#!/bin/bash

# Slackware build script for JSBsim

# Copyright 2023 Brian Hoffpauir, 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)

PRGNAM=JSBSim
SRCNAM=${PRGNAM,,}
VERSION=${VERSION:-1.1.13}
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 [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
elif [ "$ARCH" = "aarch64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

set -e

# OPTIONS
# Build using Slackware's l/expat XML parsing library (default to ON)
SYSTEM_EXPAT=${SYSTEM_EXPAT:-ON}
# Share library between Python module and JSBSim executable (default to ON)
# Otherwise build a static library.
BUILD_SHARED_LIBS=${BUILD_SHARED_LIBS:-ON}
# Build C++ API documentation (default to OFF; requires Doxygen and Graphviz)
BUILD_DOCS=${BUILD_DOCS:-OFF}
# This option is used for both build & install CMake cache variables
BUILD_PYTHON_MODULE=${BUILD_PYTHON_MODULE:-ON} # (default to ON)
# Ensure appropriate Python version 3 executable is used; can be overridden if needed
PYTHON_EXECUTABLE=${PYTHON_EXECUTABLE:-"$(which python3)"}

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

mkdir -p build
cd build
  cmake -G "Unix Makefiles" \
		-DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
		-DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS" \
		-DCMAKE_INSTALL_PREFIX=/usr \
		-DCMAKE_BUILD_TYPE=Release \
		-DPYTHON_EXECUTABLE="$PYTHON_EXECUTABLE" \
		-DSYSTEM_EXPAT="$SYSTEM_EXPAT" \
		-DBUILD_SHARED_LIBS="$BUILD_SHARED_LIBS" \
		-DBUILD_DOCS="$BUILD_DOCS" \
		-DBUILD_PYTHON_MODULE="$BUILD_PYTHON_MODULE" \
		-DINSTALL_JSBSIM_PYTHON_MODULE="$BUILD_PYTHON_MODULE" ..
  make
  make install/strip DESTDIR=$PKG
cd ..

rm -f $PKG/{,usr/}lib${LIBDIRSUFFIX}/*.la

# JSBSim's CMake setup does not support GNUInstallDirs or a LIB_SUFFIX cache variable.
# If a library directory suffix is set, move the libraries to that directory.
if [ -n "$LIBDIRSUFFIX" ]; then
  # Create /usr/lib64/ and /usr/lib64/pkgconfig
  mkdir -p $PKG/usr/lib${LIBDIRSUFFIX}/{,pkgconfig}
  # Move libAeromatic++ and libJSBSim
  mv $PKG/usr/lib/libAeromatic++.* $PKG/usr/lib${LIBDIRSUFFIX}/
  mv $PKG/usr/lib/libJSBSim.* $PKG/usr/lib${LIBDIRSUFFIX}/
  mv $PKG/usr/lib/pkgconfig/JSBSim.pc $PKG/usr/lib${LIBDIRSUFFIX}/pkgconfig
  # Set correct library directory in libJSBSim's pkgconfig:
  sed -i "s|libdir=/usr/lib|libdir=/usr/lib${LIBDIRSUFFIX}|" \
  $PKG/usr/lib${LIBDIRSUFFIX}/pkgconfig/JSBSim.pc &>> /dev/null
  # Remove possibly empty directories
  rmdir --ignore-fail-on-non-empty \
    $PKG/usr/lib/pkgconfig/ \
    $PKG/usr/lib
fi

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

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
# Copy repo docs and sample aircraft data
cp -a \
   README.md \
   COPYING \
   AUTHORS \
   doc/DevelopersDocs.md \
   doc/spreadsheets/ \
   examples/ \
   aircraft/ \
   engine/ \
   systems/ \
   scripts/ \
   $PKG/usr/doc/$PRGNAM-$VERSION

if [[ "${BUILD_DOCS,,}" = "on" ]]; then # Also copy Doxygen output if built
  cp -a \
    build/documentation/html/ \
    $PKG/usr/doc/$PRGNAM-$VERSION
fi
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

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

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