#!/bin/bash

# Copyright 2007, 2008, 2009, 2010, 2012, 2016, 2017, 2019, 2020, 2021  Eric Hameleers, Eindhoven, Netherlands
# Copyright 2026  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.

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

PKGNAM=qemu
VERSION=${VERSION:-$(echo $PKGNAM-*.tar.?z | rev | cut -f 3- -d . | cut -f 1 -d - | rev)}
BUILD=${BUILD:-1}

# Allow user to specify a specific set of supported audio backends:
AUDIO_DRV=${AUDIO_DRV:-"sdl,alsa,oss,pa,pipewire"}

# Build with SPICE protocol support by default:
USE_SPICE_PROTOCOL=${USE_SPICE_PROTOCOL:---enable-spice-protocol}

# Build with SPICE support by default:
USE_SPICE=${USE_SPICE:---enable-spice}

# Build with libslirp support by default:
USE_SLIRP=${USE_SLIRP:---enable-slirp}

# Build with usbredir support by default:
USE_USBREDIR=${USE_USBREDIR:---enable-usb-redir}

# Build with VNC support by default:
USE_VNC=${USE_VNC:---enable-vnc --enable-vnc-sasl --enable-vnc-jpeg}

# Default 32-bit targets:
TARGETS32=${TARGETS32:-i386-softmmu,i386-linux-user,arm-softmmu,arm-linux-user,armeb-linux-user,riscv32-softmmu,riscv32-linux-user,sparc-softmmu,sparc-linux-user}

# Default 64-bit targets:
TARGETS64=${TARGETS64:-x86_64-softmmu,x86_64-linux-user,aarch64-softmmu,aarch64-linux-user,loongarch64-softmmu,loongarch64-linux-user,riscv64-softmmu,riscv64-linux-user,sparc64-softmmu,sparc64-linux-user}

# Unless TARGET_LIST was provided by the user, set the target list based
# on 32 or 64 bit arch:
if [ "$(getconf LONG_BIT)" = "64" ]; then
  # Set default target list for 64-bit.
  TARGET_LIST=${TARGET_LIST:-"$TARGETS64,$TARGETS32"}
else
  # Set default target list for 32-bit.
  TARGET_LIST=${TARGET_LIST:-"$TARGETS32"}
fi

# Automatically determine the architecture we're building on:
if [ -z "$ARCH" ]; then
  case "$(uname -m)" in
    i?86) ARCH=i686 ;;
    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-$VERSION-$ARCH-$BUILD.txz"
  echo "$PKGNAM-guest-agent-$VERSION-$ARCH-$BUILD.txz"
  exit 0
fi

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

if [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=pentium4 -mtune=generic"
  LIBDIRSUFFIX=""
  KVMARCH="i386"
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -march=x86-64 -mtune=generic -fPIC"
  LIBDIRSUFFIX="64"
  KVMARCH="x86_64"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
  KVMARCH=""
fi

# Fail on undeclared variables and broken pipes:
set -u -o pipefail

TMP=${TMP:-/tmp}
PKG=$TMP/package-$PKGNAM
PKG2=$TMP/package-$PKGNAM-guest-agent

rm -rf $PKG $PKG2
mkdir -p $TMP $PKG $PKG2

cd $TMP
rm -rf $PKGNAM-$VERSION
echo "Extracting $CWD/$PKGNAM-$VERSION.tar.?z..."
tar xf $CWD/$PKGNAM-$VERSION.tar.?z || exit 1
cd $PKGNAM-$VERSION || 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 {} \+

# Configure, build, and install:
if [ ! -r configure ]; then
  if [ -x ./autogen.sh ]; then
    NOCONFIGURE=1 ./autogen.sh
  else
    autoreconf -vif
  fi
fi
CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
unshare -n ./configure \
  --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --sysconfdir=/etc \
  --localstatedir=/var \
  --docdir=/usr/doc/$PKGNAM-$VERSION \
  --mandir=/usr/man \
  --infodir=/usr/info \
  --enable-gtk \
  --enable-malloc=jemalloc \
  --enable-kvm \
  --enable-linux-io-uring \
  --enable-nettle \
  --enable-sdl \
  --enable-system \
  --enable-vde \
  --enable-virtfs \
  --target-list=${TARGET_LIST} \
  --audio-drv-list=${AUDIO_DRV} \
  $USE_SPICE_PROTOCOL \
  $USE_SPICE \
  $USE_SLIRP \
  $USE_USBREDIR \
  $USE_VNC \
  || exit 1
make $NUMJOBS || make || exit 1
make install DESTDIR=$PKG || exit 1

# Don't ship .la files:
rm -f $PKG/{,usr/}lib${LIBDIRSUFFIX}/*.la

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

# Create "qemu-kvm" symlink. some 3rd party frontends look for it:
[ ! -z $KVMARCH ] && ln -s qemu-system-$KVMARCH $PKG/usr/bin/qemu-kvm

# We might as well install the guest agest boot script here also, just to make
# the QEMU package complete. Someone might install it in a guest when they
# really only needed the guest agent, and that should be fine.
mkdir -p $PKG/etc/rc.d
cp -a $CWD/rc.qemu-ga $PKG/etc/rc.d/rc.qemu-ga.new
chown root:root $PKG/etc/rc.d/rc.qemu-ga.new
chmod 644 $PKG/etc/rc.d/rc.qemu-ga.new

# Compress manual pages:
find $PKG/usr/man -type f -exec gzip -9 {} \+
for i in $( find $PKG/usr/man -type l ) ; do
  ln -s $( readlink $i ).gz $i.gz
  rm $i
done

# Add a documentation directory:
mkdir -p $PKG/usr/doc/${PKGNAM}-$VERSION
cp -a \
  COPYING* Changelog LICENSE* MAINTAINERS* README* VERSION* \
  $PKG/usr/doc/${PKGNAM}-$VERSION

# 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}-$VERSION)
  cat ChangeLog | head -n 1000 > $DOCSDIR/ChangeLog
  touch -r ChangeLog $DOCSDIR/ChangeLog
fi

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

pushd $PKG
/sbin/makepkg -l y -c n $TMP/$PKGNAM-$VERSION-$ARCH-$BUILD.txz
popd

# Build qemu-guest-agent package:
# Install the binary:
mkdir -p $PKG2/usr/bin
cp -a $PKG/usr/bin/qemu-ga $PKG2/usr/bin/qemu-ga
# Install helper script which gets called when the host issues a 'fsfreeze':
mkdir -p $PKG2/etc/qemu/fsfreeze-hook.d
cp -a scripts/qemu-guest-agent/fsfreeze-hook $PKG2/etc/qemu/fsfreeze-hook
chown root:root $PKG2/etc/qemu/fsfreeze-hook
chmod 755 $PKG2/etc/qemu/fsfreeze-hook
# Install a boot script:
mkdir -p $PKG2/etc/rc.d
cp -a $CWD/rc.qemu-ga $PKG2/etc/rc.d/rc.qemu-ga.new
chown root:root $PKG2/etc/rc.d/rc.qemu-ga.new
chmod 644 $PKG2/etc/rc.d/rc.qemu-ga.new
# Add a documentation directory (at least the licenses):
mkdir -p $PKG2/usr/doc/${PKGNAM}-guest-agent-$VERSION
cp -a \
  COPYING* LICENSE* \
  $PKG2/usr/doc/${PKGNAM}-guest-agent-$VERSION
# Pachage metadata:
mkdir -p $PKG2/install
cat $CWD/qemu-guest-agent.doinst.sh > $PKG2/install/doinst.sh
cat $CWD/qemu-guest-agent.slack-desc > $PKG2/install/slack-desc
cd $PKG2
/sbin/makepkg -l y -c n $TMP/$PKGNAM-guest-agent-$VERSION-$ARCH-$BUILD.txz