#!/bin/bash

# Slackware build script for ddnet

# Copyright 2024  i3slkiller <i3sl.1.3.3.0@gmail.com> (PGP fingerprint: 7B69 A55C 4533 F5E2 44C2  4889 095A 0992 0ECC A5AF)
# All rights reserved.
#
#   Permission to use, copy, modify, and distribute this software for
#   any purpose with or without fee is hereby granted, provided that
#   the above copyright notice and this permission notice appear in all
#   copies.
#
#   THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 AUTHORS AND COPYRIGHT HOLDERS AND THEIR
#   CONTRIBUTORS 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=ddnet
SRCNAM=DDNet
VERSION=${VERSION:-18.2}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}
PKGTYPE=${PKGTYPE:-tgz}

# These variables are for proper matching version of source and package.
# Regardless whether eg. 18.1-rc1 or 18.1_rc1 was passed into VERSION,
# this script will unpack DDNet-18.1-rc1.tar.xz source tarball (SRCVER=18.1-rc1)
# and produce ddnet-18.1_rc1-ARCH-1_SBo.tgz package (PKGVER=18.1_rc1).
# For stable versions SRCVER and PKGVER will have the same value (SRCVER=PKGVER=18.1).
SRCVER=${VERSION/_/-}
PKGVER=${VERSION/-/_}

# Whether to enable WebSocket support for server
# Requires libwebsockets from SBo
[ ${WEBSOCKETS:-no} == yes ] && USE_WEBSOCKETS=ON || USE_WEBSOCKETS=OFF

# Whether to enable MySQL/MariaDB support for server
[ ${MYSQL:-no} == yes ] && USE_MYSQL=ON || USE_MYSQL=OFF

# Whether to add video recording support using FFmpeg to the client
# Requires x264 from SBo
[ ${VIDEORECORDER:-yes} == yes ] && USE_VIDEORECORDER=ON || USE_VIDEORECORDER=OFF

# Whether to enable UPnP support for the server
# Requires miniupnpc from SBo
[ ${UPNP:-no} == yes ] && USE_UPNP=ON || USE_UPNP=OFF

# Whether to enable the vulkan backend
[ ${VULKAN:-yes} == yes ] && USE_VULKAN=ON || USE_VULKAN=OFF

# Enable interprocedural optimizations, also known as Link Time Optimization (LTO)
[ ${IPO:-no} == yes ] && USE_IPO=ON || USE_IPO=OFF

# Whether to set security-relevant compiler flags like -D_FORTIFY_SOURCE=2 and -fstack-protector-all
[ ${SECURITY_COMPILER_FLAGS:-yes} == yes ] && USE_SECURITY_COMPILER_FLAGS=ON || USE_SECURITY_COMPILER_FLAGS=OFF

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i586 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
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 "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PRGNAM-$PKGVER-$ARCH-$BUILD$TAG.$PKGTYPE"
  exit 0
fi

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

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
elif [ "$ARCH" = "aarch64" ]; then
  SLKCFLAGS="-O2 -fPIC"
else
  SLKCFLAGS="-O2"
fi

set -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $SRCNAM-$SRCVER
tar xvf $CWD/$SRCNAM-$SRCVER.tar.?z
cd $SRCNAM-$SRCVER

# build offline
# configuration tells cargo to use the configured directory
# for dependencies instead of downloading from crates.io
cat << EOF >> .cargo/config.toml
[source]
[source.crates-io]
replace-with = "vendored-sources"

[source.vendored-sources]
directory = "vendor"
EOF

# deps and versions come from Cargo.lock
mkdir vendor
(
  cd vendor

  grep -h -A 4 "\[\[package\]\]" \
      $(find "../" -maxdepth 1 -mindepth 1 -name Cargo.lock | tr '\n' ' ') | \
      sed 's/[[:space:]]*=[[:space:]]*/=/g;s/^--//;s/^\[\[/--\n[[/' | \
      awk 'BEGIN { RS = "--\n" ; FS="\n" } { print $2, $3, $4, $5 }' | \
      sed 's/"//g;s/name=//;s/ version=/=/' | \
      grep " source=" | \
      sed 's/ dependencies=.*$//' | \
      sed 's/ source=[^ ]*//' | \
      sed 's/ checksum=/=/' | \
      sort -u | \
      while read -r dep ; do

    cksum="$(printf "%s\n" "$dep" | cut -d= -f3)"
    ver="$(printf "%s\n" "$dep" | cut -d= -f2)"
    dep="$(printf "%s\n" "$dep" | cut -d= -f1)"

    CRATE_FILE="$CWD/$dep-$ver.crate"

    if [ -z "$cksum" ] ; then
      mkdir $dep-$ver
      tar xvf $CRATE_FILE -C $dep-$ver --strip-components=1
      cksum="null"
    else
      tar xvf $CRATE_FILE
    fi

    touch $dep-$ver/.cargo-ok

    # generate checksum
    {
      printf "{\n"
      printf '    "files": {\n'

      (
        cd $dep-$ver
        find . -type f -print0 | xargs -0 sha256sum | sed -n '/\.cargo-checksum\.json/!p' | sed 's/\.\///;s/^\([^ ]*\)[[:space:]][[:space:]]*\(.*\)$/"\2":"\1",/'
      ) | sed '$ s/,$//'

      printf "    },\n"
      printf '    "package": "%s"'  "$cksum"

      printf "}\n"
    } | python3 -c "import sys, json; data = sys.stdin.read(); print(json.dumps(json.loads(data), sort_keys=True, indent=4, separators=(',', ' : ')))" > $dep-$ver/.cargo-checksum.json
  done
)

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 {} \;

export CARGO_HOME=.cargo

mkdir -p build
cd build
  cmake .. \
    -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
    -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS" \
    -DCMAKE_INSTALL_PREFIX=/usr \
    -DPREFER_BUNDLED_LIBS=OFF \
    -DWEBSOCKETS=$USE_WEBSOCKETS \
    -DMYSQL=$USE_MYSQL \
    -DAUTOUPDATE=OFF \
    -DCLIENT=ON \
    -DVIDEORECORDER=$USE_VIDEORECORDER \
    -DUPNP=$USE_UPNP \
    -DVULKAN=$USE_VULKAN \
    -DIPO=$USE_IPO \
    -DSECURITY_COMPILER_FLAGS=$USE_SECURITY_COMPILER_FLAGS \
    -DCMAKE_BUILD_TYPE=Release \
    -GNinja
  ninja
  DESTDIR=$PKG ninja install/strip
cd ..

install -D -m0644 man/DDNet.6 -t $PKG/usr/man/man6
install -D -m0644 man/DDNet-Server.6 -t $PKG/usr/man/man6
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

mkdir -p "$PKG/usr/doc/$PRGNAM-$PKGVER"
cp -a \
  README.md license.txt \
  $PKG/usr/doc/$PRGNAM-$PKGVER
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$PKGVER/$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 $OUTPUT/$PRGNAM-$PKGVER-$ARCH-$BUILD$TAG.$PKGTYPE