.travis.yml

sudo: false

language: cpp

addons: &addons
  apt:
    packages: timeout
    sources: &sources
      - ubuntu-toolchain-r-test
      - llvm-toolchain-precise-3.9

cache:
  apt: true
  ccache: true

# Do not build our sync branch.
branches:
  only:
    - master

matrix:
  # Abort all builds on a single failing matrix entry.
  fast_finish: true

  include:
    # There seems to be a hard limit to how many machines a Travis build will
    # across all platforms. By interleaving OS X, the hope is to get in the
    # queue faster while not blocking Linux builds from occuring.
    - os: linux
      addons:
        apt:
          sources: *sources
          packages: ['clang-format-3.9']
      compiler: clang

script:
- |
  if [ "$TRAVIS_PULL_REQUEST" != "false" ]; then
    BASE_COMMIT=$(git rev-parse $TRAVIS_BRANCH)
    echo "Running clang-format-3.9 against branch $TRAVIS_BRANCH, with hash $BASE_COMMIT"
    COMMIT_FILES=$(git diff --name-only $BASE_COMMIT | grep -i -v LinkDef)
    RESULT_OUTPUT="$(git-clang-format-3.9 --commit $BASE_COMMIT --diff --binary `which clang-format-3.9` $COMMIT_FILES)"
    
    if [ "$RESULT_OUTPUT" == "no modified files to format" ] \
      || [ "$RESULT_OUTPUT" == "clang-format did not modify any files" ] ; then

      echo "clang-format passed."
      exit 0
    else
      echo "clang-format failed."
      echo "To reproduce it locally please run"
      echo -e "\tgit checkout $TRAVIS_BRANCH"
      echo -e "\tgit-clang-format --commit $BASE_COMMIT --diff --binary $(which clang-format)"
      echo "$RESULT_OUTPUT"
      exit 1
    fi
  fi

on_failure:
  -|
  echo "Showing current directory contents"
  ls -la