#!/bin/bash

# Slackware build script for mame

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

# Adapted from Erik W. Hanson's mame.SlackBuild for older mame versions,
# which was originally adapted from sdlmame.SlackBuild by B. Watson.

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

# 20191208 bkw: Updated for v0.214, after long hiatus. This isn't
# actually the latest version, but it's the latest version that will
# compile with any of the compilers available in Slackware 14.2:
# gcc-5.5.0, llvm-3.8.0, llvm-8.0.1 (from /extra). It may still be
# possible to patch 0.216 to build, or possibly 0.217 will have a fix for
# llvm-8.0.1 (mame docs claim to support "clang version 5 and later").
# Meanwhile this update is better than nothing. Special thanks for ponce
# and chriswilling for doing test builds on much faster machines than
# I currently have access to. Also, moved old comment log entries to
# ChangeLog.old as it was getting ridiculously long.

# 20181227 bkw: Updated for v0.205.
# 20181130 bkw: Updated for v0.204, including compile fix for xavix.cpp.
# 20181031 bkw: Updated for v0.203.
# 20180928 bkw: Updated for v0.202.
# 20180830 bkw: Updated for v0.201.

PRGNAM=mame
VERSION=${VERSION:-0.214}
BUILD=${BUILD:-1}
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}

# NB nonstandard flags here. Upstream defaults to -O3, so we'll leave
# that as-is. Only the arch-specific stuff goes here.
if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-march=i686 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-fPIC"
  LIBDIRSUFFIX="64"
else
  SLKCFLAGS=""
  LIBDIRSUFFIX=""
fi

# Source extracts to e.g. mame-mame0175/
SHORTNAME=${PRGNAM}${VERSION/./}
DIRNAME=$PRGNAM-$SHORTNAME

set -e

# 20200108 bkw: before doing ANYTHING else, check to make sure
# our required deps are installed. This is helpful because if
# they are missing, the mame compile will still start and run
# for an hour or more before it errors out, wasting a lot of
# time (some of which was mine).
MISSING=""
for i in sdl2 SDL2_ttf; do
  pkg-config --exists $i || MISSING="$MISSING $i"
done
if [ -n "$MISSING" ]; then
  echo "*** Missing required dependencies:$MISSING" 1>&2
  exit 1
fi

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $DIRNAME
tar xvf $CWD/$DIRNAME.tar.gz
cd $DIRNAME
chown -R root:root .

# 20181201 bkw: Urchlay's personal template:
find -L .  -perm /111 -a \! -perm 755 -a -exec chmod 755 {} \+ -o \
        \! -perm /111 -a \! -perm 644 -a -exec chmod 644 {} \+

# OK, building modern mame is a bit of a PITA. It uses genie (written
# in lua, a fork of premake), but you don't get to run genie directly,
# you got a main makefile that builds lua, then builds genie, then runs
# genie with arguments based on the options in the main makefile. Also,
# it uses python to convert XML layout files to C++ code.

# Where possible, use system libraries instead of building the ones
# bundled with the mame source. However, SBo's lua is (still!) too old
# for mame.
#USE_SYSTEM_LIB_LUA=1 \

# Upstream dropped sqlite as a dependency, this no longer matters.
#USE_SYSTEM_LIB_SQLITE3=1 \

# Not going to USE_SYSTEM_LIB_PORTAUDIO or USE_SYSTEM_LIB_PORTMIDI,
# the bundled versions are fine and I don't want a mile-long dependency
# tree. Using an external portmidi dep would make mame require Oracle's
# JDK! In case you're wondering, only the C code in the bundled portmidi
# is built (no Java needed).

# The OVERRIDE_CC and OVERRIDE_CXX are there because mame's build
# ignores $PATH when searching for gcc/g++, and won't find my ccache
# symlinks in /usr/local/bin. On a normal (non-ccache-using) system,
# these options do nothing (they use the compilers in /usr/bin, which
# is the default anyway) and you can forget about them... or, if you use
# distcc, this will allow it to actually work. (Mini-rant: PATH has been
# a standard mechanism on both Unix and DOS/Windows systems for what,
# 30 or 40 years now? Come on people...)

# Version-specific patches & sed fixes. We do it this way to keep this
# script compatible with older versions.
PATCHES=""
case "$VERSION" in
  0.200) # couple files missing an include...
    sed -i '1i#include <cmath>' \
           src/devices/cpu/mips/ps2vif1.cpp \
           src/devices/cpu/mips/mips3.cpp
           ;;
  0.204)
    sed -i '1i#include <cmath>' src/mame/video/xavix.cpp
    ;;
  *) ;;
esac

[ -n "$PATCHES" ] && \
  for i in "$PATCHES"; do
    [ -f "$CWD/$i" ] && patch -p1 < "$CWD/$i"
  done

# This is purely cosmetic, and can't be set on the make command line.
sed -i 's,ubuntu-intrepid,slackware,g' scripts/genie.lua
sed -i 's/DISTRO := generic/DISTRO := slackware/' makefile

# SDL_INI_PATH needs to contain a $ character. I haven't figured out
# how (or even if) I can pass this through multiple layers of make
# calling genie which calls make again, so screw it:
sed -i 's,\.;ini,/etc,' src/osd/sdl/sdlmain.cpp

# Tried several variants of this, none work, ended up using the sed
# stuff above.
#SDL_INI_PATH='$$HOME/.mame;/etc' \

# Previous versions of mame used qt4 for the debugger GUI. Now it's
# qt5, so I've made it optional (Slackware 14.2 still only has qt4).
if [ "${QTDEBUG:-no}" = "yes" ]; then
  QTOPT=1
  WITHQT="with"
else
  QTOPT=0
  WITHQT="without"
fi

# Now, let's check for GroovyMAME. All the user has to do is place
# the .diff in the SlackBuild's directory. The filename always starts
# with the MAME version number, minus its dots. If we find multiple
# files matching this, sort them lexically and use the last (hopefully
# this is the one with the highest version number).
GROOVYDIFF="$( ls $CWD/${VERSION/./}_groovymame_*.diff 2>/dev/null | tail -1 )"
if [ -e "$GROOVYDIFF" ]; then
  GROOVYVER="$( basename $GROOVYDIFF .diff | cut -d_ -f3- | sed 's,-,_,g' )"

  # .diffs are shipped with CRLF endings, fix:
  sed 's,\r,,g' "$GROOVYDIFF" > groovy.diff

  patch -p0 < groovy.diff

  echo "GROOVYDIFF $GROOVYDIFF"
  echo "GROOVYVER $GROOVYVER"
fi

# Build option notes:

# Having ARCH set in the env will break the build, hence ARCH="".

# Using ld.gold is *much* faster, and I see no disadvantage to it.

# The static libstdc++ and libgcc args allow building a version of mame
# that requires gcc9 (README_gcc9.txt), then running it on a system that
# doesn't have gcc9 installed. This does make the binary slightly larger,
# but it's already around 250MB so it's not going to matter much.

# The point of the OVERRIDE_CC and friends is to make the build use $PATH
# to find gcc (so ccache will be found if it's using the symlink method).

make USE_QTDEBUG=$QTOPT \
     USE_SYSTEM_LIB_EXPAT=1 \
     USE_SYSTEM_LIB_ZLIB=1 \
     USE_SYSTEM_LIB_JPEG=1 \
     USE_SYSTEM_LIB_FLAC=1 \
     PYTHON_EXECUTABLE="/usr/bin/python -S" \
     OPT_FLAGS="$SLKCFLAGS" \
     LDOPTS="-fuse-ld=gold -static-libstdc++ -static-libgcc" \
     OVERRIDE_CC="$( which gcc )" \
     OVERRIDE_CXX="$( which g++ )" \
     CC="$( which gcc )" \
     CXX="$( which g++ )" \
     ARCH="" \
     VERBOSE=1 \
     NOWERROR=1 \
     TOOLS=1 \
     TARGET=$PRGNAM \
     SUBTARGET=$PRGNAM

# No 'make install' target, do it manually.
mkdir -p $PKG/usr/games $PKG/etc $PKG/usr/man/man6 $PKG/usr/man/man1 \
         $PKG/usr/share/applications $PKG/usr/share/pixmaps

# Deal with upstream's executable-naming silliness.
[ -e ${PRGNAM}64 ] && mv ${PRGNAM}64 $PRGNAM
[ -e ${PRGNAM}32 ] && mv ${PRGNAM}32 $PRGNAM

# .desktop borrowed from Ludovic Lechapt's Debian package.
# Icon extracted from src/mame/osd/windows/mame/mame.ico with icotool.
cat $CWD/desktop/$PRGNAM.desktop > $PKG/usr/share/applications/$PRGNAM.desktop
cat $CWD/desktop/$PRGNAM.png > $PKG/usr/share/pixmaps/$PRGNAM.png
cat $CWD/$PRGNAM.ini > $PKG/etc/$PRGNAM.ini.new

# Install the binaries:
install -s -m0755 -oroot -groot \
  $PRGNAM castool chdman floptool imgtool jedutil \
  ldresample ldverify nltool nlwav pngcmp regrep \
  romcmp split src2html srcclean unidasm \
  $PKG/usr/games/

ln -s $PRGNAM $PKG/usr/games/mess

# Install the man pages. mame and mess still have separate man
# pages, though the binaries are combined now.
install -m0644 -oroot -groot docs/man/*.1 $PKG/usr/man/man1
install -m0644 -oroot -groot docs/man/*.6 $PKG/usr/man/man6
gzip -9 $PKG/usr/man/man?/*.?

# Create empty dirs for the user to populate with ROMs and such.
for i in roms samples ctrlr font cheat; do
  mkdir -p $PKG/usr/share/games/$PRGNAM/$i
done

# Install the artwork and bgfx stuff (needed for 'video bgfx' in mame.ini).
cp -a artwork bgfx $PKG/usr/share/games/$PRGNAM

# CONTRIBUTING.md is a 1-byte placeholder, and we don't need a shell script.
rm -f docs/CONTRIBUTING.md docs/update.sh

mkdir -p $PKG/usr/doc/${PRGNAM}-$VERSION
# can't just "cp docs/* ..." because man/ is a dir, set -e kills the script
cp docs/L* docs/*.* $PKG/usr/doc/${PRGNAM}-$VERSION
cp -a docs/swlist $PKG/usr/doc/${PRGNAM}-$VERSION
cat $CWD/${PRGNAM}.SlackBuild > $PKG/usr/doc/${PRGNAM}-$VERSION/${PRGNAM}.SlackBuild

mkdir -p $PKG/install
sed "s,@WITHQT@,$WITHQT," $CWD/slack-desc > $PKG/install/slack-desc

[ -n "$GROOVYVER" ] && \
  sed -i "19s,\$, This package was patched with GroovyMAME $GROOVYVER.," \
  $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:-tgz}