#
# Core Packages for Chakra, part of chakraos.org
#

pkgbase=linux
pkgname=('linux' 'linux-headers' 'linux-docs') 
_kernelname=${pkgname#linux}
_basekernel="4.2"
pkgver=4.2.6
pkgrel=2
arch=('x86_64')
url="http://www.kernel.org/"
license=('GPL2')
makedepends=('xmlto' 'docbook-xsl' 'bc')
options=('!strip')
_aufsver=4.2
source=("http://www.kernel.org/pub/linux/kernel/v4.x/linux-${_basekernel}.tar.xz"
        "http://www.kernel.org/pub/linux/kernel/v4.x/patch-${pkgver}.xz"
        # the main kernel config files
        'config.x86_64'
        # standard config files for mkinitcpio ramdisk
        'linux.preset'
        'change-default-console-loglevel.patch'
        "git://github.com/sfjro/aufs4-standalone.git#branch=aufs${_aufsver}"
        'config.aufs'
        'overlay-multi-layer.patch'
        'CVE-2016-0728.patch'
        )
sha256sums=('cf20e044f17588d2a42c8f2a450b0fd84dfdbd579b489d93e9ab7d0e8b45dbeb'
            '419f91fa4a6bb0d2c160ef6812341e5aac7e776550efe1d0958ae3b1ce0ea8ce'
            '9bf18e4a0e6daef246e663853b4e61335c087cfe7c4482d69bbb6160d07b40d0'
            'f0d90e756f14533ee67afda280500511a62465b4f76adcc5effa95a40045179c'
            '1256b241cd477b265a3c2d64bdc19ffe3c9bbcee82ea3994c590c2c76e767d99'
            'SKIP'
            'dc48a541d34416272892df18dafea760717f0724b1fcded39f359655b131425f'
            '0f8c88a20b430208ef9ed5e9e744736857ea634abfb1eff9ef8dd9635d3f9eab'
            '03bed5b1c6ef34a917e218a46d38cd1347c5ab5693131996113c6cad275dc4e9')

prepare() {
  cd "${srcdir}/linux-${_basekernel}"

  # initial cleanup
  make mrproper

  # add upstream patch
  # msg "adding upstream patch"
  patch -p1 -i "${srcdir}/patch-${pkgver}"
  
  # fixes #47820 CVE-2016-0728.patch
  patch -Np1 -i "${srcdir}/CVE-2016-0728.patch"

  # 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"

  #aufs patches for Live:
  msg "starting aufs patches"
  cp -va "${srcdir}/aufs4-standalone/"{Documentation,fs} .
  cp -va "${srcdir}/aufs4-standalone/include/uapi/linux/aufs_type.h" ./include/uapi/linux
  msg "starting aufs patches: kbuild"
  patch -p1 -i "${srcdir}/aufs4-standalone/aufs4-kbuild.patch"
  msg "starting aufs patches: base"
  patch -p1 -i "${srcdir}/aufs4-standalone/aufs4-base.patch"
  msg "starting aufs patches: loopback"
  patch -p1 -i "${srcdir}/aufs4-standalone/aufs4-loopback.patch"
  msg "starting aufs patches: mmap"
  patch -p1 -i "${srcdir}/aufs4-standalone/aufs4-mmap.patch"
  msg "starting aufs patches: standalone"
  patch -p1 -i "${srcdir}/aufs4-standalone/aufs4-standalone.patch"

  #patch -p1 -i "${srcdir}/overlay-multi-layer.patch"

  cat "${srcdir}/config.x86_64" > ./.config

  cat "${srcdir}/config.aufs" >> ./.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 FIXME: let's try to break less stuff by NOT incrementing it this time
  # sed -ri "s|^(EXTRAVERSION =).*|\1 -${pkgrel}|" Makefile
  _todo='1'
  sed -ri "s|^(EXTRAVERSION =).*|\1 -${_todo}|" Makefile

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

  ####################
  # prepare
  ####################
  # 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

  # 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 "${srcdir}/linux-${_basekernel}"
  # build!
  make ${MAKEFLAGS} LOCALVERSION= bzImage modules
}

package_linux() {
  pkgdesc="The Linux Kernel and modules"
  groups=('base')
  depends=('coreutils' 'linux-firmware' 'kmod' 'mkinitcpio>=0.7')
  optdepends=('crda: to set the correct wireless channels of your country')
  provides=('nouveau-drm' 'acerhk=0.5.35' 'aufs3')
  conflicts=('nvidia-96xx=96.43.20-9' 'acerhk' 'tiacx')
  replaces=('nouveau-drm' 'aufs3')
  backup=("etc/mkinitcpio.d/${pkgname}.preset")
  install=linux.install

  cd "${srcdir}/linux-${_basekernel}"

  KARCH=x86

  # get kernel version
  _kernver="$(make LOCALVERSION= kernelrelease)"

  mkdir -p "${pkgdir}"/{lib/modules,lib/firmware,boot}
  make LOCALVERSION= INSTALL_MOD_PATH="${pkgdir}" modules_install
  cp arch/$KARCH/boot/bzImage "${pkgdir}/boot/vmlinuz-${pkgname}"

  # add vmlinux
  install -D -m644 vmlinux "${pkgdir}/usr/src/linux-${_kernver}/vmlinux"

  # install fallback mkinitcpio.conf file and preset file for kernel
  install -D -m644 "${srcdir}/linux.preset" "${pkgdir}/etc/mkinitcpio.d/linux.preset"

  # set correct depmod command for install
  sed \
    -e  "s/KERNEL_NAME=.*/KERNEL_NAME=${_kernelname}/" \
    -e  "s/KERNEL_VERSION=.*/KERNEL_VERSION=${_kernver}/" \
    -i "${startdir}/linux.install"
  sed \
    -e "1s|'linux.*'|'${pkgname}'|" \
    -e "s|ALL_kver=.*|ALL_kver=\"/boot/vmlinuz-${pkgname}\"|" \
    -e "s|default_image=.*|default_image=\"/boot/initramfs-${pkgname}.img\"|" \
    -e "s|fallback_image=.*|fallback_image=\"/boot/initramfs-${pkgname}-fallback.img\"|" \
    -i "${pkgdir}/etc/mkinitcpio.d/linux.preset"

  # remove build and source links
  rm -f "${pkgdir}"/lib/modules/${_kernver}/{source,build}
  # remove the firmware
  # we'll get it from the linux-firmware package and we don't want conflicts
  rm -rf "${pkgdir}/lib/firmware"
  # gzip -9 all modules to save 100MB of space
  find "${pkgdir}" -name '*.ko' -exec gzip -9 {} \;
  # make room for external modules
  ln -s "../extramodules-${_basekernel}${_kernelname:--CHAKRA}" "${pkgdir}/lib/modules/${_kernver}/extramodules"
  # add real version for building modules and running depmod from post_install/upgrade
  mkdir -p "${pkgdir}/lib/modules/extramodules-${_basekernel}${_kernelname:--CHAKRA}"
  echo "${_kernver}" > "${pkgdir}/lib/modules/extramodules-${_basekernel}${_kernelname:--CHAKRA}/version"
  
  # Now we call depmod...
  depmod -b "$pkgdir" -F System.map "$_kernver"

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

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

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

  cd "${pkgdir}/usr/lib/modules/${_kernver}"
  ln -sf ../../../src/linux-${_kernver} build

  cd "${srcdir}/linux-${_basekernel}"
  install -D -m644 Makefile \
    "${pkgdir}/usr/src/linux-${_kernver}/Makefile"
  install -D -m644 kernel/Makefile \
    "${pkgdir}/usr/src/linux-${_kernver}/kernel/Makefile"
  install -D -m644 .config \
    "${pkgdir}/usr/src/linux-${_kernver}/.config"

  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/include"

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

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

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

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

  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/arch/${KARCH}/kernel"

  cp arch/${KARCH}/Makefile "${pkgdir}/usr/src/linux-${_kernver}/arch/${KARCH}/"

  cp arch/${KARCH}/kernel/asm-offsets.s "${pkgdir}/usr/src/linux-${_kernver}/arch/${KARCH}/kernel/"

  # add headers for lirc package
  # pci
  for i in bt8xx cx88 saa7134; do
    mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/pci/${i}"
    cp -a drivers/media/pci/${i}/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/pci/${i}"
  done
  # usb
  # removed sn9c102 because it doesn't exist anymore?
  for i in cpia2 em28xx pwc ; do
    mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/usb/${i}"
    cp -a drivers/media/usb/${i}/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/usb/${i}"
  done
  # i2c
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/i2c"
  cp drivers/media/i2c/*.h  "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/i2c/"
  for i in cx25840; do
    mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/i2c/${i}"
    cp -a drivers/media/i2c/${i}/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/i2c/${i}"
  done

  # add docbook makefile
  install -D -m644 Documentation/DocBook/Makefile \
    "${pkgdir}/usr/src/linux-${_kernver}/Documentation/DocBook/Makefile"

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

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

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

  # add dvb headers for external modules
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb-core"
  cp drivers/media/dvb-core/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb-core/"
  # and...
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/include/config/dvb/"
  cp include/config/dvb/*.h "${pkgdir}/usr/src/linux-${_kernver}/include/config/dvb/"

  # add dvb headers for http://mcentral.de/hg/~mrec/em28xx-new
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb-frontends/"
  cp drivers/media/dvb-frontends/lgdt330x.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb-frontends/"
  cp drivers/media/i2c/msp3400-driver.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/i2c/"

  # add dvb headers
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/usb/dvb-usb"
  cp drivers/media/usb/dvb-usb/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/usb/dvb-usb/"
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb-frontends"
  cp drivers/media/dvb-frontends/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb-frontends/"
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/tuners"
  cp drivers/media/tuners/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/tuners/"

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

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

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

  # strip scripts directory
  find "${pkgdir}/usr/src/linux-${_kernver}/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 "${pkgdir}"/usr/src/linux-${_kernver}/arch/{alpha,arm,arm26,avr32,blackfin,c6x,cris,frv,h8300,hexagon,ia64,m32r,m68k,m68knommu,mips,microblaze,mn10300,openrisc,parisc,powerpc,ppc,s390,score,sh,sh64,sparc,sparc64,tile,unicore32,um,v850,xtensa}
}

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

  cd "${srcdir}/linux-${_basekernel}"

  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}"
  cp -al Documentation "${pkgdir}/usr/src/linux-${_kernver}"
  find "${pkgdir}" -type f -exec chmod 444 {} \;
  find "${pkgdir}" -type d -exec chmod 755 {} \;

  # remove a file already in linux package
  rm -f "${pkgdir}/usr/src/linux-${_kernver}/Documentation/DocBook/Makefile"
}