#!/bin/sh

# Slackware build script for gnome-session

# Copyright 2016, 2021 Rafael Tavares (mdrafaeltavares@gmail.com) Bahia, Brazil.
# Based on Gentoo ebuild script:
# https://gitweb.gentoo.org/repo/gentoo.git/tree/gnome-base/gnome-session/gnome-session-40.1.1.ebuild
# Special thanks for all the clarity and files. Without them this would not be possible.
# Based on Linux From Scratch online book (Thanks sooo much for all!):
# https://www.linuxfromscratch.org/blfs/view/svn/gnome/gnome-session.html
# 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.

PRGNAM=$(basename $0 | cut -f1 -d.)
VERSION=${VERSION:-$(find . -maxdepth 1 -name "$PRGNAM-*.tar.?z*" | rev | cut -f 3- -d . | cut -f 1 -d - | rev)}
BUILD=${BUILD:-1}
TAG=${TAG:-_gfs}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i486 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi

CWD=$(pwd)
TMP=${TMP:-/tmp/gfs}
PKG=$TMP/pkg-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}
JOBS=${JOBS:-" -j$(expr $(getconf _NPROCESSORS_ONLN) \* 2 ) "}

if [ "$ARCH" = "i486" ]; then
  SLKCFLAGS="-O2 -march=i486 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$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

UMASKBKP=$(umask)
umask 0022

DEPCHK=""
OPTDEP=""

if [ -z $VERSION ]
 then
 VERSION=40.1.1
fi

MDSCHK=4fe52c247137b0c9329ca4ddfe9f0070
DWNLCMD=${DWNLCMD:-"wget -c --no-check-certificate"}
SRCDOWN=${SRCDOWN:-"https://download.gnome.org/sources/$PRGNAM/$(echo $VERSION | cut -f1 -d.)/$PRGNAM-$VERSION.tar.xz"}

if [ -z $(find . -maxdepth 1 -name "$PRGNAM-$VERSION.tar.?z*") ]
then
 $DWNLCMD $SRCDOWN
else
 if md5sum -c <<<"$MDSCHK $(echo $PRGNAM-$VERSION.tar.?z*)";
  then
   continue
  else
   rm -rf $PRGNAM-$VERSION.tar.?z*
   $DWNLCMD $SRCDOWN
 fi
fi

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$VERSION
tar xfv $CWD/$PRGNAM-$VERSION.tar.?z*
cd $PRGNAM-$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 {} \;

# Make gnome-session use a login shell
# sed 's@/bin/sh@/bin/sh -l@' -i gnome-session/gnome-session.in

# Adapt meson.build so that gnome-session can build without systemd:
# sed -i "/  systemd_dep/,+3d;/if enable_systemd/a \    systemd_userunitdir = '/tmp\'" meson.build

patch -p1 -i $CWD/files/gnome-session-3.38.0-meson-Support-elogind.patch

mkdir -p build
cd build

CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
meson .. \
 --prefix=/usr \
 --buildtype=release \
 --libdir=lib${LIBDIRSUFFIX} \
 --sysconfdir=/etc \
 --infodir=/usr/info \
 --mandir=/usr/man \
 --localstatedir=/var \
 -Dsystemd=false \
 -Delogind=true \
 -Dsystemd_journal=false \
 -Dsystemd_session=disable \
 -Ddefault_library=shared \
 -Dsession_selector=true \
 -Dconsolekit=false \
 -Ddocbook=true \
 -Dman=true

# -Ddeprecation_flags=false \

ninja $JOBS || ninja
DESTDIR=$PKG ninja install

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

find $PKG/usr/man -type f -exec gzip -9 {} \;
for i in $( find $PKG/usr/man -type l ) ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done

cd ..
mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a AUTHORS COPYING ChangeLog* HACKING MAINTAINERS NEWS README \
  $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/$(basename $0) > $PKG/usr/doc/$PRGNAM-$VERSION/$(basename $0)

mkdir -p $PKG/etc/X11/Sessions
cat $CWD/files/Gnome > $PKG/etc/X11/Sessions/Gnome
cat $CWD/files/defaults.list-r5 > $PKG/etc/X11/Sessions/gnome-mimeapps.list

# I don't know if its needed on Slackware, but in doubt...
mkdir -p $PKG/etc/X11/xinit/xinitrc.d
cat $CWD/files/15-xdg-data-gnome-r1 > $PKG/etc/X11/xinit/xinitrc.d/15-xdg-data-gnome
cat $CWD/files/10-user-dirs-update-gnome-r1 > $PKG/etc/X11/xinit/xinitrc.d/10-user-dirs-update-gnome
cat $CWD/files/90-xcursor-theme-gnome > $PKG/etc/X11/xinit/xinitrc.d/90-xcursor-theme-gnome

mkdir -p $PKG/install
#      |-----handy-ruler------------------------------------------------------|
cat <<EOT >$PKG/install/slack-desc
$PRGNAM:
$PRGNAM: GNOME Session
$PRGNAM:
$PRGNAM: gnome-session contains the GNOME session manager, as well as a
$PRGNAM: configuration program to choose applications starting on login.
$PRGNAM:
$PRGNAM:
$PRGNAM:
$PRGNAM:
$PRGNAM: https://wiki.gnome.org/Projects/SessionManagement
$PRGNAM:
EOT

cat <<\EOT >$PKG/install/doinst.sh
if [ -x /usr/bin/update-mime-database ]; then
  /usr/bin/update-mime-database /usr/share/mime &> /dev/null
fi

if [ -x /usr/bin/update-desktop-database ]; then
  /usr/bin/update-desktop-database -q usr/share/applications >/dev/null 2>&1
fi

if [ -e usr/share/icons/hicolor/icon-theme.cache ]; then
  if [ -x /usr/bin/gtk-update-icon-cache ]; then
    /usr/bin/gtk-update-icon-cache usr/share/icons/hicolor >/dev/null 2>&1
  fi
fi

if [ -e usr/share/glib-2.0/schemas ]; then
  if [ -x /usr/bin/glib-compile-schemas ]; then
    /usr/bin/glib-compile-schemas usr/share/glib-2.0/schemas >/dev/null 2>&1
  fi
fi
EOT

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

umask ${UMASKBKP}