#!/bin/bash

# Slackware build script for Benben
#
# Copyright 2023-2024 Remilia Scarlet, Colorado, United States
# 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=benben
VERSION=${VERSION:-0.6.2}
BUILD=${BUILD:-2}
TAG=${TAG:-_lngn}
PKGTYPE=${PKGTYPE:-txz}

# The way Crystal builds stuff is at odds with SlackBuild scripts.  These are
# our individual vendored dependencies.
BENBEN_DEP_SOURCES="libremiliacr-0.92.5.tar.bz2 \
                    haematite-0.5.4.tar.bz2 \
                    remiaudio-0.9.1.tar.bz2 \
                    remislang-0.1.2.tar.bz2 \
                    racodecs-0.1.1.tar.bz2 \
                    remixmp-1.0.1.tar.bz2 \
                    yunosynth-0.5.2.tar.bz2 \
                    zstd.cr-1.2.0.tar.gz"

# Automatically determine the architecture we're building on:
if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i586 ;;
    arm*) ARCH=arm ;;
    # Unless $ARCH is already set, use uname -m for all other archs:
    *) ARCH=$( 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-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
  exit 0
fi

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

if [ "$ARCH" = "i686" ]; then
  CRYSTAL_SLACK_FLAGS="--mcpu=x86"
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
elif [ "$ARCH" = "x86_64" ]; then
  CRYSTAL_SLACK_FLAGS="--mcpu=x86-64"
  SLKCFLAGS="-O2 -fPIC"
elif [ "$ARCH" = "aarch64" ]; then
  CRYSTAL_SLACK_FLAGS=""
  SLKCFLAGS="-O2 -fPIC"
else
  CRYSTAL_SLACK_FLAGS=""
fi

set -e # Exit on most errors

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$VERSION
tar xvf $CWD/$PRGNAM-$VERSION.tar.bz2
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 {} \;

# Make a lib directory, then unpack dependencies into the correct place, and add
# a required symlink.  This replicates what the Shards command normally does
# when building Crystal software.
#
# NOTE: Technically the zstd.cr bindings have a postinstall script specified in
# shard.yml that creates a local copy of the ZStandard library.  However, this
# isn't needed for Slackware and is thus skipped.
mkdir -p lib
for depSrc in $BENBEN_DEP_SOURCES; do
    cp $CWD/$depSrc lib
    (
        cd lib
        tar xvzf $depSrc || tar xvjf $depSrc
    )
done
(
    cd lib

    mv libremiliacr-0.92.5 libremiliacr
    mv haematite-0.5.4 haematite
    mv remiaudio-0.9.1 remiaudio
    mv remislang-0.1.2 remislang
    mv racodecs-0.1.1 racodecs
    mv remixmp-1.0.1 remixmp
    mv yunosynth-0.5.2 yunosynth
    mv zstd.cr-1.2.0 zstd

    # The ../ actually points to the lib directory we've created
    ln -sf ../ libremiliacr/lib
    ln -sf ../ haematite/lib
    ln -sf ../ remiaudio/lib
    ln -sf ../ remislang/lib
    ln -sf ../ racodecs/lib
    ln -sf ../ remixmp/lib
    ln -sf ../ yunosynth/lib
    ln -sf ../ zstd/lib
)

# Configuration is done with a configure.rb Ruby script.
mkdir bin
./configure.rb --prefix=/usr --sharedir=share/benben

# We must build a C-wrapper for libsidplayfp.
echo "Building libsidplayfp C wrapper"
(
    cd src/audio-formats/lib
    CFLAGS="$SLKCFLAGS" CXXFLAGS="$SLKCFLAGS" make -j1
)

# We must build RemiAudio's resampler tables as well.
echo "Building resampler tables"
(
    cd lib/remiaudio/src/remiaudio/resampler/
    CFLAGS="$SLKCFLAGS" CXXFLAGS="$SLKCFLAGS" make -j1
)

# Build the program.  We don't use rake here since the Rakefile will attempt to
# download dependencies.  The way we call the compiler is the same as how
# rake/shards does anyway.
echo "Building Benben directly with Crystal (this may take a while)"
CRYSTAL_OPTS="$CRYSTAL_SLACK_FLAGS" \
  crystal \
    build \
    -p \
    -Dpreview_mt \
    --release \
    --target=$ARCH-unknown-linux-gnu \
    --no-debug \
    -Dyunosynth_wd40 \
    -Dremiaudio_wd40 \
    -Dhaematite_wd40 \
    -Dstrict_multi_assign \
    -Dno_number_autocast \
    -o bin/$PRGNAM \
    src/main.cr

# Build the remote-benben program.  We don't use rake here either.

CRYSTAL_OPTS="$CRYSTAL_SLACK_FLAGS" \
  crystal \
    build \
    -p \
    -Dpreview_mt \
    --release \
    --target=$ARCH-unknown-linux-gnu \
    --no-debug \
    -Dyunosynth_wd40 \
    -Dremiaudio_wd40 \
    -Dhaematite_wd40 \
    -Dstrict_multi_assign \
    -Dno_number_autocast \
    -Dcompile_benben_remote \
    tools/remote-benben/main.cr \
    -o bin/remote-$PRGNAM

# Build man page.  We can use the Rakefile for this.
rake man

# Build info manual and PDF manual.  We can use the Rakefile for this.
rake info
rake pdf
gzip -9 man/texi/$PRGNAM.info

# Copy the program, man pages, etc. into the $PKG directory
mkdir -p $PKG/usr/bin
cp -v bin/$PRGNAM $PKG/usr/bin
cp -v bin/remote-$PRGNAM $PKG/usr/bin
mkdir -p $PKG/usr/man/man1
cp -v man/$PRGNAM.1.gz $PKG/usr/man/man1
mkdir -p $PKG/usr/info
cp -v man/texi/$PRGNAM.info.gz $PKG/usr/info

# Strip binaries and libraries - this can be done with 'make install-strip'
# in many source trees, and that's usually acceptable if so, but if not,
# use this:
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

# Copy program documentation into the package
# The included documentation varies from one application to another, so be sure
# to adjust your script as needed
# Also, include the SlackBuild script in the documentation directory
mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
cat $CWD/README > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
cat man/texi/$PRGNAM.html > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.html
cat man/texi/$PRGNAM.pdf > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.pdf

# Copy the slack-desc into ./install
mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc
cat $CWD/slack-required > $PKG/install/slack-required

# Make the package; be sure to leave it in $OUTPUT
# If package symlinks need to be created during install *before*
# your custom contents of doinst.sh runs, then add the -p switch to
# the makepkg command below -- see makepkg(8) for details
cd $PKG
/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE