#!/bin/bash

# Copyright 2008, 2009, 2010, 2011, 2012, 2013, 2015, 2016, 2018, 2019, 2020, 2021  Patrick J. Volkerding, Sebeka, MN, USA
# 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)

PKGNAM=alsa-lib
VERSION=${VERSION:-$(echo alsa-lib-*.tar.?z | rev | cut -f 3- -d . | cut -f 1 -d - | rev)}
BUILD=${BUILD:-1}

NUMJOBS=${NUMJOBS:-" -j$(expr $(nproc) + 1) "}

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

TMP=${TMP:-/tmp}
PKG=$TMP/package-alsa-lib

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "s390" ]; then
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

# If this package is being built for ALSA (no PulseAudio), use the _alsa $TAG:
if [ ! -r /usr/lib${LIBDIRSUFFIX}/pkgconfig/libpulse.pc ]; then
  TAG="_alsa"
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 "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PKGNAM-$VERSION-$ARCH-$BUILD$TAG.txz"
  exit 0
fi

rm -rf $PKG
mkdir -p $TMP $PKG

cd $TMP
rm -rf alsa-lib-$VERSION
tar xvf $CWD/alsa-lib-$VERSION.tar.?z || exit 1
cd alsa-lib-$VERSION || exit 1

# Fix file missing in 1.1.6:
if [ ! -r src/conf/smixer.conf ]; then
  cp -a $CWD/smixer.conf src/conf
fi

# Untar the configuration files. We'll install them later.
( mkdir ucm-and-topology-configs
  cd ucm-and-topology-configs
  for file in $CWD/alsa-*conf*tar.lz ; do
    tar xvf $file
    mv $(basename $file | cut -f 1-3 -d -)-*/* .
    rmdir $(basename $file | cut -f 1-3 -d -)-*
    mv README.md README-$(echo $(basename $file) | cut -f 1-3 -d -)
  done
)

chown -R root:root .
find . \
  \( -perm 777 -o -perm 775 -o -perm 711 -o -perm 555 -o -perm 511 \) \
  -exec chmod 755 {} \+ -o \
  \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
  -exec chmod 644 {} \+

CFLAGS="$SLKCFLAGS" \
 ./configure \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --enable-mixer-modules \
  --enable-topology \
  --enable-ucm \
  --build=$ARCH-slackware-linux || exit 1

make $NUMJOBS || exit 1
make install DESTDIR=$PKG || exit 1

# Don't ship .la files:
rm -f $PKG/{,usr/}lib${LIBDIRSUFFIX}/*.la

find $PKG | xargs file | grep -e "executable" -e "shared object" \
  | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null

mkdir $PKG/etc
if [ "$TAG" = "_alsa" ]; then
  # Ship an empty asound.conf for ALSA-only system:
  cp -a $CWD/asound.conf.alsa $PKG/etc/asound.conf.new
else
  # Redirect to PulseAudio:
  cp -a $CWD/asound.conf.pulse $PKG/etc/asound.conf.new
fi
chmod 644 $PKG/etc/asound.conf.new
chown root:root $PKG/etc/asound.conf.new

# Install ucm and topology configs:
( cd ucm-and-topology-configs ; tar cf - . ) | ( cd $PKG/usr/share/alsa ; tar xf -)

# TODO?
# ( cd src/pcm/ext
# make jack
# make jack-install )

mkdir -p $PKG/usr/doc/alsa-lib-$VERSION
cp -a \
  INSTALL MEMORY-LEAK NOTES TODO \
  $PKG/usr/doc/alsa-lib-$VERSION
cp -a COPYING $PKG/usr/doc/alsa-lib-$VERSION/COPYING.lib
cp -a aserver/COPYING $PKG/usr/doc/alsa-lib-$VERSION/COPYING.aserver

# If there's a ChangeLog, installing at least part of the recent history
# is useful, but don't let it get totally out of control:
if [ -r ChangeLog ]; then
  DOCSDIR=$(echo $PKG/usr/doc/*-$VERSION)
  cat ChangeLog | head -n 1000 > $DOCSDIR/ChangeLog
  touch -r ChangeLog $DOCSDIR/ChangeLog
fi

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc
zcat $CWD/doinst.sh.gz > $PKG/install/doinst.sh

cd $PKG
/sbin/makepkg -l y -c n $TMP/alsa-lib-$VERSION-$ARCH-$BUILD$TAG.txz