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# Maintainer: Tobias Powalowski <tpowa@archlinux.org>
# Maintainer: Thomas Bächler <thomas@archlinux.org>
# Contributor: Keshav Padram Amburay <(the ddoott ridikulus ddoott rat) (aatt) (gemmaeiil) (ddoott) (ccoomm)>
# Maintainer (Parabola): André Silva <emulatorman@parabola.nu>

pkgname="syslinux"
pkgver="6.02"
pkgrel="8"
arch=('x86_64' 'i686')
pkgdesc="Collection of boot loaders that boot from FAT, ext2/3/4 and btrfs filesystems, from CDs and via PXE (Parabola rebranded)"
url="http://syslinux.zytor.com/"
license=('GPL2')
options=('!makeflags' '!emptydirs')
backup=('boot/syslinux/syslinux.cfg'
        'boot/syslinux/splash.png')
makedepends=('python2' 'nasm' 'gnu-efi-libs')
depends=('perl' 'glibc')
optdepends=('perl-passwd-md5:  For md5pass'
            'perl-digest-sha1: For sha1pass'
            'mtools:           For mkdiskimage and syslinux support'
            'gptfdisk:         For GPT support'
            'util-linux:       For isohybrid'
            'efibootmgr:       For EFI support'
            'dosfstools:       For EFI support')
install="${pkgname}.install"
source=("https://www.kernel.org/pub/linux/utils/boot/syslinux/${pkgname}-${pkgver}.tar.xz"
        'syslinux.cfg'
        'syslinux-install_update'
        'syslinux-6.02-fix-chainloading.patch'
        'syslinux-6.02-fix-bios-isolinux.patch'
        'syslinux-6.02-fix-efi-ovmf.patch'
        'splash.png')
md5sums=('6f275813a1b08cf852e55c0a3f8fbc78'
         'f048880b57e2c5a7017ff8804bfda327'
         '9376f18fa3e42fc36cffa4cff0a84c09'
         '9dbede6b71a4de9e46aac4aad65334d7'
         'adf71eceb4fccecd9a7efe1ab3d54918'
         '62d22b101ef2ef53e25b4f86d9f41cb5'
         'cb46ca47c6b6323127d908440057d98f')
prepare() {
    
    cd "${srcdir}/${pkgname}-${pkgver}/"
    
    ## Do not try to build the Windows or DOS installers and DIAG files
    sed 's|diag libinstaller dos win32 win64 dosutil txt|libinstaller txt|g' -i "${srcdir}/${pkgname}-${pkgver}/Makefile" || true
    sed 's|win32/syslinux.exe win64/syslinux64.exe||g' -i "${srcdir}/${pkgname}-${pkgver}/Makefile" || true
    sed 's|dosutil/*.com dosutil/*.sys||g' -i "${srcdir}/${pkgname}-${pkgver}/Makefile" || true
    sed 's|dos/syslinux.com||g' -i "${srcdir}/${pkgname}-${pkgver}/Makefile" || true
    sed 's|INSTALLSUBDIRS = com32 utils dosutil|INSTALLSUBDIRS = com32 utils|g' -i "${srcdir}/${pkgname}-${pkgver}/Makefile" || true
    sed 's|install -m 644 -c $(INSTALL_DIAG) $(INSTALLROOT)$(DIAGDIR)|# install -m 644 -c $(INSTALL_DIAG) $(INSTALLROOT)$(DIAGDIR)|g' -i "${srcdir}/${pkgname}-${pkgver}/Makefile" || true
    
    ## Fix FHS manpage path
    sed 's|/usr/man|/usr/share/man|g' -i "${srcdir}/${pkgname}-${pkgver}/mk/syslinux.mk" || true
    
    # fix chainloading
    # http://bugzilla.syslinux.org/show_bug.cgi?id=31
    # http://www.syslinux.org/archives/2013-October/020971.html
    patch -Np1 -i "${srcdir}/syslinux-6.02-fix-chainloading.patch"
    
    # fix bios booting from isohybrid
    # http://www.syslinux.org/archives/2013-November/021189.html
    patch -Np1 -i "${srcdir}/syslinux-6.02-fix-bios-isolinux.patch"

    # fix efi booting in qemu/ovmf
    # http://bugzilla.syslinux.org/show_bug.cgi?id=23
    patch -Np1 -i  "${srcdir}/syslinux-6.02-fix-efi-ovmf.patch"
    
}

_build_syslinux_bios() {
    
    rm -rf "${srcdir}/${pkgname}-${pkgver}-bios/" || true
    cp -r "${srcdir}/${pkgname}-${pkgver}" "${srcdir}/${pkgname}-${pkgver}-bios"
    cd "${srcdir}/${pkgname}-${pkgver}-bios/"
    
    ## Do not try to build syslinux with our default LDFLAGS, it will fail
    unset LDFLAGS
    make PYTHON="python2" bios
    make PYTHON="python2" bios installer
    
}

_build_syslinux_efi64() {
    
    rm -rf "${srcdir}/${pkgname}-${pkgver}-efi64/" || true
    cp -r "${srcdir}/${pkgname}-${pkgver}" "${srcdir}/${pkgname}-${pkgver}-efi64"
    cd "${srcdir}/${pkgname}-${pkgver}-efi64/"
    
    ## Unset all compiler FLAGS for efi64 build
    unset CFLAGS
    unset CPPFLAGS
    unset CXXFLAGS
    unset LDFLAGS
    unset MAKEFLAGS
    
    make PYTHON="python2" efi64
    make PYTHON="python2" efi64 installer
    
}

_build_syslinux_efi32() {
    
    rm -rf "${srcdir}/${pkgname}-${pkgver}-efi32/" || true
    cp -r "${srcdir}/${pkgname}-${pkgver}" "${srcdir}/${pkgname}-${pkgver}-efi32"
    cd "${srcdir}/${pkgname}-${pkgver}-efi32/"
    
    ## Unset all compiler FLAGS for efi32 build
    unset CFLAGS
    unset CPPFLAGS
    unset CXXFLAGS
    unset LDFLAGS
    unset MAKEFLAGS
    
    make PYTHON="python2" efi32
    make PYTHON="python2" efi32 installer
    
}

build() {
    
    cd "${srcdir}/${pkgname}-${pkgver}/"
    
    ## Build syslinux-efi
    if [[ "${CARCH}" == "x86_64" ]]; then
        _build_syslinux_efi64
    fi
    
    if [[ "${CARCH}" == "i686" ]]; then
        _build_syslinux_efi32
    fi
    
    ## Build syslinux-bios
    _build_syslinux_bios
    
}

_package_syslinux_bios() {
    
    cd "${srcdir}/${pkgname}-${pkgver}-bios/"
    
    ## Install Syslinux bios
    make INSTALLROOT="${pkgdir}/" AUXDIR="/usr/lib/syslinux/bios/" bios install
    
    ## Remove syslinux.exe,syslinux64.exe,syslinux.com and dosutil dir
    rm "${pkgdir}/usr/lib/syslinux/bios"/syslinux.{com,exe} || true
    rm "${pkgdir}/usr/lib/syslinux/bios/syslinux64.exe" || true
    rm -rf "${pkgdir}/usr/lib/syslinux/bios/dosutil/" || true
    
    ## Remove com32 and diag dirs
    rm -rf "${pkgdir}/usr/lib/syslinux/bios/diag/" || true
    rm -rf "${pkgdir}/usr/lib/syslinux/bios/com32/" || true
    
    ## Move extlinux binary to /usr/bin
    install -d "${pkgdir}/usr/bin"
    mv "${pkgdir}/sbin/extlinux" "${pkgdir}/usr/bin/extlinux"
    rm -rf "${pkgdir}/sbin/"
    
    ## Install docs
    install -d "${pkgdir}/usr/share/doc"
    cp -ar "${srcdir}/${pkgname}-${pkgver}/doc" "${pkgdir}/usr/share/doc/syslinux"
    
    ## Install the default configuration
    install -D -m0644 "${srcdir}/syslinux.cfg" "${pkgdir}/boot/syslinux/syslinux.cfg"
    
    ## Install the installation and update script
    ## This script is maintained at git://gist.github.com/772138.git
    ## Script not yet updated for syslinux-efi
    install -D -m0755 "${srcdir}/syslinux-install_update" "${pkgdir}/usr/bin/syslinux-install_update"
    
    # Install Parabola splash
    install -D -m644 "${srcdir}/splash.png" "${pkgdir}/boot/syslinux/splash.png"
}

_package_syslinux_efi() {
    
    cd "${srcdir}/${pkgname}-${pkgver}/"
    
    if [[ "${CARCH}" == "x86_64" ]]; then
        cd "${srcdir}/${pkgname}-${pkgver}-efi64/"
        make INSTALLROOT="${pkgdir}/" AUXDIR="/usr/lib/syslinux/" efi64 install
    fi
    
    if [[ "${CARCH}" == "i686" ]]; then
        cd "${srcdir}/${pkgname}-${pkgver}-efi32/"
        make INSTALLROOT="${pkgdir}/" AUXDIR="/usr/lib/syslinux/" efi32 install
    fi
    
}

package() {
    
    cd "${srcdir}/${pkgname}-${pkgver}/"
    
    _package_syslinux_efi
    
    _package_syslinux_bios
    
}