#!/bin/bash

# Slackware build script for mozjpeg

# Originally written by:
# Ryan P.C. McQuen | Everett, WA | <email removed>

# Now maintained by B. Watson (yalhcru@gmail.com)

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version, with the following exception:
# the text of the GPL license may be omitted.

# This program is distributed in the hope that it will be useful, but
# without any warranty; without even the implied warranty of
# merchantability or fitness for a particular purpose. Compiling,
# interpreting, executing or merely reading the text of the program
# may result in lapses of consciousness and/or very being, up to and
# including the end of all existence and the Universe as we know it.
# See the GNU General Public License for more details.

# You may have received a copy of the GNU General Public License along
# with this program (most likely, a file named COPYING).  If not, see
# <http://www.gnu.org/licenses/>.

# 20210310 bkw: update for v4.0.3.
# - upstream switched from autoconf to cmake, so this script can't
#   build older versions any more.
# - cmake chokes when trying to build static libs, apparently because
#   we don't have a static libpng.a. So no more static libs in this
#   package until further notice. If you actually care about this,
#   remind me to look into it again.
# - get rid of man pages, they're identical to the ones from libjpeg-turbo.
# - add profile script.
# - add -Wl,-rpath to .pc files.
# - install HTML docs in /usr/doc.

# 20180101 bkw: Update for v3.3.1. Script still works with 3.1 and 3.2,
# if you can think of a use for them.

# 20170502 bkw:
# - update for v3.2. script tested with v3.1 and still works, in case
#   upstream's updated libjpegturbo API causes a problem (just get the
#   old source, run with VERSION=3.1 in the env).
# - Note: ignore the 'error: ignoring unknown tag NASM' messages, per
#   https://sourceforge.net/p/libjpeg-turbo/mailman/message/34381375/

# 20170310 bkw:
# - take over maintenance
# - i486 => i586
# - build static lib also
# - expand README and slack-desc
# - add JAVA=yes option
# - add API=7 and API=8 options
# - BUILD=2

PRGNAM=mozjpeg
VERSION=${VERSION:-4.0.3}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i586 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi

CWD=$(pwd)
TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

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

set -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$VERSION
tar xvf $CWD/$PRGNAM-$VERSION.tar.gz
cd $PRGNAM-$VERSION
chown -R root:root .
find -L .  -perm /111 -a \! -perm 755 -a -exec chmod 755 {} \+ -o \
        \! -perm /111 -a \! -perm 644 -a -exec chmod 644 {} \+

ARGS=""

# JAVA=yes only tested with openjdk8. We source the profile.d script
# here in case someone's *just* installed jdk|openjdk, so they won't
# have to log out & back in to get this built. This mostly helps out
# sbopkg users.
JAVA="${JAVA:-no}"
if [ "$JAVA" = "yes" ]; then
  ARGS+="-DWITH_JAVA=TRUE "

  # Find a JDK. Presumably a sane admin will only have one of these
  # profile scripts executable, even if he's installed all of them.
  # TODO: maybe let the user specify the JDK to use instead? I'm not
  # sure it actually matters that much ("write once, run anywhere" should
  # mean a .jar built with openjdk will run with Oracle's jdk, right? But
  # there's JNI (native code) involved...)
  for i in jdk openjdk8 openjdk7 openjdk6; do
    if [ -x /etc/profile.d/$i.sh ]; then
      source /etc/profile.d/$i.sh
      break
    fi
  done
fi

API="${API:-6b}"
[ "$API"  = "7" ] && ARGS+="-DWITH_JPEG7=TRUE "
[ "$API"  = "8" ] && ARGS+="-DWITH_JPEG8=TRUE "

mkdir -p build
cd build
  CFLAGS="$SLKCFLAGS" \
  CXXFLAGS="$SLKCFLAGS" \
  cmake \
    $ARGS \
    -DENABLE_STATIC=FALSE \
    -DPNG_LIBRARY_DEBUG=/usr/lib$LIBDIRSUFFIX/libpng.so \
    -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
    -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS" \
    -DCMAKE_INSTALL_PREFIX=/opt/$PRGNAM \
    -DCMAKE_BUILD_TYPE=Release ..
  make
  make install/strip DESTDIR=$PKG
cd ..

# Slackware has these man pages already.
rm -rf $PKG/opt/$PRGNAM/man

# most of the docs are installed in /opt already, but not all.
mkdir -p $PKG/usr/doc
mv $PKG/opt/$PRGNAM/doc $PKG/usr/doc/$PRGNAM-$VERSION
rm -f CMakeLists.txt BUILDING.* jconfig.txt # do not want
cp -a *.txt *.md tjexample.c doc/html $PKG/usr/doc/$PRGNAM-$VERSION
ln -s ../../../usr/doc/$PRGNAM-$VERSION $PKG/opt/$PRGNAM/doc
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

[ "$JAVA" = "yes" ] && cp -a java/doc $PKG/usr/doc/$PRGNAM-$VERSION/javadoc

# 20210312 bkw: profile script is new with v4.0.x. It's installed without +x
# permission (see README).
mkdir -p $PKG/etc/profile.d
sed "s,@,$LIBDIRSUFFIX," $CWD/${PRGNAM}.sh > $PKG/etc/profile.d/${PRGNAM}.sh

# 20210312 bkw: help pkg-config out a bit.
sed -i '/^Libs:/s|$| -lm -Wl,-rpath,${libdir}|' \
       $PKG/opt/$PRGNAM/lib$LIBDIRSUFFIX/pkgconfig/*.pc

mkdir -p $PKG/install
sed -e "s,@API@,$API," -e "s,@JAVA@,$JAVA," \
  $CWD/slack-desc > \
  $PKG/install/slack-desc

cd $PKG
/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}