# Maintainer: Xenhat Hex (aur@xenh.at)
# Contributor: Justin Jagieniak <justin@jagieniak.net>
# Contributor: Rye Mutt
#
# shellcheck disable=2034,3030,2154
pkgname=alchemy-next-viewer-git
pkgver=6.11.50933.b7b3c99172
pkgrel=2
pkgdesc="A Second Life client with focus on performance and code correctness."
arch=('x86_64')
license=('LGPL')
options=('!buildflags' '!lto' '!strip')
url="https://www.alchemyviewer.org"
depends=(dbus-glib glu gtk3 libgl libiconv libidn libjpeg-turbo libpng libxss libxml2 mesa nss openal sdl2 vlc xdg-desktop-portal zlib)
makedepends=('gcc' 'python-virtualenv' 'python-pip' 'git' 'xz')
optdepends=(
  'alsa-lib: ALSA support'
  'freealut: OpenAL support'
  'gamemode: Gamemode support'
  'lib32-libidn11: SLVoice support'
  'lib32-libsndfile: SLVoice support'
  'lib32-util-linux: SLVoice support'
  'lib32-gstreamer0.10: SLVoice support'
  'libpulse: PulseAudio support'
  'mesa-libgl: Intel, Radeon, Nouveau support'
  'nvidia-libgl: NVIDIA support'
  'nvidia-utils: NVIDIA support'
  'wine: More up-to-date, less buggy SLVoice support')
replaces=('alchemy-viewer-git')
provides=('alchemy-viewer')
install=alchemy.install
source=("${pkgname}"::'git+https://git.alchemyviewer.org/alchemy/alchemy-next.git#branch='"${AL_BRANCH_OVERRIDE:-main}")
sha256sums=('SKIP')

_distname="Alchemy-Config-Simple"

# template start; name=systemd-git; version=1.0;
_distdir="${_distname}-${pkgver}"
depends+=(systemd-libs)
conflicts+=("alchemy-next-viewer-nosystemd-git")

pkgver() {
  cd "${pkgname}" || exit 1
  (
    set -o pipefail
    vwr_version=$(cat indra/newview/VIEWER_VERSION.txt)
    rev=$(git rev-list --count HEAD)
    short=$(git rev-parse --short HEAD)
    printf "%s.%s.%s" "${vwr_version}" "${rev}" "${short}"
  )
}

prepare() {
  cd "${pkgname}" || exit 1
  export USE_VENV=1
# template start; name=prepare; version=1.0;
if [[ -n "$USE_VENV" ]]; then
  virtualenv ".venv" -p python3
  . ".venv/bin/activate"
fi

echo "Installing build toolchain..."
pip3 install --upgrade certifi --quiet
pip3 install --upgrade llbase --quiet
pip3 install --no-cache --upgrade autobuild --quiet
pip3 install --upgrade cmake ninja

# vi: set ai softtabstop=2 shiftwidth=2 tabstop=2 expandtab ft=sh :
# template end;
}

build() {
  cd "${pkgname}" || exit 1
  export USE_VENV=1
# template start; name=build; version=1.0;
if command -v schedtool >/dev/null 2>&1; then
	# Set current shell and all descendents as SCHED_BATCH, see schedtool(8)
	schedtool -B $$
	prefix_cmd='schedtool -B -n20 -e '
fi
	if [[ -n "$USE_VENV" ]]; then
		. ".venv/bin/activate"
	fi
	build_jobs=$(nproc)
	if [[ -z "$NO_SMART_JOB_COUNT" ]]; then
		if [[ ${build_jobs} -gt 1 ]]; then
			jobs=1
			# The viewer requires an average of 2GB of memory per core to link
			# Note: Behaviour change compared to the previous versions:
			# This script will no longer try to allocate build memory into swap
			# This is bad practice, and swap should be reserved to evict process
			# memory from physical ram to make place for the current workset.
			# This script will now try to check if swap is present and sufficent
			# for the current used memory to be stored in swap before allocating,
			# and will fallback to conservative allocation if swap is not available
			gigperlinkprocess=2
			mempercorekb=$((gigperlinkprocess * 1048576))
			requiredmemorykb=$(($(nproc) * mempercorekb))
			free_output="$(free --kilo --total | tail -n+2 | tr -s ' ')"
			physical_output=$(grep "Mem:" <<<"$free_output")
			#total_output=$(grep Total: <<< "$free_output")
			usedmemorykbphysical=$(cut -d ' ' -f 3 <<<"$physical_output")
			totalmemorykbphysical=$(cut -d ' ' -f 2 <<<"$physical_output")
			swap_output=$(grep Swap: <<<"$free_output")
			# Determine available swap space
			availableswapkb=0
			if [[ -n "$swap_output" ]]; then
				availableswapkb=$(cut -d ' ' -f 4 <<<"$swap_output")
			fi
			availablememorykbphysical=$(cut -d ' ' -f 7 <<<"$free_output")
			echo "Total memory:         $totalmemorykbphysical (includes swap)"
			echo "Available memory:     $availablememorykbphysical"
			echo "Required memory:      $requiredmemorykb"
			echo "Available physical memory on this system: $((availablememorykbphysical / 1024 / 1024)) GB"
			echo "Estimated required memory to build with all cores: $((requiredmemorykb / 1024 / 1024)) GB"
			if [[ ${requiredmemorykb} -gt ${availablememorykbphysical} ]]; then
				echo "Warning: Not enough available physical memory to build with all cores"
				if [[ ${usedmemorykbphysical} -lt ${availableswapkb} ]]; then
					# use all physical ram as swap will do its job
					echo "There is enough free swap to store the currently used memory"
					jobs=$(((totalmemorykbphysical / 1024 / 1024) / gigperlinkprocess))
				else
					# Not enough swap to hold ram contents, calculate manually
					echo "Allocating build jobs according to available physical memory ("$((availablememorykbphysical / 1024 / 1024))"/"$((requiredmemorykb / 1024 / 1024))"GB)..."
					# FIXME: Goes one iteration beyond what it should
					while [[ $((jobs * mempercorekb)) -lt ${availablememorykbphysical} ]]; do
						jobs=$((jobs + 1))
						echo -e "${jobs} jobs would consume $(((jobs * mempercorekb) / 1024 / 1024))GB"
					done
					# Back off one job count. Not sure why I have to do this but
					# the loop is doing one extra iteration.
					jobs=$((jobs - 1))
				fi
				build_jobs=${jobs}
				echo "Computed job count: ${build_jobs}"
			fi
		fi
	fi
	export AUTOBUILD_CPU_COUNT=$build_jobs
	AL_CMAKE_CONFIG=(
		-DLL_TESTS:BOOL=ON
		-DDISABLE_FATAL_WARNINGS=ON
		-DUSE_LTO:BOOL=OFF
		-DVIEWER_CHANNEL="Alchemy Test"
	)
  echo "BUILDENV: ${BUILDENV[*]}"
  if [[ " ${BUILDENV[*]} " =~ ' ccache ' ]] && command -v ccache; then
    echo "------ Will Use CCACHE ------"
    CMAKE_CXX_COMPILER_LAUNCHER="$(which ccache)"
    export CMAKE_CXX_COMPILER_LAUNCHER
  fi
    $prefix_cmd autobuild configure -A 64 -c ReleaseOS -- "${AL_CMAKE_CONFIG[@]}"
	echo "Building with ${AUTOBUILD_CPU_COUNT} jobs (adjusted)"
	$prefix_cmd autobuild build -A64 -c ReleaseOS --no-configure

# vi: set ai softtabstop=2 shiftwidth=2 tabstop=2 expandtab ft=sh :
# template end;
}

package() {
  mkdir -p "${pkgdir}/opt"
  mkdir -p "${pkgdir}/usr/local/share/applications"
  # Patch shortcut to avoid duplicated entries
  sed -i 's;Name=Alchemy;Name=Alchemy (git build);' "${pkgname}/build-linux-64/newview/packaged/etc/refresh_desktop_app_entry.sh"
  sed -i 's;alchemy-viewer\.desktop;'"${pkgname}\.desktop"';' "${pkgname}/build-linux-64/newview/packaged/etc/refresh_desktop_app_entry.sh"
  mv "${pkgname}/build-linux-64/newview/packaged" "${pkgdir}/opt/${pkgname}"
}
# vi: set ai softtabstop=2 shiftwidth=2 tabstop=2 expandtab ft=bash :

# template end;