pkgbase=linux-lts
pkgname=('linux-lts' 'linux-lts-headers' 'linux-lts-docs')
pkgver=4.4.152
_srcname=linux-4.4
pkgrel=4
makedepends=('xmlto' 'docbook-xsl' 'kmod' 'inetutils' 'bc')
arch=('x86_64')
license=('GPL2')
url="http://www.kernel.org"
options=('!strip')
source=(http://www.kernel.org/pub/linux/kernel/v4.x/${_srcname}.tar.{xz,sign}
        http://www.kernel.org/pub/linux/kernel/v4.x/patch-${pkgver}.xz
        # the main kernel config files
        config.x86_64
        # standard config files for mkinitcpio ramdisk
        linux-lts.preset
        60-linux.hook  # pacman hook for depmod
        90-linux.hook  # pacman hook for initramfs regeneration
        change-default-console-loglevel.patch)
md5sums=('9a78fa2eb6c68ca5a40ed5af08142599'
         'SKIP'
         '008bb66a9c04de08d95056688f6fc666'
         '3c82e548b482a80cb344c083a9e4e259'
         'a329f9581060d555dc7358483de9760a'
         'ce6c81ad1ad1f8b333fd6077d47abdaf'
         'a85bfae59eb537b973c388ffadb281ff'
         'df7fceae6ee5d7e7be7b60ecd7f6bb35')
validpgpkeys=(
              'ABAF11C65A2970B130ABE3C479BE3E4300411886' # Linus Torvalds
              '647F28654894E3BD457199BE38DBBDC86092693E' # Greg Kroah-Hartman
             )

_kernelname=-CHAKRA-LTS
             
prepare() {
  cd ${srcdir}/$_srcname

  # add upstream patch
  msg "adding upstream patch"
  patch -p1 -i "${srcdir}/patch-${pkgver}"
  
  # 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)
  msg "changing default console loglevel"
  patch -p1 -i "${srcdir}/change-default-console-loglevel.patch"

  # replace the config file with the x86_64 configurations
  cat "${srcdir}/config.x86_64" > ./.config

  if [ "${_kernelname}" != "" ]; then
    sed -i "s|CONFIG_LOCALVERSION=.*|CONFIG_LOCALVERSION=\"${_kernelname}\"|g" ./.config
    sed -i "s|CONFIG_LOCALVERSION_AUTO=.*|CONFIG_LOCALVERSION_AUTO=n|" ./.config
  fi

  # set extraversion to pkgrel
  sed -ri "s|^(EXTRAVERSION =).*|\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
  make -s kernelrelease > ../version

  # 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

  # save configuration for later reuse
  cat .config > "${startdir}/config.x86_64.last"

  ####################
  # stop here
  # this is useful to configure the kernel
  #msg "Stopping build"
  #return 1
  ####################
}

build() {
  cd ${srcdir}/$_srcname

  make ${MAKEFLAGS} LOCALVERSION= bzImage modules
}

package_linux-lts() {
  pkgdesc="The Linux LTS-Kernel and modules"
  groups=('lts')
  depends=('coreutils' 'linux-firmware' 'kmod' 'mkinitcpio')
  optdepends=('crda: to set the correct wireless channels of your country')
  replaces=('linux-scsi'
            'squashfs' 'unionfs' 'ivtv'
            'zd1211' 'kvm-modules' 'iwlwifi' 'rt2x00-cvs'
            'gspcav1' 'atl2' 'wlan-ng26' 'rt2500'
            'aufs3' 'nouveau-drm')
  provides=("aufs3=$_aufs" 'nouveau-drm-lts' 'acerhk-lts=0.5.35')
  conflicts=('acerhk-lts')
  backup=("etc/mkinitcpio.d/${pkgbase}.preset")
  install=${pkgname}.install


  local kernver="$(<version)"
  
  cd ${_srcname}

  msg2 "Installing boot image..."
  install -Dm644 "$(make -s image_name)" "$pkgdir/boot/vmlinuz-$pkgbase"

  msg2 "Installing modules..."
  local modulesdir="$pkgdir/usr/lib/modules/$kernver"
  mkdir -p "$modulesdir"
  make INSTALL_MOD_PATH="$pkgdir/usr" DEPMOD=/doesnt/exist modules_install

  # a place for external modules,
  # with version file for building modules and running depmod from hook
  local extramodules="extramodules$_kernelname"
  local extradir="$pkgdir/usr/lib/modules/$extramodules"
  install -Dt "$extradir" -m644 ../version
  ln -sr "$extradir" "$modulesdir/extramodules"

  # remove build and source links
  rm "$modulesdir"/{source,build}
  # remove the firmware
  rm -rf "${pkgdir}/usr/lib/firmware"

  msg2 "Running depmod..."
  depmod -b "${pkgdir}/usr" -F System.map "${kernver}"

  msg2 "Installing hooks..."

  # sed expression for following substitutions
  local subst="
    s|%PKGBASE%|$pkgbase|g
    s|%KERNVER%|$kernver|g
    s|%EXTRAMODULES%|$extramodules|g
  "

  # hack to allow specifying an initially nonexisting install file
  sed "$subst" "$startdir/$install" > "$startdir/$install.pkg"
  true && install=$install.pkg

  # fill in mkinitcpio preset and pacman hooks
  sed "$subst" ../linux-lts.preset | install -Dm644 /dev/stdin \
    "$pkgdir/etc/mkinitcpio.d/$pkgbase.preset"
  sed "$subst" ../60-linux.hook | install -Dm644 /dev/stdin \
    "$pkgdir/usr/share/libalpm/hooks/60-$pkgbase.hook"
  sed "$subst" ../90-linux.hook | install -Dm644 /dev/stdin \
    "$pkgdir/usr/share/libalpm/hooks/90-$pkgbase.hook"

  msg2 "Fixing permissions..."
  chmod -Rc u=rwX,go=rX "$pkgdir"
}

package_linux-lts-headers() {
  pkgdesc="Header files and scripts for building modules for linux lts-kernel"

  local builddir="$pkgdir/usr/lib/modules/$(<version)/build"
  
  install -dm755 "${pkgdir}/usr/lib/modules/${_kernver}"

  cd ${_srcname}
  
  msg2 "Installing build files..."
  install -Dt "$builddir" -m644 Makefile .config Module.symvers System.map vmlinux
  install -Dt "$builddir/kernel" -m644 kernel/Makefile
  install -Dt "$builddir/arch/x86" -m644 arch/x86/Makefile
  cp -t "$builddir" -a scripts
  
  # add xfs and shmem for aufs building
  mkdir -p "$builddir"/{fs/xfs,mm}

  # ???
  mkdir "$builddir/.tmp_versions"
  
  msg2 "Installing headers..."
  cp -t "$builddir" -a include
  cp -t "$builddir/arch/x86" -a arch/x86/include
  install -Dt "$builddir/arch/x86/kernel" -m644 arch/x86/kernel/asm-offsets.s

  # add dm headers
  install -Dt "$builddir/drivers/md" -m644 drivers/md/*.h

  # add inotify.h
  install -Dt "$builddir/include/linux/inotify" -m644 include/linux/inotify.h

  # add wireless headers
  install -Dt "$builddir/net/mac80211" -m644 net/mac80211/*.h

  # add dvb headers for external modules
  install -Dt "$builddir/drivers/media/dvb-core" -m644 drivers/media/dvb-core/*.h
  install -Dt "$builddir/include/config/dvb" -m644 include/config/dvb/*.h
    
  # http://bugs.archlinux.org/task/13146
  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

  msg2 "Installing KConfig files..."
  find . -name 'Kconfig*' -exec install -Dm644 {} "$builddir/{}" \;

  msg2 "Removing unneeded architectures..."
  local arch
  for arch in "$builddir"/arch/*/; do
    [[ $arch = */x86/ ]] && continue
    echo "Removing $(basename "$arch")"
    rm -r "$arch"
  done

  msg2 "Removing documentation..."
  rm -r "$builddir/Documentation"

  msg2 "Removing broken symlinks..."
  find -L "$builddir" -type l -printf 'Removing %P\n' -delete

  msg2 "Removing loose objects..."
  find "$builddir" -type f -name '*.o' -printf 'Removing %P\n' -delete

  msg2 "Stripping build tools..."
  local file
  while read -rd '' file; do
    case "$(file -bi "$file")" in
      application/x-sharedlib\;*)      # Libraries (.so)
        strip -v $STRIP_SHARED "$file" ;;
      application/x-archive\;*)        # Libraries (.a)
        strip -v $STRIP_STATIC "$file" ;;
      application/x-executable\;*)     # Binaries
        strip -v $STRIP_BINARIES "$file" ;;
      application/x-pie-executable\;*) # Relocatable binaries
        strip -v $STRIP_SHARED "$file" ;;
    esac
  done < <(find "$builddir" -type f -perm -u+x ! -name vmlinux -print0)

  msg2 "Fixing permissions..."
  chmod -Rc u=rwX,go=rX "$pkgdir"
}

package_linux-lts-docs() {
  pkgdesc="Kernel hackers manual - HTML documentation that comes with the Linux lts-kernel."

  local builddir="$pkgdir/usr/lib/modules/$(<version)/build"

  cd "${srcdir}/$_srcname"

  msg2 "Installing documentation..."
  mkdir -p "$builddir"
  cp -t "$builddir" -a Documentation

  msg2 "Fixing permissions..."
  chmod -Rc u=rwX,go=rX "$pkgdir"
}