#!/usr/bin/env bash
set -e

# Target triple of the host machine. Set to x86-64 Linux by default, as that's
# the correct value for the CI server.
#
# Unfotunately there doesn't seem to be a way to tell Cargo to just use the
# target of the host machine, and since we override the default target in
# `.cargo/config` for convenience, this variable is required.
HOST_TARGET=${HOST_TARGET:-x86_64-unknown-linux-gnu}

# Determine whether this build should run stable checks. This should be the case
# on CI when the stable channel is used, or locally regardless of Rust version
# used for the build.
[ "$TRAVIS_RUST_VERSION" = stable ] && \
    STABLE_CI_BUILD=true || STABLE_CI_BUILD=false
[ -z "$TRAVIS_RUST_VERSION" ] && \
    NO_CI_BUILD=true || NO_CI_BUILD=false
([ "$STABLE_CI_BUILD" = true ] || [ "$NO_CI_BUILD" = true ]) && \
    STABLE_CHECKS=true || STABLE_CHECKS=false

# Fail build, if there are any warnings.
export RUSTFLAGS="-D warnings"
export RUSTDOCFLAGS="-D warnings"

# Check for formatting with the stable rustfmt
if [ "$STABLE_CHECKS" = true ]; then
    # Only install rustup on stable, since it's not needed otherwise (and sometimes unavailable)
    rustup component add rustfmt
    cargo fmt -- --check
fi

function build() {
    TARGET=$1

    echo ""
    echo "### Building target $TARGET"
    echo ""

    # Only run trybuild on the stable channel. Otherwise changes to compiler
    # output will break the build, until they propagate all the way from nightly
    # to stable.
    [ "$STABLE_CHECKS" = true ] && EXTRA_FEATURES=",trybuild" \
        || EXTRA_FEATURES=""

    # Build and test HAL
    set -x # echo the following build commands
    cargo test \
        --verbose \
        --features=$TARGET,no-target-warning$EXTRA_FEATURES \
        --target=$HOST_TARGET
    cargo build --verbose --features=$TARGET-rt,no-target-warning --examples
    cargo doc --features=$TARGET-rt,no-target-warning

    # Build test suite
    (
        cd test-suite
        cargo build --tests --features=$TARGET
    )

    set +x # disable command echo-ing
}

build 82x
build 845