language: go
dist: trusty

go:
  - 1.8
  - 1.9rc1

before_install:
  - echo $PATH
  - export PATH=`echo $PATH | sed -e 's/:\/usr\/local\/clang-3.5.0\/bin//'`
  - wget http://security.ubuntu.com/ubuntu/pool/main/g/gcc-5/libstdc++6_5.4.0-6ubuntu1~16.04.4_amd64.deb
  - mkdir ./libc
  - dpkg-deb -x ./libstdc++6_5.4.0-6ubuntu1~16.04.4_amd64.deb ./libc
  - export LD_LIBRARY_PATH=`pwd`/libc/usr/lib/x86_64-linux-gnu/
  - wget http://releases.llvm.org/4.0.1/clang+llvm-4.0.1-x86_64-linux-gnu-debian8.tar.xz
  - tar -xf ./clang+llvm-4.0.1-x86_64-linux-gnu-debian8.tar.xz
  - sudo cp clang+llvm-4.0.1-x86_64-linux-gnu-debian8/bin/clang-format /usr/local/bin/
  - which clang-format
  - clang-format --version

install: true

script:
  - make presubmit
  - test -z $(git diff --name-only) # check that the diff is empty after formatting the code

# If the build fails because some code in not formatted, it's nice to see the diffs after formatting.
after_failure:
  - git diff --name-only
  - git diff