#!/bin/bash

# Slackware build script for mozjpeg

# Originally written by Ryan P.C. McQuen
# Now maintained by B. Watson (urchlay@slackware.uk)

# Licensed under the WTFPL. See http://www.wtfpl.net/txt/copying/ for details.

# 20230710 bkw:
# - update for v4.1.3.
# - fail if API in env is bad (not blank, 6b, 7, or 8).
# - add zulu-openjdk11 and 17 to JDK search.
# - fail if JAVA=yes but we can't find a JDK.

# 20230105 bkw: update for v4.1.1, fix doc symlink.
# 20220318 bkw: fix 32-bit lib vs. lib32 install path mess.
# 20210909 bkw: relicense as WTFPL, w/permission from original author.

# 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

cd $(dirname $0) ; CWD=$(pwd)

PRGNAM=mozjpeg
VERSION=${VERSION:-4.1.3}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}
PKGTYPE=${PKGTYPE:-tgz}

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

if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
  exit 0
fi

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

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$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

ARGS=""

# 20230710 bkw: sanity-check the API environment variable.
API="${API:-6b}"
case "$API" in
  6b) ARGS="" ;;  # this is the default.
   7) ARGS="-DWITH_JPEG7=TRUE " ;;
   8) ARGS="-DWITH_JPEG8=TRUE " ;;
   *) echo "*** $0: invalid API. must be one of: 6b (default), 7, 8."
      exit 1 ;;
esac

# 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="${JAVA:-no}"
javafound=no
if [ "$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 zulu-openjdk{6,8,11,17}; do
    if [ -x /etc/profile.d/$i.sh ]; then
      javafound="$i"
      source /etc/profile.d/$i.sh
      break
    fi
  done
  if [ "$javafound" = "no" ]; then
    echo "*** $0: you set JAVA=yes, but I can't find a JDK to build with"
    exit 1
  fi
  javafound="yes ($javafound)"
fi

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 {} \+

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 ..

# Grr.
if [ -e $PKG/opt/$PRGNAM/lib32 ]; then
  cd $PKG/opt/$PRGNAM
  mv lib32 lib
  ln -s lib lib32
  cd -
fi

# 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@,$javafound," \
  $CWD/slack-desc > \
  $PKG/install/slack-desc

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