#!/bin/bash

# Slackware build script for gpufetch
# Copyright (c) 2026 Moletastic
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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

PRGNAM=gpufetch
VERSION=${VERSION:-0.25}
BUILD=${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 [ -n "$PRINT_PACKAGE_NAME" ]; then
  echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
  exit 0
fi

if [ "$ARCH" != "x86_64" ]; then
  echo "$PRGNAM: only x86_64 is supported" >&2
  exit 1
fi

SLKCFLAGS="-O2 -fPIC"

case "${CUDA:-no}" in
  yes)
    echo "$PRGNAM: CUDA=yes is experimental and untested" >&2
    NVCC=${NVCC:-$(command -v nvcc || true)}
    if [ ! -x "$NVCC" ]; then
      echo "$PRGNAM: CUDA=yes requires nvcc; set NVCC to its path" >&2
      exit 1
    fi
    CUDA_OPTS=(-DENABLE_CUDA_BACKEND=ON -DCMAKE_CUDA_COMPILER="$NVCC")
    ;;
  no)
    CUDA_OPTS=(-DENABLE_CUDA_BACKEND=OFF)
    ;;
  *)
    echo "$PRGNAM: CUDA must be yes or no" >&2
    exit 1
    ;;
esac

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

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"

patch -p1 < "$CWD/gpufetch.1.patch"

chown -R root:root .
find . \
  \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
     -o -perm 511 \) -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 downloads pciutils at configure time if the system copy is missing.
if [ ! -r /usr/include/pci/pci.h ] || [ ! -e /usr/lib64/libpci.so ]; then
  echo "$PRGNAM: Slackware's pciutils headers and library are required" >&2
  exit 1
fi

cmake -S . -B build \
  -DCMAKE_BUILD_TYPE=Release \
  -DCMAKE_CXX_FLAGS_RELEASE="$SLKCFLAGS" \
  -DCMAKE_INSTALL_PREFIX=/usr \
  -DCMAKE_SKIP_RPATH=ON \
  "${CUDA_OPTS[@]}" \
  -DENABLE_INTEL_BACKEND=ON \
  -DPCIUTILS_INCLUDE_DIR=/usr/include \
  -DPCIUTILS_LIBRARIES=/usr/lib64/libpci.so
cmake --build build

install -D -m 0755 build/gpufetch "$PKG/usr/bin/gpufetch"
strip --strip-unneeded "$PKG/usr/bin/gpufetch"
install -D -m 0644 gpufetch.1 "$PKG/usr/man/man1/gpufetch.1"
gzip -9 "$PKG/usr/man/man1/gpufetch.1"

mkdir -p "$PKG/usr/doc/$PRGNAM-$VERSION"
cp -a LICENSE README.md "$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"

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