# Maintainer: David P. <megver83@parabola.nu>
# Contributor: André Silva <emulatorman@hyperbola.info>
# Contributor: Márcio Silva <coadde@hyperbola.info>
# Contributor: Nicolás Reynolds <fauno@kiwwwi.com.ar>
# Contributor: Sorin-Mihai Vârgolici <smv@yobicore.org>
# Contributor: Michał Masłowski <mtjm@mtjm.eu>
# Contributor: Luke Shumaker <lukeshu@sbcglobal.net>
# Contributor: Luke R. <g4jc@openmailbox.org>

# Based on linux-rt package

pkgbase=linux-libre-rt
_pkgbasever=4.9-gnu
_pkgver=4.9.47-gnu
_rtbasever=4.9
_rtpatchver=rt37

_replacesarchkernel=('linux%') # '%' gets replaced with _kernelname
_replacesoldkernels=() # '%' gets replaced with _kernelname
_replacesoldmodules=() # '%' gets replaced with _kernelname

_srcname=linux-${_pkgbasever%-*}
_archpkgver=${_pkgver%-*}_${_rtpatchver}
pkgver=${_pkgver//-/_}.${_rtpatchver}
pkgrel=1
rcnrel=armv7-x5
arch=('i686' 'x86_64' 'armv7h')
url="https://rt.wiki.kernel.org/"
license=('GPL2')
makedepends=('xmlto' 'docbook-xsl' 'kmod' 'inetutils' 'bc' 'libelf')
makedepends_armv7h=('git')
options=('!strip')
source=("https://linux-libre.fsfla.org/pub/linux-libre/releases/${_pkgbasever}/linux-libre-${_pkgbasever}.tar.xz"{,.sign}
        "https://linux-libre.fsfla.org/pub/linux-libre/releases/${_pkgver}/patch-${_pkgbasever}-${_pkgver}.xz"{,.sign}
        "https://www.kernel.org/pub/linux/kernel/projects/rt/${_rtbasever}/older/patch-${_pkgver%-*}-${_rtpatchver}.patch.xz"
        "https://www.kernel.org/pub/linux/kernel/projects/rt/${_rtbasever}/older/patch-${_pkgver%-*}-${_rtpatchver}.patch.sign"
        "https://repo.parabola.nu/other/linux-libre/logos/logo_linux_clut224.ppm"{,.sig}
        "https://repo.parabola.nu/other/linux-libre/logos/logo_linux_mono.pbm"{,.sig}
        "https://repo.parabola.nu/other/linux-libre/logos/logo_linux_vga16.ppm"{,.sig}
        # the main kernel config files
        'config.i686' 'config.x86_64' 'config.armv7h'
        # pacman hook for initramfs regeneration
        '90-linux.hook'
        # standard config files for mkinitcpio ramdisk
        'linux.preset'
        'change-default-console-loglevel.patch'
        '0001-usb-serial-gadget-no-TTY-hangup-on-USB-disconnect-WI.patch'
        '0002-fix-Atmel-maXTouch-touchscreen-support.patch'
        # armv7h patches
        "https://repo.parabola.nu/other/rcn-libre/patches/${_pkgver%-*}/rcn-libre-${_pkgver%-*}-${rcnrel}.patch"{,.sig}
        '0001-ARM-atags-add-support-for-Marvell-s-u-boot.patch'
        '0002-ARM-atags-fdt-retrieve-MAC-addresses-from-Marvell-bo.patch'
        '0003-SMILE-Plug-device-tree-file.patch'
        '0004-fix-mvsdio-eMMC-timing.patch'
        '0005-net-smsc95xx-Allow-mac-address-to-be-set-as-a-parame.patch'
        '0006-set-default-cubietruck-led-triggers.patch'
        '0007-exynos4412-odroid-set-higher-minimum-buck2-regulator.patch')
sha512sums=('885eb0a7fab45dc749acb4329b4330a43b704df2d5f2f5aac1811503c132ca53ca49452f9b1cc80b0826c7a4962dbe4937aecb697aa823b2543ba2cabc704816'
            'SKIP'
            '8a9dc40c14b9d5b621c3121563991ab3384a3b75df70fdaf6209f9957e83629c2e3315e4b62edfcf416eed3f247fa069509bfc42603db941d742a6972a4fb903'
            'SKIP'
            'b41e77788f29f825d7de923b9601668a27298ed21c6ca44576f67c0db48795b8b22f32bcdb713eb79792e4d1b286dce1387faa3418a306034516023943047609'
            'SKIP'
            '13cb5bc42542e7b8bb104d5f68253f6609e463b6799800418af33eb0272cc269aaa36163c3e6f0aacbdaaa1d05e2827a4a7c4a08a029238439ed08b89c564bb3'
            'SKIP'
            '267295aa0cea65684968420c68b32f1a66a22d018b9d2b2c1ef14267bcf4cb68aaf7099d073cbfefe6c25c8608bdcbbd45f7ac8893fdcecbf1e621abdfe9ecc1'
            'SKIP'
            '7a3716bfe3b9f546da309c7492f3e08f8f506813afeb1c737a474c83313d5c313cf4582b65215c2cfce3b74d9d1021c96e8badafe8f6e5b01fe28d2b5c61ae78'
            'SKIP'
            'd0f0bf985c163a524f56426a6f5b9b6490715ed4c858dd45b5adb73369343403c335a420dad6481306cbd8b762388a671b01aabccafcfdf54f7e5abd62811bbe'
            '31d68fd670fd954bcfb024bdac75a093de74c63008bde02f930ef9b7f30e438d3f12415f8435288dec8fc9e71b0ad8df8f10eaa35c8beebd4903cf59a7c5971e'
            '9208d62aa73752cc95a3584ecf245ce94058a0ac05bb5e8434dda100917a1725408cade525aeff6c2697f53bb4aff028bda69cb9c3b697bcdd7f8ae389ed2cc4'
            'd6faa67f3ef40052152254ae43fee031365d0b1524aa0718b659eb75afc21a3f79ea8d62d66ea311a800109bed545bc8f79e8752319cd378eef2cbd3a09aba22'
            '2dc6b0ba8f7dbf19d2446c5c5f1823587de89f4e28e9595937dd51a87755099656f2acec50e3e2546ea633ad1bfd1c722e0c2b91eef1d609103d8abdc0a7cbaf'
            'd9d28e02e964704ea96645a5107f8b65cae5f4fb4f537e224e5e3d087fd296cb770c29ac76e0ce95d173bc420ea87fb8f187d616672a60a0cae618b0ef15b8c8'
            '02af4dd2a007e41db0c63822c8ab3b80b5d25646af1906dc85d0ad9bb8bbf5236f8e381d7f91cf99ed4b0978c50aee37cb9567cdeef65b7ec3d91b882852b1af'
            'b8fe56e14006ab866970ddbd501c054ae37186ddc065bb869cf7d18db8c0d455118d5bda3255fb66a0dde38b544655cfe9040ffe46e41d19830b47959b2fb168'
            '98ec26b61c30f3cf15dde3547e49ffb579aea06fd0dbd7bc54df97923dcc9be8e7904b83e95b9cd03918f2431ff454339500d13d831b552738af6c411a62bef1'
            'SKIP'
            'ccf18eb2c3d33a57871cbadd5ad825d2f2f489e69c54c7293b160abdc3e9e5c6a664ba7926a617d31affcf20b7ecb4e8de54fa78438c574aa1b257f686faade9'
            '69f13bb2e353727acbe39034978729272511c6578aa2faf8c829e1bb89c22e769262289b76d93254314304ebd7547c45cdc8ba6afc278444a8fd09f71dff9757'
            '47038a476ff90d7106e1ce2cf5dd3f2c356c75ab8cefc6901f8eddcbf7cd0f23c44f6ce96b2b3d57a6e3f30bdd5192cf3e75759277ab0ac6fbb179423f2431a0'
            '75513d1d6dfeb6425763dc8fe8d7f607ddd11d2a8397230333a4e556b303ceb7e68bfdb26d0a10f4b557ef13adbf54c3aab00f5b493772a94b5cd87d143663c4'
            '37df06631772200edc7e5a4450719155156a781e9a475383283627f6f1b8cbe94db6ba2e2fbc59107ea288846b56881b892e9b21d3d899b974fad4226c4def10'
            'eef5d8161edcc9817832de2000ad30320507a1e16fc321fb2b97dd2d159825b8f924cd29e5a4ffa29c339c8727f106730e6b6858c50d8afe7a5000629507badd'
            'b3aad9fd9292122fd3227f05d54742731bf4d6d57aaac680b34eca19597dfb56a7f54c7ad54f37cfc2ec7f622fbd90abe7f288f11f8eb98278ab07df32cf890a')
validpgpkeys=(
              '474402C8C582DAFBE389C427BCB7CF877E7D47A7' # Alexandre Oliva
              '6DB9C4B4F0D8C0DC432CF6E4227CA7C556B2BA78' # David P.
              '5ED9A48FC54C0A22D1D0804CEBC26CDB5A56DE73' # Steven Rostedt
)

_kernelname=${pkgbase#linux-libre}
_replacesarchkernel=("${_replacesarchkernel[@]/\%/${_kernelname}}")
_replacesoldkernels=("${_replacesoldkernels[@]/\%/${_kernelname}}")
_replacesoldmodules=("${_replacesoldmodules[@]/\%/${_kernelname}}")

case "${CARCH}" in
  i686|x86_64) KARCH=x86;;
  armv7h) KARCH=arm;;
esac

prepare() {
  cd ${_srcname}

  # add upstream patch
  if [ "${_pkgbasever}" != "${_pkgver}" ]; then
    patch -p1 -i "${srcdir}/patch-${_pkgbasever}-${_pkgver}"
  fi

  # add realtime patch
  patch -p1 -i "${srcdir}/patch-${_pkgver%-*}-${_rtpatchver}.patch"
  rm localversion-rt

  if [ "${CARCH}" = "armv7h" ]; then
    # RCN patch (CM3 firmware deblobbed, AUFS and RT removed)
    # Note: For stability reasons, AUFS and RT have been removed in the RCN patch.
    # We are supporting AUFS in linux-libre-pck through PCK patch and RT through its official
    # patch in linux-libre-rt. See https://wiki.parabola.nu/PCK for further details about PCK.
    git apply -v "${srcdir}/rcn-libre-${_pkgver%-*}-${rcnrel}.patch"

    # ALARM patches
    patch -p1 -i "${srcdir}/0001-ARM-atags-add-support-for-Marvell-s-u-boot.patch"
    patch -p1 -i "${srcdir}/0002-ARM-atags-fdt-retrieve-MAC-addresses-from-Marvell-bo.patch"
    patch -p1 -i "${srcdir}/0003-SMILE-Plug-device-tree-file.patch"
    patch -p1 -i "${srcdir}/0004-fix-mvsdio-eMMC-timing.patch"
    patch -p1 -i "${srcdir}/0005-net-smsc95xx-Allow-mac-address-to-be-set-as-a-parame.patch"
    patch -p1 -i "${srcdir}/0006-set-default-cubietruck-led-triggers.patch"
    patch -p1 -i "${srcdir}/0007-exynos4412-odroid-set-higher-minimum-buck2-regulator.patch"
  fi

  # add freedo as boot logo
  install -m644 -t drivers/video/logo \
    "${srcdir}/logo_linux_"{clut224.ppm,vga16.ppm,mono.pbm}

  # add latest fixes from stable queue, if needed
  # http://git.kernel.org/?p=linux/kernel/git/stable/stable-queue.git

  # set DEFAULT_CONSOLE_LOGLEVEL to 4 (same value as the 'quiet' kernel param)
  # remove this when a Kconfig knob is made available by upstream
  # (relevant patch sent upstream: https://lkml.org/lkml/2011/7/26/227)
  patch -p1 -i "${srcdir}/change-default-console-loglevel.patch"

  # maintain the TTY over USB disconnects
  # http://www.coreboot.org/EHCI_Gadget_Debug
  patch -p1 -i "${srcdir}/0001-usb-serial-gadget-no-TTY-hangup-on-USB-disconnect-WI.patch"

  # fix Atmel maXTouch touchscreen support
  # https://labs.parabola.nu/issues/877
  # http://www.fsfla.org/pipermail/linux-libre/2015-November/003202.html
  patch -p1 -i "${srcdir}/0002-fix-Atmel-maXTouch-touchscreen-support.patch"

  cp -Tf ../config.${CARCH} .config

  # append pkgrel to extraversion
  sed -ri "s|^(EXTRAVERSION =.*\S).*|\1-${pkgrel}|" Makefile

  # don't run depmod on 'make install'. We'll do this ourselves in packaging
  sed -i '2iexit 0' scripts/depmod.sh

  # get kernel version
  make prepare

  # load configuration
  # Configure the kernel. Replace the line below with one of your choice.
  #make menuconfig # CLI menu for configuration
  #make nconfig # new CLI menu for configuration
  #make xconfig # X-based configuration
  #make oldconfig # using old config from previous kernel version
  # ... or manually edit .config

  # rewrite configuration
  yes "" | make config >/dev/null
}

build() {
  cd ${_srcname}

  if [ "${CARCH}" = "armv7h" ]; then
    make ${MAKEFLAGS} LOCALVERSION= zImage modules dtbs
  elif [ "${CARCH}" = "x86_64" ] || [ "${CARCH}" = "i686" ]; then
    make ${MAKEFLAGS} LOCALVERSION= bzImage modules
  fi
}

_package() {
  pkgdesc="The ${pkgbase^} kernel and modules with realtime preemption"
  [ "${pkgbase}" = "linux-libre" ] && groups=('base' 'base-openrc')
  depends=('coreutils' 'linux-libre-firmware' 'kmod' 'mkinitcpio>=0.7')
  optdepends=('crda: to set the correct wireless channels of your country')
  provides=("${_replacesarchkernel[@]/%/=${_archpkgver}}" "LINUX-ABI_VERSION=${_archpkgver}")
  conflicts=("${_replacesarchkernel[@]}" "${_replacesoldkernels[@]}" "${_replacesoldmodules[@]}")
  replaces=("${_replacesarchkernel[@]}" "${_replacesoldkernels[@]}" "${_replacesoldmodules[@]}")
  backup=("etc/mkinitcpio.d/${pkgbase}.preset")
  install=linux.install

  cd ${_srcname}

  # get kernel version
  _kernver="$(make LOCALVERSION= kernelrelease)"
  _basekernel=${_kernver%%-*}
  _basekernel=${_basekernel%.*}

  mkdir -p "${pkgdir}"/{lib/modules,lib/firmware,boot}
  make LOCALVERSION= INSTALL_MOD_PATH="${pkgdir}" modules_install
  if [ "${CARCH}" = "armv7h" ]; then
    make LOCALVERSION= INSTALL_DTBS_PATH="${pkgdir}/boot/dtbs/${pkgbase}" dtbs_install
    cp arch/$KARCH/boot/zImage "${pkgdir}/boot/vmlinuz-${pkgbase}"
  elif [ "${CARCH}" = "x86_64" ] || [ "${CARCH}" = "i686" ]; then
    cp arch/$KARCH/boot/bzImage "${pkgdir}/boot/vmlinuz-${pkgbase}"
  fi

  # set correct depmod command for install
  sed -e "s|%PKGBASE%|${pkgbase}|g;s|%KERNVER%|${_kernver}|g" \
    "${startdir}/${install}" > "${startdir}/${install}.pkg"
  true && install=${install}.pkg

  # install mkinitcpio preset file for kernel
  if [ "${CARCH}" = "armv7h" ]; then
    sed "s|/boot/vmlinuz-%PKGBASE%|${_kernver}|g
         s|%PKGBASE%|${pkgbase}|g" ../linux.preset |
      install -Dm644 /dev/stdin "${pkgdir}/etc/mkinitcpio.d/${pkgbase}.preset"
  elif [ "${CARCH}" = "x86_64" ] || [ "${CARCH}" = "i686" ]; then
    sed "s|%PKGBASE%|${pkgbase}|g" ../linux.preset |
      install -Dm644 /dev/stdin "${pkgdir}/etc/mkinitcpio.d/${pkgbase}.preset"
  fi

  # install pacman hook for initramfs regeneration
  sed "s|%PKGBASE%|${pkgbase}|g" /90-linux.hook |
    install -Dm644 /dev/stdin "${pkgdir}/usr/share/libalpm/hooks/99-${pkgbase}.hook"

  # remove build and source links
  rm "${pkgdir}"/lib/modules/${_kernver}/{source,build}
  
  # remove the firmware
  rm -r "${pkgdir}/lib/firmware"
  
  # make room for external modules
  ln -s "../extramodules-${_basekernel}${_kernelname}" "${pkgdir}/lib/modules/${_kernver}/extramodules"
  
  # add real version for building modules and running depmod from post_install/upgrade
  echo "${_kernver}" |
    install -Dm644 /dev/stdin "${pkgdir}/lib/modules/extramodules-${_basekernel}${_kernelname}/version"

  # Now we call depmod...
  depmod -b "${pkgdir}" -F System.map "${_kernver}"

  # move module tree /lib -> /usr/lib
  mv -t "${pkgdir}/usr" "${pkgdir}/lib"

  if [ "${CARCH}" = "x86_64" ] || [ "${CARCH}" = "i686" ]; then
    # add vmlinux
    install -Dm644 vmlinux "${pkgdir}/usr/lib/modules/${_kernver}/build/vmlinux"
  fi
}

_package-headers() {
  pkgdesc="Header files and scripts for building modules for ${pkgbase^} kernel"
  provides=("${_replacesarchkernel[@]/%/-headers=${_archpkgver}}")
  conflicts=("${_replacesarchkernel[@]/%/-headers}" "${_replacesoldkernels[@]/%/-headers}")
  replaces=("${_replacesarchkernel[@]/%/-headers}" "${_replacesoldkernels[@]/%/-headers}")

  cd ${_srcname}
  local _builddir="${pkgdir}/usr/lib/modules/${_kernver}/build"

  install -Dt "${_builddir}" -m644 Makefile .config Module.symvers
  install -Dt "${_builddir}/kernel" -m644 kernel/Makefile

  mkdir "${_builddir}/.tmp_versions"

  cp -t "${_builddir}" -a include scripts

  install -Dt "${_builddir}/arch/${KARCH}" -m644 arch/${KARCH}/Makefile
  install -Dt "${_builddir}/arch/${KARCH}/kernel" -m644 arch/${KARCH}/kernel/asm-offsets.s

  if [[ ${CARCH} = i686 ]]; then
    install -t "${_builddir}/arch/${KARCH}" -m644 arch/${KARCH}/Makefile_32.cpu
  fi

  cp -t "${_builddir}/arch/${KARCH}" -a arch/${KARCH}/include

  install -Dt "${_builddir}/drivers/md" -m644 drivers/md/*.h
  install -Dt "${_builddir}/net/mac80211" -m644 net/mac80211/*.h

  # http://bugs.archlinux.org/task/9912
  install -Dt "${_builddir}/drivers/media/dvb-core" -m644 drivers/media/dvb-core/*.h
  
  # http://bugs.archlinux.org/task/13146
  install -Dt "${_builddir}/drivers/media/dvb-frontends" -m644 drivers/media/dvb-frontends/lgdt330x.h
  install -Dt "${_builddir}/drivers/media/i2c" -m644 drivers/media/i2c/msp3400-driver.h

  # http://bugs.archlinux.org/task/20402
  install -Dt "${_builddir}/drivers/media/usb/dvb-usb" -m644 drivers/media/usb/dvb-usb/*.h
  install -Dt "${_builddir}/drivers/media/dvb-frontends" -m644 drivers/media/dvb-frontends/*.h
  install -Dt "${_builddir}/drivers/media/tuners" -m644 drivers/media/tuners/*.h

  # add xfs and shmem for aufs building
  mkdir -p "${_builddir}"/{fs/xfs,mm}

  # copy in Kconfig files
  find . -name Kconfig\* -exec install -Dm644 {} "${_builddir}/{}" \;

  # add objtool for external module building and enabled VALIDATION_STACK option
  if [[ -e tools/objtools/objtool ]]; then
    install -Dt "${_builddir}/tools/objtool" tools/objtool/objtool
  fi

  # remove unneeded architectures
  local _arch
  for _arch in "${_builddir}"/arch/*/; do
    if [[ ${_arch} != */${KARCH}/ ]]; then
      rm -r "${_arch}"
    fi
  done

  # remove files already in linux-docs package
  rm -r "${_builddir}/Documentation"

  # Fix permissions
  chmod -R u=rwX,go=rX "${_builddir}"

  # strip scripts directory
  local _binary _strip
  while read -rd '' _binary; do
    case "$(file -bi "${_binary}")" in
      *application/x-sharedlib*)  _strip="${STRIP_SHARED}"   ;; # Libraries (.so)
      *application/x-archive*)    _strip="${STRIP_STATIC}"   ;; # Libraries (.a)
      *application/x-executable*) _strip="${STRIP_BINARIES}" ;; # Binaries
      *) continue ;;
    esac
    /usr/bin/strip ${_strip} "${_binary}"
  done < <(find "${_builddir}/scripts" -type f -perm -u+w -print0 2>/dev/null)
}

_package-docs() {
  pkgdesc="Kernel hackers manual - HTML documentation that comes with the ${pkgbase^} kernel"
  provides=("${_replacesarchkernel[@]/%/-docs=${_archpkgver}}")
  conflicts=("${_replacesarchkernel[@]/%/-docs}" "${_replacesoldkernels[@]/%/-docs}")
  replaces=("${_replacesarchkernel[@]/%/-docs}" "${_replacesoldkernels[@]/%/-docs}")

  cd ${_srcname}

  local _builddir="${pkgdir}/usr/lib/modules/${_kernver}/build"
  
  mkdir -p "${_builddir}"
  cp -t "${_builddir}" -a Documentation

  # Fix permissions
  chmod -R u=rwX,go=rX "${_builddir}"
}

pkgname=("${pkgbase}" "${pkgbase}-headers" "${pkgbase}-docs")
for _p in ${pkgname[@]}; do
  eval "package_${_p}() {
    $(declare -f "_package${_p#${pkgbase}}")
    _package${_p#${pkgbase}}
  }"
done

# vim:set ts=8 sts=2 sw=2 et: