Use artifacts to avoid reevaluation

.gitlab-ci.yml

@@ -30,6 +30,9 @@ scala-test:
 
 .hls-template: &hls-definition
   stage: hls
+  artifacts:
+      untracked: true
+      expire_in: 1 hrs
   script:
     - source setup.sh
     - source /opt/cad/xilinx/vivado/Vivado/$VIVADO_VERSION/settings64.sh
@@ -65,21 +68,29 @@ hls-2017.1:
     - tapasco compose [arraysum x 1, arrayupdate x 1] @ 100 MHz
 
 compose-2017.4:
+  dependencies:
+      - hls:hls-2017.4
   variables:
     VIVADO_VERSION: "2017.4"
   <<: *compose-definition
 
 compose-2017.3:
+  dependencies:
+     - hls:hls-2017.3
   variables:
     VIVADO_VERSION: "2017.3"
   <<: *compose-definition
 
 compose-2017.2:
+  dependencies:
+    - hls:hls-2017.2
   variables:
     VIVADO_VERSION: "2017.2"
   <<: *compose-definition
 
 compose-2017.1:
+  dependencies:
+      - hls:hls-2017.1
   variables:
     VIVADO_VERSION: "2017.1"
   <<: *compose-definition