(maint) auto configure lein local-repo for caching between builds

docker/README.md

@@ -95,6 +95,9 @@ This container assumes that the code you're building will be in `/workspace`. Th
 will be copied into `/output` before the container terminates, and if you're building a
 custom ezbake that will be cloned into `/ezbake`.
 
+If `/repo` is volume mapped, lein will automatically be configured to it as the local-repo.
+Useful for saving the maven repository cache between builds.
+
 1. Run from a remotely accessible repo (github, gitlab, etc)
 
 This is by far the fastest build option, but does require the extra step of committing and pushing your code

docker/ezbake/docker-entrypoint.sh

@@ -6,6 +6,14 @@ source /.docker_build_args
 
 echo "Ezbake docker image $version, build $build_date, ref $vcs_ref, source $source_url"
 
+# setup maven repository cache
+if [ -d /repo ] ; then
+  cp -na /root/.m2/repository/* /repo/
+  rm -rf /root/.m2/repository
+  ln -s /repo /root/.m2/repository
+  echo '{:user {:local-repo "/repo"}}' > /root/.lein/profiles.clj
+fi
+
 if [ -n "$EZBAKE_REPO" ]; then
   echo "cloning $EZBAKE_REPO"
   git clone $EZBAKE_REPO /ezbake