Prepopulate mvn cache before building vscode-concourse snapshot

concourse/tasks/build-vsix.sh

@@ -3,6 +3,14 @@ set -e
 workdir=`pwd`
 sources=$workdir/sts4/vscode-extensions/$extension_id
 
+if [ -d "maven-cache" ]; then
+    echo "Prepopulating maven cache"
+    tar xzf maven-cache/*.tar.gz -C ${HOME}
+else
+   echo "!!!No stored maven cache found!!! "
+   echo "!!!This may slow down the build!!!"
+fi
+
 cd ${sources}/../commons-vscode
 npm install
 

concourse/tasks/build-vsix.yml

@@ -1,5 +1,6 @@
 inputs:
 - name: sts4
+- name: maven-cache
 outputs:
 - name: out
 platform: linux