Create Qt5 runtime archive for GR CI MinGW cross compiling jobs

#!/bin/bash


########################################################################################################################
#
# Script which creates a `qt5-runtime-Windows-i686.tar.gz` or `qt5-runtime-Windows-x86_64.tar.gz` for GR CI jobs
# (Windows Cross compiling with MinGW).
#
########################################################################################################################


DLL_LIST=( \
    "Qt5Core.dll" \
    "Qt5Gui.dll" \
    "Qt5Network.dll" \
    "Qt5Widgets.dll" \
    "d3dcompiler_47.dll" \
    "libGLESv2.dll" \
    "libstdc++-6.dll" \
    "libwinpthread-1.dll" \
)

LIBGCC_32="libgcc_s_dw2-1.dll"
LIBGCC_64="libgcc_s_seh-1.dll"

INCLUDE_DIRECTORIES=( \
    "QtCore" \
    "QtGui" \
    "QtNetwork" \
    "QtWidgets" \
)

PLATFORM_DLL_LIST=( \
    "qwindows.dll" \
)


main () {
    local qt_dir target_dir arch dll_name include_dir_name platform_dll_name

    qt_dir="$1"
    target_dir="$2"
    if [[ -z "${qt_dir}" || -z "${target_dir}" ]]; then
        >&2 echo "Usage: $0 qt_dir target_dir"
        return 1
    fi

    if [[ -d "${target_dir}" ]]; then
        >&2 echo "The target_dir must not exist yet!"
        return 1
    fi

    # Check if `qt_dir` ends with `32`
    if [[ "${qt_dir%32}" != "${qt_dir}" ]]; then
        arch="i686"
    else
        arch="x86_64"
    fi

    mkdir "${target_dir}" && \
    for dll_name in "${DLL_LIST[@]}"; do
        cp -v "${qt_dir}/bin/${dll_name}" "${target_dir}/" || return
    done
    if [[ "${arch}" == "i686" ]]; then
        cp -v "${qt_dir}/bin/${LIBGCC_32}" "${target_dir}/" || return
    else
        cp -v "${qt_dir}/bin/${LIBGCC_64}" "${target_dir}/" || return
    fi

    mkdir "${target_dir}/include" && \
    for include_dir_name in "${INCLUDE_DIRECTORIES[@]}"; do
        cp -rv "${qt_dir}/include/${include_dir_name}" "${target_dir}/include/" || return
    done

    mkdir "${target_dir}/cmake" && \
    curl -fL "https://gr-framework.org/downloads/3rdparty/qt5-runtime-Windows-i686.tar.gz" | \
        tar -Oxzf - "./cmake/FindQt5.cmake" > "${target_dir}/cmake/FindQt5.cmake" || return

    mkdir "${target_dir}/platforms" && \
    for platform_dll_name in "${PLATFORM_DLL_LIST[@]}"; do
        cp -v "${qt_dir}/plugins/platforms/${platform_dll_name}" "${target_dir}/platforms/" || return
    done

    tar -C"${target_dir}" -czf "${target_dir}/qt5-runtime-Windows-${arch}.tar.gz" \
        $(cd "${target_dir}" && find . -name "*.dll") \
        "cmake" \
        "include" \
        "platforms" || return
}

main "$@"