#!/bin/bash
#
# Build the test app and all examples from the examples directory.
# Expects EXAMPLE_TARGETS, TEST_TARGETS and IDF_TOOLCHAIN environment variables to be set.
# EXAMPLE_TARGETS and TEST_TARGETS variable are the lists of IDF_TARGET values to build the examples and
# the test app for, respectively.
# IDF_TOOLCHAIN compiler toolchain used to build the test app (clang or gcc)
# -----------------------------------------------------------------------------
# Safety settings (see https://gist.github.com/ilg-ul/383869cbb01f61a51c4d).

if [[ -n "${DEBUG_SHELL}" ]]
then
    set -x # Activate the expand mode if DEBUG is anything but empty.
fi

if [[ -z "${EXAMPLE_TARGETS}" || -z "${TEST_TARGETS}" || -z "${IDF_TOOLCHAIN}" ]]
then
    echo "EXAMPLE_TARGETS, TEST_TARGETS and IDF_TOOLCHAIN environment variables must be set before calling this script"
    exit 1
fi

if [[ -z "${SKIP_GNU_MAKE_BUILD}" ]]
then
    echo "SKIP_GNU_MAKE_BUILD not set, will build with GNU Make based build system as well."
    export SKIP_GNU_MAKE_BUILD=0
fi

set -o errexit # Exit if command failed.
set -o pipefail # Exit if pipe failed.
set -o nounset # Exit if variable not set.


STARS='***************************************************'

# -----------------------------------------------------------------------------

die() {
    echo "${1:-"Unknown Error"}" 1>&2
    exit 1
}

# build_for_targets <target list>
# call this in the project directory
function build_for_targets
{
    target_list="$1"
    toolchain="$2"
    for IDF_TARGET in ${target_list}
    do
        export IDF_TARGET
        if [[ "${IDF_TARGET}" = "esp32" ]] && [[ "${SKIP_GNU_MAKE_BUILD}" = "0" ]]
        then
            echo "${STARS}"
            echo "Building in $PWD with Make"
            # -j option will be set via MAKEFLAGS in .gitlab-ci.yml
            # shellcheck disable=SC2015
            make defconfig && make || die "Make build in ${PWD} has failed"
            rm -rf build
        fi

        echo "${STARS}"
        echo "Building in $PWD with CMake for ${IDF_TARGET}"
        rm -f sdkconfig
        idf.py set-target "${IDF_TARGET}"
        idf.py build || die "CMake build in ${PWD} has failed for ${IDF_TARGET}"

        if [[ "${toolchain}" = "clang" ]]
        then
            idf.py clang-check --run-clang-tidy-py run-clang-tidy
        fi

        idf.py fullclean || true
    done
}

# Build the test app
echo "${STARS}"
pushd test_app
build_for_targets "${TEST_TARGETS}" "${IDF_TOOLCHAIN}"
popd

# Build the examples
pushd examples
EXAMPLES=$(find . -maxdepth 1 -mindepth 1 -type d | cut -d '/' -f 2)
for NAME in ${EXAMPLES}
do
    pushd "${NAME}"
    build_for_targets "${EXAMPLE_TARGETS}" "${IDF_TOOLCHAIN}"
    popd
done
popd