@@ -19,6 +19,7 @@ RUN set -ex && \
     apt-get clean && \
     rm -rf scala-${SCALA_VERSION}.deb sbt-${SBT_VERSION}.tgz /var/lib/apt/lists/*
 
+ENV PATH="/sbt/bin:$PATH"
 COPY scripts/build-scala-client.sh /
 RUN chmod +x /build-scala-client.sh
 

magefiles/scala.go

@@ -32,5 +32,6 @@ func BuildScala() error {
 		"--rm",
 		"-v", fmt.Sprintf("%s:/build", wd),
 		"-w", "/build",
+		"--env", "HOME=/tmp",
 		"armada-scala-client-builder")
 }

scripts/build-scala-client.sh

@@ -2,8 +2,6 @@
 # This script is intended to be run under the docker container
 # in the root dir of the Armada repo
 
-export PATH=/sbt/bin:$PATH
-
 ROOT=$(pwd)
 SDIR=client/scala/scala-armada-client