#!/bin/bash

# Copyright 2008, 2009, 2010, 2011, 2018, 2019  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=flac
VERSION=${VERSION:-$(echo $PKGNAM-*.tar.?z* | rev | cut -f 3- -d . | cut -f 1 -d - | rev)}
BUILD=${BUILD:-1_slack14.0}

# Automatically determine the architecture we're building on:
if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) export ARCH=i486 ;;
    arm*) export ARCH=arm ;;
    # Unless $ARCH is already set, use uname -m for all other archs:
       *) export ARCH=$( 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 "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PKGNAM-$VERSION-$ARCH-$BUILD.txz"
  exit 0
fi

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

if [ "$ARCH" = "i486" ]; then
  SLKCFLAGS="-O2 -march=i486 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "s390" ]; then
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

TMP=${TMP:-/tmp}
PKG=$TMP/package-flac

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

cd $TMP
rm -rf flac-$VERSION
tar xvf $CWD/flac-$VERSION.tar.?z* || exit 1
cd flac-$VERSION
zcat $CWD/flac.man.diff.gz | patch -p1 --verbose --backup --suffix=.orig || exit 1

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 {} \+

if [ "$ARCH" != "x86_64" ]; then
  # We disable assembly optimizations to ensure compatibility with older
  # hardware, but you're welcome to comment this out and give it a try.
  # I've heard it gives a noticable speedup.
  DISABLE_ASM_OPTIMIZATIONS=${DISABLE_ASM_OPTIMIZATIONS:-"--disable-asm-optimizations"}
else
  DISABLE_ASM_OPTIMIZATIONS=${DISABLE_ASM_OPTIMIZATIONS:-""}
fi

# Disable stack smash protection as this version of GCC does not support it:

CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --mandir=/usr/man \
  --docdir=/usr/doc/flac-${VERSION} \
  --disable-silent-rules \
  $DISABLE_ASM_OPTIMIZATIONS \
  --disable-stack-smash-protection \
  --build=$ARCH-slackware-linux || exit 1

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

# Adjust docs to traditional Slackware location:
mv $PKG/usr/share/doc $PKG/usr
rm $PKG/usr/doc/flac-$VERSION/FLAC.tag
mv $PKG/usr/doc/flac-$VERSION/html/* $PKG/usr/doc/flac-$VERSION
rmdir $PKG/usr/doc/flac-$VERSION/html
# we're not putting 3MB of API docs in the binary package...
( cd $PKG/usr/doc/flac-$VERSION/api && rm -r * )
cat << EOF > $PKG/usr/doc/flac-$VERSION/api/README
Full HTML based API documentation may be found in the FLAC
source package.  It is not included in the binary package due
to size.
EOF
# Add a few more docs:
cp -a \
  AUTHORS COPYING* README \
  $PKG/usr/doc/flac-$VERSION

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

gzip -9 $PKG/usr/man/man?/*.?

mkdir $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc

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