.travis.yml

language: generic
cache:
  # Cache the global cargo directory, but NOT the local `target` directory which
  # we cannot reuse anyway when the nightly changes (and it grows quite large
  # over time).
  directories:
    - /home/travis/.cargo

notifications:
  email:
    on_success: never

branches:
  only:
    - staging
    - trying
    - master

before_script:
# Compute the rust version we use. We do not use "language: rust" to have more control here.
- |
  if [[ "$TRAVIS_EVENT_TYPE" == cron ]]; then
    RUST_TOOLCHAIN=nightly
  else
    RUST_TOOLCHAIN=$(cat rust-version)
  fi
# install Rust
- curl https://build.travis-ci.org/files/rustup-init.sh -sSf | sh -s -- -y --default-toolchain "$RUST_TOOLCHAIN"
- export PATH=$HOME/.cargo/bin:$PATH
- rustc --version

script:
- RUSTFLAGS="-D warnings" cargo build --locked