Merge pull request #68 from alicevision/travis-retry-apt

[travis] add travis_retry on apt commands

Author: Carsten Griwodz

.travis.yml

@@ -61,8 +61,8 @@ install:
   - wget http://developer.download.nvidia.com/compute/cuda/repos/ubuntu1404/x86_64/$CUDA_REPO_PKG
   - sudo dpkg -i $CUDA_REPO_PKG
   - rm ${CUDA_REPO_PKG}
-  - sudo apt-get -y update
-  - sudo apt-get install -y --no-install-recommends  cuda-core-$CUDA_PKG_VERSION  cuda-cudart-dev-$CUDA_PKG_VERSION  cuda-cublas-dev-$CUDA_PKG_VERSION cuda-curand-dev-$CUDA_PKG_VERSION
+  - travis_retry sudo apt-get -y update
+  - travis_retry sudo apt-get install -y --no-install-recommends  cuda-core-$CUDA_PKG_VERSION  cuda-cudart-dev-$CUDA_PKG_VERSION  cuda-cublas-dev-$CUDA_PKG_VERSION cuda-curand-dev-$CUDA_PKG_VERSION
   - sudo ln -s /usr/local/cuda-${CUDA_VERSION_MAJOR}.${CUDA_VERSION_MINOR} /usr/local/cuda
 
 before_script: