# Maintainer: Timofonic timofonic at gmail.com
# Contributor: Boohbah <boohbah at gmail.com>
# Contributor: Tobias Powalowski <tpowa@archlinux.org>
# Contributor: Thomas Baechler <thomas@archlinux.org>
# Contributor: Jonathan Chan <jyc@fastmail.fm>
# Contributor: misc <tastky@gmail.com>
# Contributor: NextHendrix <cjones12 at sheffield.ac.uk>

### BUILD OPTIONS
# Set these variables to ANYTHING that is not null to enable them

# Use specific config file
_makefileconfig=

# Location of the custom kernel config file
_fileconfig=

# Tweak kernel options prior to a build via nconfig
_makenconfig=

# Tweak kernel options prior to a build via xconfig
_makexconfig=

# Tweak kernel options prior to a build via gconfig
_makegconfig=

# NUMA is optimized for multi-socket motherboards. A single multi-core CPU can
# actually run slower with NUMA enabled. Most users will want to set this option
# to enabled ... in other words, do not use NUMA on a single CPU system.
#
# See, https://bugs.archlinux.org/task/31187
_NUMAdisable=y

# Compile ONLY probed modules
# As of mainline 2.6.32, running with this option will only build the modules
# that you currently have probed in your system VASTLY reducing the number of
# modules built and the build time to do it.
#
# WARNING - ALL modules must be probed BEFORE you begin making the pkg!
#
# To keep track of which modules are needed for your specific system/hardware,
# give module_db script a try: https://aur.archlinux.org/packages/modprobed-db
# This PKGBUILD will call it directly to probe all the modules you have logged!
#
# More at this wiki page ---> https://wiki.archlinux.org/index.php/Modprobed-db
_localmodcfg=

# Use the current kernel's .config file
# Enabling this option will use the .config of the RUNNING kernel rather than
# the ARCH defaults. Useful when the package gets updated and you already went
# through the trouble of customizing your config options.  NOT recommended when
# a new kernel is released, but again, convenient for package bumps.
_use_current=



pkgbase=linux-drm-tip-git
pkgname=('linux-drm-tip-git' 'linux-drm-tip-headers-git')
pkgver=r662284.035f22af3e97

# Alternative idea. Is this OK?

#pkgver="$(
#{  cd "${_gitname}"
#  printf "r%s.%s" "$(git rev-list --count HEAD)" "$(git rev-parse --short HEAD)"}
#)"

# Or...

#pkgver= {
#  cd "${_gitname}"
#  printf "r%s.%s" "$(git rev-list --count HEAD)" "$(git rev-parse --short HEAD)"
#}

pkgrel=1
arch=('i686' 'x86_64')
url="http://www.kernel.org/"
license=('GPL2')
# Is it ok to remove these packages? Is it ok to not provide docs?
makedepends=( 'kmod' 'inetutils' 'bc' 'git' 'libelf') # Removed: 'xmlto' 'docbook-xsl'
options=('!strip')
_gcc_patch='enable_additional_cpu_optimizations_for_gcc_v4.9+_kernel_v3.15+.patch'
source=('git+https://anongit.freedesktop.org/git/drm-tip.git'
        # Patches. Not needed as they are used to download a vanilla version and apply 
        # patches instead downloading newer tarballs. Here we use Git
        #"https://www.kernel.org/pub/linux/kernel/v4.x/patch-${kernelver}.xz"
        #"https://www.kernel.org/pub/linux/kernel/v4.x/patch-${kernelver}.sign"

        # the main kernel config files
        'config.i686' 'config.x86_64'
        # pacman hook for initramfs regeneration
        '90-linux.hook'
        # standard config files for mkinitcpio ramdisk
        "${pkgbase}.preset")
sha256sums=('SKIP'
            'df55887a43dcbb6bd35fd2fb1ec841427b6ea827334c0880cbc256d4f042a7a1'
            'bf84528c592d1841bba0662242f0339a24a1de384c31f28248631e8be9446586'
            '834bd254b56ab71d73f59b3221f056c72f559553c04718e350ab2a3e2991afe0'
            'ad6344badc91ad0630caacde83f7f9b97276f80d26a20619a87952be65492c65')
_gitname=drm-tip



_kernelname=${pkgbase#linux}

# no tags in drm-tip
#pkgver() {
#  cd "${_gitname}"
#
#  git describe --long | sed -E 's/^v//;s/([^-]*-g)/r\1/;s/-/./g;s/\.rc/rc/'
#}

pkgver() {
  cd "${_gitname}"
  printf "r%s.%s" "$(git rev-list --count HEAD)" "$(git rev-parse --short HEAD)"
}

#What about using this instead?
# pkgver() {
#    cd "$srcdir/$_gitname"
#    git describe --always | sed -r 's/^v//;s/-/./g;'
#}


prepare() {
  cd "$srcdir/$_gitname"

  # add upstream patch
  # Not required as we use Git
  # patch -p1 -i "${srcdir}/patch-${_kernelver}"

  # security patches

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

  # Patch source to unlock additional gcc CPU optimizatons
  # https://github.com/graysky2/kernel_gcc_patch
  patch -Np1 -i "$srcdir/$_gitname/$_gcc_patch"
         
  # Is this okay?
  cat "$srcdir/$_gitname/config.${CARCH}" > ./.config #look -> Does this cause issues about custom config?

  # set localversion to git commit
  if [ "${_kernelname}" != "" ]; then
    sed -i "s|CONFIG_LOCALVERSION=.*|CONFIG_LOCALVERSION=\"${pkgver##*.}\"|g" ./.config
    sed -i "s|CONFIG_LOCALVERSION_AUTO=.*|CONFIG_LOCALVERSION_AUTO=n|" ./.config
  fi

  ### Optionally disable NUMA for 64-bit kernels only
  # (x86 kernels do not support NUMA)
  if [ -n "$_NUMAdisable" ]; then
    if [ "${CARCH}" = "x86_64" ]; then
      msg "Disabling NUMA from kernel config..."
      sed -i -e 's/CONFIG_NUMA=y/# CONFIG_NUMA is not set/' \
        -i -e '/CONFIG_AMD_NUMA=y/d' \
        -i -e '/CONFIG_X86_64_ACPI_NUMA=y/d' \
        -i -e '/CONFIG_NODES_SPAN_OTHER_NODES=y/d' \
        -i -e '/# CONFIG_NUMA_EMU is not set/d' \
        -i -e '/CONFIG_NODES_SHIFT=6/d' \
        -i -e '/CONFIG_NEED_MULTIPLE_NODES=y/d' \
        -i -e '/# CONFIG_MOVABLE_NODE is not set/d' \
        -i -e '/CONFIG_USE_PERCPU_NUMA_NODE_ID=y/d' \
        -i -e '/CONFIG_ACPI_NUMA=y/d' ./.config
      fi
    fi

  ### Optionally use running kernel's config
  # code originally by nous; http://aur.archlinux.org/packages.php?ID=40191
  if [ -n "$_use_current" ]; then
    if [[ -s /proc/config.gz ]]; then
      msg "Extracting config from /proc/config.gz..."
      # modprobe configs
      zcat /proc/config.gz > ./.config
    else
      warning "Your kernel was not compiled with IKCONFIG_PROC!"
      warning "You cannot read the current config!"
      warning "Aborting!"
      exit
    fi
  fi                                

  ### Optionally use a custom kernel's config file
  # code originally by nous; http://aur.archlinux.org/packages.php?ID=40191
  if [ -n "$_makefileconfig" ]; then #look
    if [[ $_fileconfig ]]; then #look
      msg "Reading and copying config from $_fileconfig"
      # modprobe configs
      cat $_fileconfig > ./.config #look
    else
      warning "The $_fileconfig kernel custom config file is not available!"
      warning "Please make sure you have the kernel custom config file in the specified location!"
      warning "Aborting!"
      exit
    fi
  fi

                                                              

#Old old old

#  if [ "${CARCH}" = "x86_64" ]; then
#    cat "${srcdir}/config.x86_64" > ./.config
#  else
#    cat "${srcdir}/config" > ./.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

  ### Optionally load needed modules for the make localmodconfig
  # See https://aur.archlinux.org/packages/modprobed-db
    if [ -n "$_localmodcfg" ]; then
    msg "If you have modprobed-db installed, running it in recall mode now"
    if [ -e /usr/bin/modprobed-db ]; then
      [[ -x /usr/bin/sudo ]] || {
      echo "Cannot call modprobe with sudo. Install sudo and configure it to work with this user."
      exit 1; }
      sudo /usr/bin/modprobed-db recall
    fi
    msg "Running Steven Rostedt's make localmodconfig now"
    make localmodconfig
  fi

  [[ -z "$_makenconfig" ]] || make nconfig

  # How to add $_makexconfig ?
  # [[ -z "$_makexconfig" ]] || make xconfig #look

  # How to add $_makegconfig ?
  # [[ -z "$_makegconfig" ]] || make gconfig #look
            

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

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

build() {
  cd "$srcdir/$_gitname"
  make ${MAKEFLAGS} LOCALVERSION= bzImage modules
}

package_linux-drm-tip-git() {
  pkgdesc="The Linux kernel and modules with Intel DRM current development and nightly trees (git version). May be useful to check Intel graphics driver 
  bugs/issues 
  against stable version or being more bleeding edge"
  depends=('coreutils' 'linux-firmware' 'kmod' 'mkinitcpio>=0.7')
  optdepends=('crda: to set the correct wireless channels of your country')
  provides=('linux')
  backup=("etc/mkinitcpio.d/$pkgbase.preset")
  install=linux.install

  cd "$srcdir/$_gitname"

  KARCH=x86

  # 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
  cp arch/$KARCH/boot/bzImage "$pkgdir/boot/vmlinuz-${pkgbase}"

  # set correct depmod command for install


# Use this new stuff from upstream or the older one?
  sed -e "s|%PKGBASE%|${pkgbase}|g;s|%KERNVER%|${_kernver}|g" \
    "${startdir}/${install}" > "${startdir}/${install}.pkg"
  true && install=${install}.pkg

# Older stuff

#  cp -f "${startdir}/${install}" "${startdir}/${install}.pkg"
#  true && install=${install}.pkg
#  sed \
#    -e  "s/KERNEL_NAME=.*/KERNEL_NAME=${_kernelname}/" \
#    -e  "s/KERNEL_VERSION=.*/KERNEL_VERSION=${_kernver}/" \
#    -i "${startdir}/${install}"
    


  # install mkinitcpio preset file for kernel
  
    sed "s|%PKGBASE%|${pkgbase}|g" "$srcdir/$pkgbase.preset" |
    install -D -m644 /dev/stdin "$pkgdir/etc/mkinitcpio.d/$pkgbase.preset"

# Older code. I put here because of idk and as reference.

#  install -D -m644 "${srcdir}/${pkgbase}.preset" "${pkgdir}/etc/mkinitcpio.d/${pkgbase}.preset"
#  sed \
#    -e "1s|'linux.*'|'${pkgbase}'|" \
#    -e "s|ALL_kver=.*|ALL_kver=\"/boot/vmlinuz-${pkgbase}\"|" \
#    -e "s|default_image=.*|default_image=\"/boot/initramfs-${pkgbase}.img\"|" \
#    -e "s|fallback_image=.*|fallback_image=\"/boot/initramfs-${pkgbase}-fallback.img\"|" \
#    -i "${pkgdir}/etc/mkinitcpio.d/${pkgbase}.preset"

 # install pacman hook for initramfs regeneration
  sed "s|%PKGBASE%|${pkgbase}|g" "${srcdir}/90-linux.hook" |
    install -D -m644 /dev/stdin "$pkgdir/usr/share/libalpm/hooks/90-$pkgbase.hook"

  # remove build and source links
  rm -f "$pkgdir"/lib/modules/${_kernver}/{source,build}
  
  # remove the firmware
  rm -rf "$pkgdir/lib/firmware"
  
  # make room for external modules
  ln -s "../extramodules-${_basekernel}${_kernelname:--ARCH}" "${pkgdir}/lib/modules/${_kernver}/extramodules"
  
  # add real version for building modules and running depmod from post_install/upgrade
  mkdir -p "$pkgdir/lib/modules/extramodules-${_basekernel}${_kernelname:--ARCH}" #look
  echo "${_kernver}" > "$pkgdir/lib/modules/extramodules-${_basekernel}${_kernelname:--ARCH}/version" #look

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

  # move module tree /lib -> /usr/lib
  mkdir -p "$pkgdir/usr"
  mv "$pkgdir/lib" "$pkgdir/usr/"

  # add vmlinux
  install -D -m644 vmlinux "$pkgdir/usr/lib/modules/${_kernver}/build/vmlinux" 

  # New core linux PKGBUILD lacks this. Remove?
  # add System.map
 # install -D -m644 System.map "$pkgdir/boot/System.map-${_kernver}"
}

package_linux-drm-tip-headers-git()
  pkgdesc="Header files and scripts for building modules for Linux kernel and modules with DRM current development and nightly trees (git version). May be useful to check graphics driver bugs/issues against stable version or being more bleeding edge"
   
  provides=('linux-headers')

  install -dm755 "$pkgdir/usr/lib/modules/${_kernver}"

  cd "${_gitname}"
  install -D -m644 Makefile \
    "$pkgdir/usr/lib/modules/${_kernver}/build/Makefile"
  install -D -m644 kernel/Makefile \
    "$pkgdir/usr/lib/modules/${_kernver}/build/kernel/Makefile"
  install -D -m644 .config \
    "$pkgdir/usr/lib/modules/${_kernver}/build/.config"

  mkdir -p "$pkgdir/usr/lib/modules/${_kernver}/build/include"

  for i in acpi asm-generic config crypto drm generated keys linux math-emu \
    media net pcmcia rdma scsi soc sound trace uapi video xen; do
    cp -a include/${i} "$pkgdir/usr/lib/modules/${_kernver}/build/include/"
  done

  # copy arch includes for external modules
  mkdir -p "$pkgdir/usr/lib/modules/${_kernver}/build/arch/x86"
  cp -a arch/x86/include "$pkgdir/usr/lib/modules/${_kernver}/build/arch/x86/"

  # copy files necessary for later builds, like nvidia and vmware
  cp Module.symvers "$pkgdir/usr/lib/modules/${_kernver}/build"
  cp -a scripts "$pkgdir/usr/lib/modules/${_kernver}/build"

  # fix permissions on scripts dir
  chmod og-w -R "$pkgdir/usr/lib/modules/${_kernver}/build/scripts"
  mkdir -p "$pkgdir/usr/lib/modules/${_kernver}/build/.tmp_versions"

  mkdir -p "$pkgdir/usr/lib/modules/${_kernver}/build/arch/${KARCH}/kernel"

  cp arch/${KARCH}/Makefile "$pkgdir/usr/lib/modules/${_kernver}/build/arch/${KARCH}/"

  if [ "${CARCH}" = "i686" ]; then
    cp arch/${KARCH}/Makefile_32.cpu "$pkgdir/usr/lib/modules/${_kernver}/build/arch/${KARCH}/"
  fi

  cp arch/${KARCH}/kernel/asm-offsets.s "$pkgdir/usr/lib/modules/${_kernver}/build/arch/${KARCH}/kernel/"

  # add docbook makefile
  # Workaround to make it build
 # install -D -m644 Documentation/DocBook/Makefile \
 #    "$pkgdir/usr/lib/modules/${_kernver}/build/Documentation/DocBook/Makefile"

  # add dm headers
  mkdir -p "$pkgdir/usr/lib/modules/${_kernver}/build/drivers/md"
  cp drivers/md/*.h "$pkgdir/usr/lib/modules/${_kernver}/build/drivers/md"

  # add inotify.h
  mkdir -p "$pkgdir/usr/lib/modules/${_kernver}/build/include/linux"
  cp include/linux/inotify.h "$pkgdir/usr/lib/modules/${_kernver}/build/include/linux/"

  # add wireless headers
  mkdir -p "$pkgdir/usr/lib/modules/${_kernver}/build/net/mac80211/"
  cp net/mac80211/*.h "$pkgdir/usr/lib/modules/${_kernver}/build/net/mac80211/"

  # add dvb headers for external modules
  # in reference to:
  # http://bugs.archlinux.org/task/9912
  mkdir -p "$pkgdir/usr/lib/modules/${_kernver}/build/drivers/media/dvb-core"
  cp drivers/media/dvb-core/*.h "$pkgdir/usr/lib/modules/${_kernver}/build/drivers/media/dvb-core/"
  # and...
  # http://bugs.archlinux.org/task/11194
  mkdir -p "$pkgdir/usr/lib/modules/${_kernver}/build/include/config/dvb/"
  cp include/config/dvb/*.h "$pkgdir/usr/lib/modules/${_kernver}/build/include/config/dvb/"

  # add dvb headers for http://mcentral.de/hg/~mrec/em28xx-new
  # in reference to:
  # http://bugs.archlinux.org/task/13146
  mkdir -p "$pkgdir/usr/lib/modules/${_kernver}/build/drivers/media/dvb-frontends/"
  cp drivers/media/dvb-frontends/lgdt330x.h "$pkgdir/usr/lib/modules/${_kernver}/build/drivers/media/dvb-frontends/"
  mkdir -p "$pkgdir/usr/lib/modules/${_kernver}/build/drivers/media/i2c/"
  cp drivers/media/i2c/msp3400-driver.h "$pkgdir/usr/lib/modules/${_kernver}/build/drivers/media/i2c/"

  # add dvb headers
  # in reference to:
  # http://bugs.archlinux.org/task/20402
  mkdir -p "$pkgdir/usr/lib/modules/${_kernver}/build/drivers/media/usb/dvb-usb"
  cp drivers/media/usb/dvb-usb/*.h "$pkgdir/usr/lib/modules/${_kernver}/build/drivers/media/usb/dvb-usb/"
  mkdir -p "$pkgdir/usr/lib/modules/${_kernver}/build/drivers/media/dvb-frontends"
  cp drivers/media/dvb-frontends/*.h "$pkgdir/usr/lib/modules/${_kernver}/build/drivers/media/dvb-frontends/"
  mkdir -p "$pkgdir/usr/lib/modules/${_kernver}/build/drivers/media/tuners"
  cp drivers/media/tuners/*.h "$pkgdir/usr/lib/modules/${_kernver}/build/drivers/media/tuners/"

  # add xfs and shmem for aufs building
  mkdir -p "$pkgdir/usr/lib/modules/${_kernver}/build/fs/xfs"
  mkdir -p "$pkgdir/usr/lib/modules/${_kernver}/build/mm"
  # removed in 3.17 series
  # cp fs/xfs/xfs_sb.h "$pkgdir/usr/lib/modules/${_kernver}/build/fs/xfs/xfs_sb.h"

  # copy in Kconfig files
  for i in $(find . -name "Kconfig*"); do
    mkdir -p "$pkgdir"/usr/lib/modules/${_kernver}/build/`echo ${i} | sed 's|/Kconfig.*||'` #look
    cp ${i} "$pkgdir/usr/lib/modules/${_kernver}/build/${i}"
  done

  # Fix file conflict with -doc package
  rm "$pkgdir/usr/lib/modules/${_kernver}/build/Documentation/kbuild"/Kconfig.*-*

  # add objtool for external module building and enabled VALIDATION_STACK option
  if [ -f tools/objtool/objtool ];  then
      mkdir -p "$pkgdir/usr/lib/modules/${_kernver}/build/tools/objtool"
      cp -a tools/objtool/objtool $pkgdir/usr/lib/modules/${_kernver}/build/tools/objtool
  fi

  chown -R root.root "$pkgdir/usr/lib/modules/${_kernver}/build"
  find "$pkgdir/usr/lib/modules/${_kernver}/build" -type d -exec chmod 755 {} \;

  # strip scripts directory
  find "$pkgdir/usr/lib/modules/${_kernver}/build/scripts" -type f -perm -u+w 2>/dev/null | while read binary ; do
    case "$(file -bi "${binary}")" in
      *application/x-sharedlib*) # Libraries (.so)
        /usr/bin/strip ${STRIP_SHARED} "${binary}";;
      *application/x-archive*) # Libraries (.a)
        /usr/bin/strip ${STRIP_STATIC} "${binary}";;
      *application/x-executable*) # Binaries
        /usr/bin/strip ${STRIP_BINARIES} "${binary}";;
    esac
  done

  # remove unneeded architectures
  rm -rf "$pkgdir"/usr/lib/modules/${_kernver}/build/arch/{alpha,arc,arm,arm26,arm64,avr32,blackfin,c6x,cris,frv,h8300,hexagon,ia64,m32r,m68k,m68knommu,metag,mips,microblaze,mn10300,openrisc,parisc,powerpc,ppc,s390,score,sh,sh64,sparc,sparc64,tile,unicore32,um,v850,xtensa}
}

#Massive dirty workaround to avoid all possible errors
#_package-docs() {
#  pkgdesc="Kernel hackers manual - HTML documentation that comes with the Linux kernel (git version)"
#  provides=('linux-docs')

#  cd "${_gitname}"

#  mkdir -p "$pkgdir/usr/lib/modules/${_kernver}/build"
# Workaround to make it build
#  cp -al Documentation "${pkgdir}/usr/lib/modules/${_kernver}/build"
#  find "$pkgdir" -type f -exec chmod 444 {} \;
#  find "$pkgdir" -type d -exec chmod 755 {} \;

  # remove a file already in linux package
  # Workaround to make it build
  # rm -f "$pkgdir/usr/lib/modules/${_kernver}/build/Documentation/DocBook/Makefile"

  # Remove files already in linux-docs package
  # rm -f "$pkgdir/usr/lib/modules/${_kernver}/build/Documentation/kbuild/Kconfig.recursion
  # rm -f "$pkgdir/usr/lib/modules/${_kernver}/build/Documentation/kbuild/Kconfig.recursion
  # rm -f "$pkgdir/usr/lib/modules/${_kernver}/build/Documentation/kbuild/Kconfig.select-br
  #}

#pkgname=("${pkgbase}" "${pkgbase}-headers") # "${pkgbase}-docs") # Workaround to make it build
#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:
# nano rulez