Workaround shared workspace

Author: allanrenucci

.drone.yml

@@ -1,32 +1,42 @@
 pipeline:
+  init:
+    commands:
+      - ln -s /var/cache/drone/ivy2 "$HOME/.ivy2"
+      - ./project/scripts/sbt update
+
   test_legacy:
     group: test
     image: lampepfl/dotty:2017-09-05
     commands:
+      - cp -R . /tmp/0/ && cd /tmp/0/
       - ./project/scripts/sbt legacyTests
 
   test:
     group: test
     image: lampepfl/dotty:2017-09-05
     commands:
+      - cp -R . /tmp/1/ && cd /tmp/1/
       - ./project/scripts/sbt dotty-bootstrapped/test
 
   test_bootstrapped:
     group: test
     image: lampepfl/dotty:2017-09-05
     commands:
+      - cp -R . /tmp/2/ && cd /tmp/2/
       - ./project/scripts/sbt test
 
   test_optimised:
     group: test
     image: lampepfl/dotty:2017-09-05
     commands:
-      - ./project/scripts/sbt "set bootstrapOptimised in ThisBuild := true ;dotty-bootstrapped/test"
+      - cp -R . /tmp/3/ && cd /tmp/3/
+      - ./project/scripts/sbt ";set bootstrapOptimised in ThisBuild := true ;dotty-bootstrapped/test"
 
   test_sbt:
     group: test
     image: lampepfl/dotty:2017-09-05
     commands:
+      - cp -R . /tmp/4/ && cd /tmp/4/
       - ./project/scripts/sbt sbt-dotty/scripted
 
   documentation:

project/scripts/sbt

@@ -10,9 +10,6 @@ if [ -z "$CMD" ]; then
   exit 1
 fi
 
-# get the ivy2 cache:
-ln -s /var/cache/drone/ivy2 "$HOME/.ivy2" || true
-
 # run sbt with the supplied arg:
 sbt -J-Xmx4096m \
     -J-XX:ReservedCodeCacheSize=512m \