#!/bin/bash

# Slackware build script for zathura

# Copyright 2010 Binh Nguyen <email removed>
# Copyright 2018 B. Watson <yalhcru@gmail.com>
# 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.

# 20180909 bkw:
# - Re-enable building with synctex, since texlive has been fixed. This
#   requires a patch, since this version of zathura was written for an
#   older version of texlive.

# 20180903 bkw:
# - Disable building with synctex, since it currently doesn't work due
#   to a bug in the texlive package. Will be re-enabled when the texlive
#   issue is fixed.
# - Really get rid of color output from the Makefile. I know it's cute,
#   but it confuses less when redirecting to a file.

# 20180102 bkw:
# - Updated for v0.3.8. Have to do some fudging to get it to build with
#   Slack 14.2's older glib2: upstream claims they need 2.50, but the
#   only thing they seem to need it for is the --dependency-file option
#   to glib-compile-resources, which turns out to be unneeded.

# 20170711 bkw:
# - BUILD=2
# - Include API docs in package
# - Switch to github URLs since upstream's site has been broken for 3-4
#   days now. Side effect is, it makes it easier for my update script to
#   let me know when there's a new release. This means adding the built
#   man pages to SBo git (otherwise I'd have Sphinx as a dep, yuck).

# 20170125 bkw:
# - Updated for v0.3.7, poppler plugin v0.2.7

# 20160725 bkw:
# - Updated for v0.3.6

# 20150511 bkw:
# - Version bump 0.3.3. The poppler plugin is still on 0.2.5.
# - Make the poppler plugin's pdf.so a symlink. Will do the same
#   for zathura-pdf-mupdf, to allow switching between the two without
#   reinstalling packages. This wouldn't have worked with older versions,
#   due to changes in glib's g_file_test() between glib 1.x and 2.x.
# - Upstream started using -fdiagnostics-color=always, which is only
#   supported in newer gcc versions. Get rid of it.

# Updated 20130617 by B. Watson <yalhcru@gmail.com>:
# - Updated for v0.2.3

# Updated 20120721 by B. Watson <yalhcru@gmail.com>:
# - Updated for v0.2.0
# - generated man pages now included by upstream, get rid of ours

# Updated 20120312 by B. Watson <yalhcru@gmail.com>:
# - Updated for v0.1.1, including poppler plugin
# - Restore missing .desktop file and AUTHORS doc
# - Add an icon
# - Include generated man pages
# - fix homepage URL

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

PRGNAM=zathura
VERSION=${VERSION:-0.3.8}
BUILD=${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 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 "${PRINT_PACKAGE_NAME}" ]; then
  echo "$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 -eu

# zathura no longer includes PDF support in the core. Instead it uses
# plugins. This build includes the default PDF plugin, without which zathura
# is completely useless.
PLUGIN=$PRGNAM-pdf-poppler
PLUGINVER=${PLUGINVER:-0.2.8}

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 {} \+

# Work around a bug in Slackware's ghostscript.
# http://bugs.ghostscript.com/show_bug.cgi?id=692891
#
# Supposedly this was fixed, but I'm getting stack traces that look just
# like those. The trouble is, if any of the plugins depends on libgs.so,
# that library gets loaded during zathura's "scan for plugins" phase.
# If libjpeg.so wasn't already loaded, it gets loaded and mangled by
# libgs. This happens *before* zathura knows which plugin matches the file
# we're trying to view. Now, the plugin is chosen based on the file's
# mime type. If said plugin *isn't* the one using libgs, but it *does*
# use libjpeg, *boom* segfault.
#
# What I found is that the postscript plugin uses libsceptre, which uses
# libgs... and the mupdf and comicbook plugins use libjpeg.  The end result
# is that the mupdf and cb plugins crash the first time they try to load
# a jpeg from the pdf/cbr, *but* only if the ps plugin is installed!
# Both plugins work fine if the ps plugin is removed.
#
# I found that 'export LD_PRELOAD=/usr/lib/libjpeg.so' stops the
# segfaulting, while not affecting the ps plugin. The patch below is
# basically just the C equivalent: use dlopen() to load libjpeg.so before
# scanning for plugins. Yes, it's a hack, that depends on implementation
# specific details, but the alternative would be to try and talk Pat V
# into patching and rebuilding his ghostscript and/or libsceptre packages,
# which he won't be doing this late in the release cycle (I wouldn't either).

patch -p1 < $CWD/dlopen_hack.diff

# synctex API in recent texlive has changed from whatever version
# zathura was developed with. This is a monkey patch, with me as
# the monkey: monkey see someone else's patch for something else here:
# https://bugs.debian.org/cgi-bin/bugreport.cgi?att=1;bug=896566;filename=synctex2;msg=10
# ...and monkey do the same thing to zathura.
# A while after I did this, I found someone else's patch:
# http://pk.archive.ubuntu.com/ubuntu/ubuntu/pool/universe/z/zathura/zathura_0.3.9-2.debian.tar.xz
# ...the portion of the patch that alters synctex.c looks identical to
# the one I came up with, meaning I could have saved myself some work...
patch -p1 < $CWD/synctex_fix.diff

sed -i "s/-pedantic/$SLKCFLAGS/" config.mk
sed -i '/--dependency-file/d' Makefile

# 20170711 bkw: git tarballs don't include prebuilt man pages, and I do NOT
# want Sphinx and its 15+ deps as a dep for this build. So:
cp -r $CWD/man doc/_build

make \
  LIBDIR=/usr/lib$LIBDIRSUFFIX \
  MANPREFIX=/usr/man \
  DESTDIR=$PKG \
  RSTTOMAN="" \
  COLOR=0 \
  GLIB_VERSION_CHECK=0 \
  VERBOSE=1 \
  all \
  install

# Check & see if synctex was built in, for slack-desc purposes.
WITH=WITHOUT
if ldd $PKG/usr/bin/$PRGNAM | grep -q libsynctex; then
  WITH=WITH
fi

gzip $PKG/usr/man/man?/*.?

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a AUTHORS LICENSE README $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

# Include the API docs. Sphinx would be needed to build HTML or PDF docs, but
# the doc sources are RST, which are perfectly human-readable already (though
# less easy to navigate).
cd doc
rm -rf installation man _build [A-Z]* *.mk *.py *.txt
cp -a * $PKG/usr/doc/$PRGNAM-$VERSION

# Now build the plugin.
cd $TMP

# Hack, lets #include <zathura/document.h> in pdf.h work with an uninstalled
# copy of zathura by saying "-I../zathura"
rm -f $PRGNAM
ln -s $PRGNAM-$VERSION $PRGNAM

rm -rf $PLUGIN-$PLUGINVER
tar xvf $CWD/$PLUGIN-$PLUGINVER.tar.gz
cd $PLUGIN-$PLUGINVER
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 {} \+

# ZATHURA_VERSION_CHECK=0 is required because zathura.pc isn't installed.

PLUGDIR=/usr/lib$LIBDIRSUFFIX/$PRGNAM
sed -i "s/-fPIC/$SLKCFLAGS/" config.mk
make install \
  VERBOSE=1 \
  ZATHURA_INC=-I../zathura \
  PLUGINDIR=$PLUGDIR/pdf-poppler \
  DESTDIR=$PKG \
  ZATHURA_GTK_VERSION=3 \
  ZATHURA_VERSION_CHECK=0
strip $PKG/$PLUGDIR/pdf-poppler/*.so

ln -s pdf-poppler/pdf.so $PKG/$PLUGDIR/pdf.so

# icon converted from https://pwmt.org/img/fav.ico
mkdir -p $PKG/usr/share/pixmaps
cat $CWD/$PRGNAM.png > $PKG/usr/share/pixmaps/$PRGNAM.png
echo "Icon=$PRGNAM" >> $PKG/usr/share/applications/$PRGNAM.desktop

mkdir -p $PKG/install
sed "s,@WITH@,$WITH," $CWD/slack-desc > $PKG/install/slack-desc
cat $CWD/doinst.sh > $PKG/install/doinst.sh

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