Update travis config

.travis.yml

@@ -16,7 +16,7 @@ cache:
     - ./miniconda  # Conda environment
     - ./.eggs      # pytest eggs
     - ./build      # Build environment
-    - ./old_ext    # Previous extension
+    - ./cached_ext    # Previous extension
 
 before_install:
   # Add conda to path
@@ -45,16 +45,14 @@ install:
 
 before_script:
   # Make sure old_ext exists
-  - mkdir -p old_ext
-  # Touch all the objects file if the extension hasn't changed
-  - diff old_ext ext && find build -name _tango*.so -printf "touching %p\n" -exec touch {} + || true
+  - mkdir -p cached_ext
+  # Touch the .so files if the extension hasn't changed
+  - diff cached_ext ext && find build -name _tango*.so -printf "touching %p\n" -exec touch {} + || true
 
 script:
   # Build the package
   - python setup.py build
+  # The build directory has been updated, cached_ext needs to be synchronized too
+  - rsync -a --delete ext/ cached_ext/
   # Run the tests
   - python setup.py test
-
-before_cache:
-  # Copy current ext directory
-  - rsync -a --delete ext/ old_ext/