#!/bin/sh

# Slackware build script for bed

# Written by B. Watson (yalhcru@gmail.com)

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

# 20200111 bkw: Upstream site has expired and gone to meet its maker.
# 20191225 bkw: BUILD=2
# - fix builds with optional re2 dep, document optional hyperscan dep.
# - install BUGS CHANGELOG TODO in docdir.

PRGNAM=bed
VERSION=${VERSION:-3.0.0}
BUILD=${BUILD:-2}
TAG=${TAG:-_SBo}

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

CWD=$(pwd)
TMP=${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

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$VERSION
tar xvf $CWD/$PRGNAM-$VERSION.src.tar.xz
cd $PRGNAM-$VERSION

# Ships as a broken symlink... gets recreated during the build anyway.
rm -f ./plugins/mainprocedures.h

# The permissions are a bit wonky (a few executable C source files) but
# no harm done.
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 {} \+

# I found the startup message confusing, it says "Alt-X to open menu",
# where X is used in the algebra sense (to mean "whatever"). I kept
# expecting a literal Alt-X to mean "open menu", when it really means
# "exit". So:
sed -i '/Press F1 in menu/s/X/[x]/g' plugins/examples/helpf1.cc

# 20191225 bkw: build was failing on systems where re2 was installed
sed -i 's,static *string,static std::string,' src/re2search.cpp

# Not sure the --without-x does anything, but it doesn't hurt either.
CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
./configure \
  --without-x \
  --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --sysconfdir=/etc \
  --localstatedir=/var \
  --mandir=/usr/man \
  --docdir=/usr/doc/$PRGNAM-$VERSION \
  --build=$ARCH-slackware-linux

# Hardcoded -O3 here:
sed -i "s/-O3/$SLKCFLAGS/g" plugins/examples/Makefile

# Source ships pregenerated versions of these that were made on a
# cygwin system. They break the build.
rm -f src/dataproc.h src/dataprocer.h

# The Makefile hates -jN where N>1.

# The TOBUILD* stuff below is because we said
# "--build=$ARCH-slackware-linux" as usual in the ./configure
# above, and bed is expecting there to be an actual compiler called
# $ARCH-slackware-linux-cc in $PATH, which there ain't. If we were
# cross-compiling, this would have to be solved some other way.

# Regenerate the 2 headers removed above, plus one more that fails
# to be generated for whatever reason.
make -j1 -C src TOBUILDCC=gcc TOBUILDCXX=g++ OPTIM="$SLKCFLAGS" \
      dataproc.h dataprocer.h helptext.h

# *Now* we can compile for real.
make -j1 TOBUILDCC=gcc TOBUILDCXX=g++ OPTIM="$SLKCFLAGS"

# No 'install-strip' target, but the binary's installed stripped
# and the man page is gzipped already.
make -j1 install DESTDIR=$PKG

# Lot of stuff below uses this
PKGBEDLIB=$PKG/usr/lib$LIBDIRSUFFIX/$PRGNAM-$VERSION

# Replace .desktop file with cleaned-up version that passes
# desktop-file-validate. There's no icon defined in the file, nor shipped
# with bed, so I'm leaving that as-is. The desktop menu specification
# doesn't have a HexEditor or even a generic Editor category (which IMO
# is a symptom of how broken the thinking behind the specification is),
# so I had to pick between the generic System and slightly-less-generic
# Development categories...
DT=bed-binary-editor.desktop
cat $CWD/$DT > $PKG/usr/share/applications/$DT

# The rxvt stuff (rxvt.plug) doesn't get built by this script. The build
# process is too horrendous and baroque for me to spend more time trying
# to understand why. The default config file tries to load rxvt.plug and
# shows a scary but harmless "rxvt.plug: cannot open shared object file"
# error on startup, so I'm just going to disable it in the config.

# In case you're wondering, the editor's fully functional without the
# plugin. What it actually does is allows you to adjust the terminal
# bed is running in (the font size, set reverse video, and disable the
# scrollbar) from within bed. Most (all?) terminals already supply their
# own ways to do these things, so this is really extra fluff.
RC=$PKGBEDLIB/bedrc
sed -e 's/^ *plugin *rxvt\.plug/#&/' \
    -e 's/^ *menuitem  *8/#&/' \
    $RC > $RC.new
rm -f $RC

# The magic stuff for file. doinst.sh handles the rest.
mkdir -p $PKG/etc/file/magic
mv $PKGBEDLIB/bedmagic $PKG/etc/file/magic
rm -f $PKGBEDLIB/bedmagic.short $PKGBEDLIB/addmagic

# Don't want this (use removepkg instead):
rm -f $PKGBEDLIB/uninstallbed.sh

# There's still some cruft in $PKGBEDLIB (e.g. sources for the plugins),
# but it's stuff that could be considered documentation so I'll leave it.

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
chmod 644 BUGS
cp -a BUGS CHANGELOG TODO $PKG/usr/doc/$PRGNAM-$VERSION
for i in LICENSE README; do
  ln -s ../../lib$LIBDIRSUFFIX/$PRGNAM-$VERSION/$i $PKG/usr/doc/$PRGNAM-$VERSION
done
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

# 20191225 bkw: slack-desc shows optional deps. Can't use ldd for hyperscan
# as it's dynamically loaded.
RE2=no; HYPER=no
ldd $PKG/usr/bin/$PRGNAM | fgrep libre2.so && RE2=yes
strings $PKG/usr/bin/$PRGNAM | grep -q '(hyperscan) search' && HYPER=yes

mkdir -p $PKG/install
sed -e "s,@HYPER@,$HYPER," \
    -e "s,@RE2@,$RE2," \
    $CWD/slack-desc > $PKG/install/slack-desc
cat $CWD/doinst.sh > $PKG/install/doinst.sh

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