#!/bin/bash

# Slackware build script for pcsx2

# Copyright 2022-2024 Steven Voges <Oregon, USA>
# Copyright 2025 Ruoh-Shoei LIN
# Copyright 2026 Danilo M. <danix@danix.xyz>
# 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)

PRGNAM=pcsx2
VERSION=${VERSION:-2.8.2}
PATCHVER=${PATCHVER:-7e1b6936ad2a70c9e28ae21c7c2f3b1510a1736f}
GIT_DATE=${GIT_DATE:-2026-09-04 15:25:34 +0000}
GIT_VERSION=${GIT_VERSION:-v2.8.2}
GIT_HASH=${GIT_HASH:-fd9d310ccbb6b8b62c976da8886a3c8fd3a10ff3}

# Slackware -current ships SDL3, Qt6, libpng, libjpeg-turbo, libwebp, lz4,
# zstd, ffmpeg and the Vulkan headers at or above the versions upstream pins,
# and kddockwidgets ships in the KDE series. Only the deps below have no
# packaged counterpart, so they are the only ones built here. Versions are
# upstream's pins from .github/workflows/scripts/linux/build-dependencies-qt.sh.
LIBBACKTRACE=${LIBBACKTRACE:-ad106d5fdd5d960bd33fae1c48a351af567fd075}
PLUTOVG=${PLUTOVG:-1.3.2}
PLUTOSVG=${PLUTOSVG:-0.0.7}
RAPIDYAML=${RAPIDYAML:-0.12.1}
SHADERC=${SHADERC:-2026.2}
SHADERC_GLSLANG=${SHADERC_GLSLANG:-275822a6261ee689aadb1da5f09a0ec2f058685c}
SHADERC_SPIRVHEADERS=${SHADERC_SPIRVHEADERS:-58006c901d1d5c37dece6b6610e9af87fa951375}
SHADERC_SPIRVTOOLS=${SHADERC_SPIRVTOOLS:-6337eb62cadd7d124ac6789bf39c0f71148f0a73}

BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}
PKGTYPE=${PKGTYPE:-tgz}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i586 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi

if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
  exit 0
fi

TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}
DEPS=$TMP/$PRGNAM-$VERSION/deps

if [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
else
  echo "$ARCH is not supported: pcsx2 requires a 64-bit x86 CPU." 1>&2
  exit 1
fi

set -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$VERSION
tar xvf $CWD/$PRGNAM-$VERSION.tar.gz
cd $PRGNAM-$VERSION

chown -R root:root .
find -L . \
 \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
  -o -perm 511 \) -exec chmod 755 {} \; -o \
 \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;

# Upstream only supports clang; -current's llvm provides it.
export CC=clang
export CXX=clang++

# The unpackaged deps are built static and installed into a private prefix
# that only the pcsx2 build sees, so nothing lands in the package and no
# LD_LIBRARY_PATH wrapper is needed at runtime.
mkdir -p ${DEPS}-build
pushd ${DEPS}-build

echo "Building libbacktrace..."
tar xvf $CWD/libbacktrace-$LIBBACKTRACE.tar.gz
( cd libbacktrace-$LIBBACKTRACE
  CFLAGS="$SLKCFLAGS" ./configure --prefix="$DEPS" --with-pic \
    --enable-static --disable-shared
  make
  make install )

echo "Building PlutoVG..."
tar xvf $CWD/plutovg-$PLUTOVG.tar.gz
( cd plutovg-$PLUTOVG
  cmake -B build -G Ninja \
    -DCMAKE_BUILD_TYPE=Release \
    -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
    -DCMAKE_PREFIX_PATH="$DEPS" \
    -DCMAKE_INSTALL_PREFIX="$DEPS" \
    -DBUILD_SHARED_LIBS=OFF \
    -DPLUTOVG_BUILD_EXAMPLES=OFF
  cmake --build build
  ninja -C build install )

echo "Building PlutoSVG..."
tar xvf $CWD/plutosvg-$PLUTOSVG.tar.gz
( cd plutosvg-$PLUTOSVG
  cmake -B build -G Ninja \
    -DCMAKE_BUILD_TYPE=Release \
    -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
    -DCMAKE_PREFIX_PATH="$DEPS" \
    -DCMAKE_INSTALL_PREFIX="$DEPS" \
    -DBUILD_SHARED_LIBS=OFF \
    -DPLUTOSVG_ENABLE_FREETYPE=OFF \
    -DPLUTOSVG_BUILD_EXAMPLES=OFF
  cmake --build build
  ninja -C build install )

echo "Building RapidYAML..."
tar xvf $CWD/rapidyaml-$RAPIDYAML-src.tgz
( cd rapidyaml-$RAPIDYAML-src
  cmake -B build -G Ninja \
    -DCMAKE_BUILD_TYPE=Release \
    -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS" \
    -DCMAKE_PREFIX_PATH="$DEPS" \
    -DCMAKE_INSTALL_PREFIX="$DEPS" \
    -DBUILD_SHARED_LIBS=OFF
  cmake --build build
  ninja -C build install )

echo "Building shaderc..."
tar xvf $CWD/shaderc-$SHADERC.tar.gz
( cd shaderc-$SHADERC
  ( cd third_party
    tar xvf $CWD/glslang-$SHADERC_GLSLANG.tar.gz
    mv glslang-$SHADERC_GLSLANG glslang
    tar xvf $CWD/SPIRV-Headers-$SHADERC_SPIRVHEADERS.tar.gz
    mv SPIRV-Headers-$SHADERC_SPIRVHEADERS spirv-headers
    tar xvf $CWD/SPIRV-Tools-$SHADERC_SPIRVTOOLS.tar.gz
    mv SPIRV-Tools-$SHADERC_SPIRVTOOLS spirv-tools )
  patch -p1 < $TMP/$PRGNAM-$VERSION/.github/workflows/scripts/common/shaderc-changes.patch
  cmake -B build -G Ninja \
    -DCMAKE_BUILD_TYPE=Release \
    -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
    -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS" \
    -DCMAKE_PREFIX_PATH="$DEPS" \
    -DCMAKE_INSTALL_PREFIX="$DEPS" \
    -DSHADERC_SKIP_TESTS=ON \
    -DSHADERC_SKIP_EXAMPLES=ON \
    -DSHADERC_SKIP_COPYRIGHT_CHECK=ON
  cmake --build build
  ninja -C build install )

tar xvf $CWD/${PRGNAM}_patches-${PATCHVER}.tar.gz
popd

echo "#define DEFAULT_UPDATER_CHANNEL \"stable\"" > ./pcsx2-qt/DefaultUpdaterChannel.h

# pcsx2 2.8.2 still uses AVCodec::pix_fmts/sample_fmts, removed in ffmpeg 8.
# -current ships ffmpeg 9, so force the bundled ffmpeg headers upstream
# provides for exactly this case. ffmpeg is dlopen'd at runtime, not linked,
# so video capture still uses the system ffmpeg.

mkdir -p build
cd build
  cmake -GNinja \
    -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
    -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS" \
    -DCMAKE_INSTALL_PREFIX=/usr \
    -DLIB_SUFFIX=${LIBDIRSUFFIX} \
    -DMAN_INSTALL_DIR=/usr/man \
    -DCMAKE_PREFIX_PATH="${DEPS}" \
    -DCMAKE_DISABLE_FIND_PACKAGE_FFMPEG=ON \
    -DCMAKE_INTERPROCEDURAL_OPTIMIZATION=ON \
    -DCMAKE_EXE_LINKER_FLAGS_INIT="-fuse-ld=lld -lrt" \
    -DCMAKE_MODULE_LINKER_FLAGS_INIT="-fuse-ld=lld -lrt" \
    -DCMAKE_SHARED_LINKER_FLAGS_INIT="-fuse-ld=lld -lrt" \
    -DENABLE_SETCAP=OFF \
    -DPACKAGE_MODE=ON \
    -DDISABLE_ADVANCE_SIMD=ON \
    -DCMAKE_DISABLE_PRECOMPILE_HEADERS=ON \
    -DPCSX2_APP_DATADIR=/usr/share/PCSX2/resources \
    -DCMAKE_BUILD_TYPE=Release ..
  ninja
  ninja unittests
  DESTDIR=$PKG ninja install
cd ..

install -v -Dm644 ./bin/resources/icons/AppIconLarge.png \
	$PKG/usr/share/icons/hicolor/512x512/apps/net.pcsx2.PCSX2.png
install -v -Dm644 ./.github/workflows/scripts/linux/pcsx2-qt.desktop \
	$PKG/usr/share/applications/net.pcsx2.PCSX2.desktop
desktop-file-edit \
    --set-key=Icon \
    --set-value=net.pcsx2.PCSX2 \
    $PKG/usr/share/applications/net.pcsx2.PCSX2.desktop
sed -i \
    "s/@GIT_VERSION@/$GIT_VERSION/g;s/@GIT_DATE@/$GIT_DATE/g;s/@GIT_HASH@/$GIT_HASH/g" \
    .github/workflows/scripts/linux/pcsx2-qt.metainfo.xml.in
install -v -Dm644 .github/workflows/scripts/linux/pcsx2-qt.metainfo.xml.in \
	$PKG/usr/share/metainfo/net.pcsx2.PCSX2.metainfo.xml

# pcsx2_patches, collection of game patches (e.g. widescreen hacks)
zip -mTj9 \
    $CWD/patches.zip \
    ${DEPS}-build/${PRGNAM}_patches-${PATCHVER}/patches/*
install -Dm644 $CWD/patches.zip -t $PKG/usr/share/PCSX2/resources

find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a \
  COPYING.* README.md bin/docs \
  $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

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

cd $PKG
/sbin/makepkg -l y -c n --remove-rpaths $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE