#!/bin/bash

# Copyright 2013, 2016, 2017, 2018, 2019  Patrick J. Volkerding, Sebeka, Minnesota, USA
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# Modified 2016 by Eric Hameleers <alien@slackware.com> for Slackware Live Edition.

# Included in Slint by Didier Spaier <didier~at~slint~dot~fr>

cd $(dirname $0) ; CWD=$(pwd)

PKGNAM=grub
PKGVER=2.06
BUILD=1slint

# Automatically determine the architecture we're building on:
if [ -z "$ARCH" ]; then
  case "$(uname -m)" in
    i?86) ARCH=i586 ;;
    arm*) readelf /usr/bin/file -A | egrep -q "Tag_CPU.*[4,5]" && ARCH=arm || ARCH=armv7hl ;;
    # Unless $ARCH is already set, use uname -m for all other archs:
    *) ARCH=$(uname -m) ;;
  esac
  export ARCH
fi

# If the variable PRINT_PACKAGE_NAME is set, then this script will report what
# the name of the created package would be, and then exit. This information
# could be useful to other scripts.
if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PKGNAM-$PKGVER-$ARCH-$BUILD.txz"
  exit 0
fi

NUMJOBS=${NUMJOBS:-" -j$(expr $(nproc) + 1) "}

if [ "$ARCH" = "i386" ]; then
  SLKCFLAGS="-march=i386 -mcpu=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i486" ]; then
  SLKCFLAGS="-march=i486 -mtune=i686"
  EFI32_FLAGS=" --with-platform=efi --target=i386 --program-prefix= "
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-march=i586 -mtune=i686"
  EFI32_FLAGS=" --with-platform=efi --target=i386 --program-prefix= "
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-march=i686"
  EFI32_FLAGS=" --with-platform=efi --target=i386 --program-prefix= "
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "s390" ]; then
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  EFI32_FLAGS=" --with-platform=efi --target=i386 --program-prefix= "
  EFI_FLAGS=" --with-platform=efi --target=x86_64 --program-prefix= "
  LIBDIRSUFFIX="64"
elif [ "$ARCH" = "armv7hl" ]; then
  SLKCFLAGS="-O3 -march=armv7-a -mfpu=vfpv3-d16"
  LIBDIRSUFFIX=""
else
  LIBDIRSUFFIX=""
fi

# Don't use icecream:
PATH=$(echo $PATH | sed "s|/usr/libexec/icecc/bin||g" | tr -s : | sed "s/^://g" | sed "s/:$//g")

TMP=$CWD
PKG=$TMP/package-$PKGVER

rm -rf $PKG
mkdir -p $TMP $PKG

cd $TMP
rm -rf $PKGNAM-$PKGVER
tar xf $CWD/$PKGNAM-$PKGVER.tar.xz || exit 1
cd $PKGNAM-$PKGVER || exit 1

chown -R root:root .
find . \
  \( -perm 777 -o -perm 775 -o -perm 711 -o -perm 555 -o -perm 511 \) \
  -exec chmod 755 {} \+ -o \
  \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
  -exec chmod 644 {} \+

# Fix DejaVuSans.ttf location so that grub-mkfont can create *.pf2 files for starfield theme.
sed 's|/usr/share/fonts/dejavu|/usr/share/fonts/dejavu /usr/share/fonts/TTF|g' -i "configure.ac"

# Use /boot/initrd.gz and /boot/initrd-$version a valid initrd names, load the
# modules all_video of linux entries in /etc/grub.d/3O_os-prober
patch -p1 --verbose < $CWD/add_initrd_names_and_load_video_module_for_linux.diff || exit 1

# Fix alignment error with gcc8:
zcat $CWD/0198-align-struct-efi_variable-better.patch.gz | patch -p1 --verbose || exit 1

# Modify grub-mkconfig behaviour so automatically generated entries read 'Slint Linux'
sed 's|GNU/Linux|Linux|' -i "util/grub.d/10_linux.in"

for _arch in i386-pc x86_64-efi x86_64-emu i386-efi; do
	ENABLESTACKPROTECTOR=""
	if echo $_arch|grep -q efi; then
		ENABLESTACKPROTECTOR="--enable-stack-protector"
	fi
	mkdir $CWD/${PKGNAM}-$PKGVER/build_"$_arch"
	cd $CWD/${PKGNAM}-$PKGVER/build_"$_arch"
	 CFLAGS="$SLKCFLAGS" \
	../configure \
	--with-platform="${_arch##*-}" \
	--target="${_arch%%-*}"  \
	--prefix=/usr \
	--libdir=/usr/lib${LIBDIRSUFFIX} \
	--sysconfdir=/etc \
	--localstatedir=/var \
	--infodir=/usr/info \
	--mandir=/usr/man \
	--enable-cache-stats \
	--enable-grub-emu-sdl \
	--enable-boot-time \
	--enable-grub-mkfont \
	--enable-grub-mount \
	$ENABLESTACKPROTECTOR \
	--enable-device-mapper \
	--enable-liblzma \
	--disable-werror
	make $NUMJOBS || make || exit 1
	make install DESTDIR=$PKG || exit 1
	cd -
done
echo "make install terminé"
# Preserve the contents of /etc/grub.d/40_custom:
mv $PKG/etc/grub.d/40_custom $PKG/etc/grub.d/40_custom.new

# Strip binaries:
( cd $PKG
  find . | xargs file | grep "executable" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null
  find . | xargs file | grep "shared object" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null
)

# Put bash-completion file in system directory:
mkdir -p $PKG/usr/share/bash-completion/completions/
mv $PKG/etc/bash_completion.d/grub \
   $PKG/usr/share/bash-completion/completions/grub
rmdir --parents $PKG/etc/bash_completion.d 2>/dev/null

# Install default options file:
mkdir -p $PKG/etc/default
cat $CWD/grub > $PKG/etc/default/grub.new

# Create a directory for grub.cfg:
mkdir -p $PKG/boot/grub

# Add fonts. grub-mkrescue looks for /usr/share/grub/unicode.pf2.
$PKG/usr/bin/grub-mkfont -o $PKG/usr/share/grub/unicode.pf2 \
    -abv $CWD/unifont-12.1.02.bdf
FONT_SIZE=${FONT_SIZE:-19}
if [ -r /usr/share/fonts/TTF/DejaVuSansMono.ttf ]; then
  $PKG/usr/bin/grub-mkfont -o $PKG/usr/share/grub/dejavusansmono.pf2 -abv \
  -s $FONT_SIZE /usr/share/fonts/TTF/DejaVuSansMono.ttf
fi

# Add a documentation directory:
mkdir -p $PKG/usr/doc/${PKGNAM}-$PKGVER
cp -a \
  AUTHORS BUGS COPYING* INSTALL NEWS README* THANKS TODO \
  $PKG/usr/doc/${PKGNAM}-$PKGVER

# Compress and if needed symlink the man pages:
if [ -d $PKG/usr/man ]; then
  ( cd $PKG/usr/man
    for manpagedir in $(find . -type d -name "man*") ; do
      ( cd $manpagedir
        for eachpage in $( find . -type l -maxdepth 1) ; do
          ln -s $( readlink $eachpage ).gz $eachpage.gz
          rm $eachpage
        done
        gzip -9 *.?
      )
    done
  )
fi

# Compress info files, if any:
if [ -d $PKG/usr/info ]; then
  ( cd $PKG/usr/info
    rm -f dir
    gzip -9 *
  )
fi

# If there's a ChangeLog, installing at least part of the recent history
# is useful, but don't let it get totally out of control:
if [ -r ChangeLog ]; then
  DOCSDIR=$(echo $PKG/usr/doc/${PKGNAM}-$PKGVER)
  cat ChangeLog | head -n 1000 > $DOCSDIR/ChangeLog
  touch -r ChangeLog $DOCSDIR/ChangeLog
fi

mkdir -p $PKG/install
zcat $CWD/doinst.sh.gz > $PKG/install/doinst.sh
cat $CWD/slack-desc > $PKG/install/slack-desc

cd $PKG
/sbin/makepkg -l y -c n $TMP/$PKGNAM-$PKGVER-$ARCH-$BUILD.txz