set -ex
if [ "$CLIPPY" = "yes" ]; then
rustup component add clippy-preview
fi
if [ "$DOCS" = "yes" ]; then
cargo install mdbook --force
fi
if [ "$TRAVIS_OS_NAME" = "osx" ] && [ "$GNUPLOT" = "yes" ]; then
brew update
brew install gnuplot
fi
if [ "$RUSTFMT" = "yes" ]; then
rustup component add rustfmt-preview
fi