set -euxo pipefail

main() {
    case $TARGET in
        thumbv*-none-eabi*)
            cargo install --list | grep xargo || \
                cargo install xargo
            rustup component list | grep 'rust-src.*installed' || \
                rustup component add rust-src
            ;;
    esac
}

# NOTE(TRAVIS_BRANCH) Travis is configured to only build *pushes* (not PRs)
if [ $TRAVIS_BRANCH != master ] || [ $TRAVIS_EVENT_TYPE = cron ]; then
    main
fi