install occ after update

Author: erossignon

.travis.yml

@@ -1,6 +1,9 @@
 language: cpp
 # 18.04
-dist: bionic
+dist: 
+  - bionic
+#  - focal
+
 os:
   - linux
   - osx
@@ -43,23 +46,25 @@ matrix:
     - os: osx
 addons:
   apt:
-    # sources:
-    # - ubuntu-toolchain-r-test
+    sources:
+      sourceline: - ubuntu-toolchain-r-test
     packages:
-    - g++
-    - libtbb2
-    - libtbb-dev
-    - libocct-modeling-algorithms-dev
+      - g++
+      - libtbb2
+      - libtbb-dev
     update: true
   homebrew:
     packages:
-    - tbb
-    - freetype
-    - opencascade
+      - tbb
+      - freetype
+      - opencascade
     update: true
 
 before_install:
-# 
+- 
+  if [[ $TRAVIS_OS_NAME == "linux" ]]; then
+    sudo apt-get install -y --no-install-recommends libocct-data-exchange-dev       
+  fi
 
 # reinstall latest nvm
 - rm -rf ~/.nvm && git clone https://github.com/creationix/nvm.git ~/.nvm && (cd ~/.nvm && git checkout `git describe --abbrev=0 --tags`) && source ~/.nvm/nvm.sh