#!/bin/bash

# Slackware build script for kmod

# Copyright 2011-2016  Robby Workman, Tuscaloosa, Alabama, USA
# Copyright 2013-2020  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=kmod
VERSION=${VERSION:-33}
BUILD=${BUILD:-1}

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

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

if [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=pentium4 -mtune=generic"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -march=x86-64 -mtune=generic -fPIC"
  LIBDIRSUFFIX="64"
elif [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
else
  SLKCFLAGS=${SLKCFLAGS:-"-O2"}
  LIBDIRSUFFIX=${LIBDIRSUFFIX:-""}
fi

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PKGNAM-$VERSION
tar xvf $CWD/$PKGNAM-$VERSION.tar.?z || exit 1
cd $PKGNAM-$VERSION || 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 {} \+

# Fix paths in manual pages
sed -i "s,/usr/lib,/lib,g" man/*

CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --libdir=/lib${LIBDIRSUFFIX} \
  --bindir=/sbin \
  --sbindir=/sbin \
  --sysconfdir=/etc \
  --localstatedir=/var \
  --mandir=/usr/man \
  --docdir=/usr/doc/$PKGNAM-$VERSION \
  --with-openssl \
  --with-xz \
  --with-zlib \
  --with-zstd \
  --build=$ARCH-slackware-linux || exit 1

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

# "make clean" deletes too much, so we have to start fresh :(

cd $TMP
rm -rf $PKGNAM-$VERSION
tar xvf $CWD/$PKGNAM-$VERSION.tar.?z || exit 1
cd $PKGNAM-$VERSION || 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 {} \+

# Fix paths in manual pages
sed -i "s,/usr/lib,/lib,g" man/*

## We aren't including python bindings unless something needs them...
## Build python3 bindings for libkmod
#CFLAGS="$SLKCFLAGS" \
#CXXFLAGS="$SLKCFLAGS" \
#PYTHON=python3 \
#./configure \
#  --prefix=/usr \
#  --libdir=/lib${LIBDIRSUFFIX} \
#  --bindir=/sbin \
#  --sbindir=/sbin \
#  --sysconfdir=/etc \
#  --localstatedir=/var \
#  --mandir=/usr/man \
#  --docdir=/usr/doc/$PKGNAM-$VERSION \
#  --with-openssl \
#  --with-xz \
#  --with-zlib \
#  --with-zstd \
#  --build=$ARCH-slackware-linux || exit 1
#
#make \
#  $NUMJOBS \
#  install-pkgpyexecLTLIBRARIES \
#  install-dist_pkgpyexecPYTHON \
#  DESTDIR=$PKG || exit 1

# Strip binaries:
( cd $PKG
  find . | xargs file | grep "executable" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null
  find . | xargs file | grep "shared object" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null
)

# Compress and link manpages, if any:
if [ -d $PKG/usr/man ]; then
  ( cd $PKG/usr/man
    for manpagedir in $(find . -type d -name "man*") ; do
      ( cd $manpagedir
        for eachpage in $( find . -type l -maxdepth 1) ; do
          ln -s $( readlink $eachpage ).gz $eachpage.gz
          rm $eachpage
        done
        gzip -9 *.?
      )
    done
  )
fi

# Create symlinks for the usual module-init-tools stuff:
( cd $PKG/sbin
  for file in depmod insmod lsmod modinfo modprobe rmmod ; do
    ln -sf kmod $file
  done
)

# Link lsmod into /bin
mkdir -p $PKG/bin
( cd $PKG/bin ; ln -sf /sbin/lsmod . )

mkdir -p $PKG/etc/modprobe.d
mkdir -p $PKG/usr/lib${LIBDIRSUFFIX}
mv $PKG/lib${LIBDIRSUFFIX}/pkgconfig $PKG/usr/lib${LIBDIRSUFFIX}
rm -f $PKG/lib${LIBDIRSUFFIX}/{*.so,*.la}
( cd $PKG/usr/lib${LIBDIRSUFFIX}
  ln -sf ../../lib${LIBDIRSUFFIX}/libkmod.so.? libkmod.so
)

mkdir -p $PKG/usr/doc/$PKGNAM-$VERSION
cp -a \
  COPYING* NEWS README* TODO \
  $PKG/usr/doc/$PKGNAM-$VERSION

# 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 $PKG/usr/doc/${PKGNAM}-$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

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