Update .gitlab-ci.yml

.gitlab-ci.yml

@@ -28,3 +28,16 @@ centos7:
     - cd build
     - cmake -DCMAKE_INSTALL_PREFIX=../install ../sources/
     - make -j4
+
+ubuntu20.04-prebuild:
+  image: gitlab-registry.in2p3.fr/ganilanalysis/docker:6.22.08-ubuntu20.04
+  stage: build
+  script:
+    - export ROOTSYS=/opt/root/
+    - export PATH=$ROOTSYS/bin/:$PATH
+    - export LD_LIBRARY_PATH=$ROOTSYS/lib/:$LD_LIBRARY_PATH
+    - mkdir -p build
+    - mkdir -p install
+    - cd build
+    - cmake -DCMAKE_INSTALL_PREFIX=../install ../sources/
+    - make -j4