#!/bin/bash

# Slackware build script for python3-grpcio

# Copyright 2024 Isaac Yu <isaacyu@protonmail.com>
# 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=python3-grpcio
VERSION=${VERSION:-1.63.0}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}
PKGTYPE=${PKGTYPE:-tgz}

SRCNAM=grpc

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}

set -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $SRCNAM-$VERSION
tar xvf $CWD/$SRCNAM-$VERSION.tar.gz
cd $SRCNAM-$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 {} \;

# environmental variables taken from the Arch Linux PKGBUILD
export GRPC_PYTHON_LDFLAGS="$(pkg-config --libs protobuf)"
export GRPC_PYTHON_BUILD_WITH_CYTHON=1
export GRPC_PYTHON_BUILD_SYSTEM_OPENSSL=1
export GRPC_PYTHON_BUILD_SYSTEM_ZLIB=1
export GRPC_PYTHON_BUILD_SYSTEM_CARES=1
export GRPC_PYTHON_BUILD_SYSTEM_RE2=1
export GRPC_PYTHON_BUILD_SYSTEM_ABSL=1
export GRPC_BUILD_WITH_BORING_SSL_ASM=0

# Build python3-grcpio
GRPC_PYTHON_CFLAGS="-fvisibility=hidden -fno-wrapv -fno-exceptions $(pkg-config --cflags protobuf) -std=c++17" \
  python3 setup.py install --root=$PKG

# Use system protobuf (taken from the Arch Linux PKGBUILD)
sed -r -i \
    -e '/^CC_FILES=\[/,/\]/{/^CC_FILES=\[/n;/\]/!d;}' \
    -e '/^CC_INCLUDES=\[/,/\]/{/^CC_INCLUDES=\[/n;/\]/!d;}' \
    -e "s@^(PROTO_INCLUDE=')[^']+'@\1/usr/include'@" \
    -e '/^PROTOBUF_SUBMODULE_VERSION=/d' \
    tools/distrib/python/grpcio_tools/protoc_lib_deps.py
ln -s ../../../.. tools/distrib/python/grpcio_tools/grpc_root

# Build python3-grcpio_tools
cd tools/distrib/python/grpcio_tools
GRPC_PYTHON_CFLAGS="-fno-wrapv -frtti $(pkg-config --cflags protobuf)" \
  GRPC_PYTHON_LDFLAGS="$(pkg-config --libs protobuf) -lprotoc" \
  python3 setup.py install --root=$PKG
cd $TMP/$SRCNAM-$VERSION

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

# All the .md files
MD=( CODE-OF-CONDUCT.md CONTRIBUTING.md GOVERNANCE.md MAINTAINERS.md README.md SECURITY.md TROUBLESHOOTING.md )

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a AUTHORS ${MD[@]} LICENSE NOTICE.txt $PKG/usr/doc/$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