#!/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.

# 20211115 bkw:
# - updated for v0.237 on -current aka 15.0rc1.
# - new-style icons.
# - update mame.ini (lots of new options, some old ones went away).
# - include the new support stuff (hash, language, etc)
# - rename mame's 'split' to 'mame-split' to avoid potential conflict
#   with coreutils (if someone has /usr/games before /usr/bin in $PATH).
# - include ini/{examples,presets} in the package (in the doc dir).
# - make ccache work! finally! see README_ccache.txt if you care.
# - make GroovyMAME support work again (upstream switched to github).
# - remove gcc9 stuff. it was specific to Slackware 14.2.

# 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.

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

PRGNAM=mame
VERSION=${VERSION:-0.237}
BUILD=${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 [ ! -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}

# 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

# 20211112 bkw: GroovyMAME support has changed, see README_groovy.txt.
# This part of it has to run in $CWD.
GROOVY="${GROOVY:-no}"

if [ "$GROOVY" = "update" ]; then
  sh mkgroovy.sh $VERSION
  GROOVY=yes
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... and genie generates a bunch of makefiles, then runs make
# on those. Also, it uses python3 to convert XML layout files to
# C++ code.

# During the Slackware 14.2 cycle, I used to do this:
# LDOPTS="-fuse-ld=gold -static-libstdc++ -static-libgcc" \
# This allowed installing Pat's unsupported gcc9 package,
# building mame with it, then restoring the original gcc
# version and mame would still run.

# 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).

# 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' \

# 20211110 bkw: undocumented option. keep this Just In Case.
if [ "${QTDEBUG:-yes}" = "yes" ]; then
  QTOPT=1
else
  QTOPT=0
fi

# 20211112 bkw: the rest of the GroovyMAME stuff.
# The diffs look to be close to half a meg, so they're compressed.
if [ "$GROOVY" = "yes" ]; then
  GROOVYDIFF="$( /bin/ls $CWD/gm${VERSION/./}*.diff.xz 2>/dev/null | tail -1 )"
  if [ -e "$GROOVYDIFF" ]; then
    GROOVYVER="$( basename $GROOVYDIFF .diff.xz )"
    echo "=== GROOVYDIFF $GROOVYDIFF"
    echo "=== GROOVYVER $GROOVYVER"

    # The "-f -Z" is necessary to make sure the patched files end up
    # with the same timestamp every time the script is run. ccache
    # needs this because the include_file_mtime doesn't seem to
    # play nice with precompiled headers, even though it's supposed to.
    # When the patch is generated, we have to add timestamps to make
    # this work (see mkgroovy.sh for details).

    xzcat "$GROOVYDIFF" | patch -p1 -f -Z
  else
    cat <<EOF
***
GroovyMAME support was requested, but I don't have a GroovyMAME patch
for MAME $VERSION. Try running this script with GROOVY=update in the
environment, or wait a few days for the GroovyMAME author to release
an update. See README_groovy.txt for more information.
***
EOF
    exit 1
  fi
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 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).

# 20211109 bkw: N.B. upstream requires python 3, but they default to
# /usr/bin/python as the executable, so I still have to override it.
# The -S means the same thing in python3 as it did it 2: disable use
# of site packages. We needed it with py2 because otherwise the build
# would fail if PyXML happened to be installed. Probably don't need it
# with py3, but it won't hurt anything either.

# 20211111 bkw: make ccache handle precompiled headers
export CCACHE_SLOPPINESS=pch_defines,time_macros,include_file_mtime,include_file_ctime

# 20211111 bkw: undocumented option, build a mame that only supports
# pac-man and its clones. used for testing only.
if [ "${PACONLY:-no}" = "yes" ]; then
  PACOPT="SOURCES=src/mame/drivers/pacman.cpp"
fi

# 20211111 bkw: build with ccache by default, now that it works.
if [ "${USE_CCACHE:-yes}" = "yes" ]; then
  CC="/usr/bin/ccache /usr/bin/clang"
  CXX="/usr/bin/ccache /usr/bin/clang++"
else
  CC="${CC:-$( which gcc )}"
  CXX="${CXX:-$( which g++ )}"
fi

make USE_QTDEBUG=$QTOPT \
     USE_SYSTEM_LIB_EXPAT=1 \
     USE_SYSTEM_LIB_ZLIB=1 \
     USE_SYSTEM_LIB_JPEG=1 \
     USE_SYSTEM_LIB_FLAC=1 \
     PYTHON_EXECUTABLE="/usr/bin/python3 -S" \
     OPT_FLAGS="$SLKCFLAGS" \
     LDOPTS="-fuse-ld=gold" \
     OVERRIDE_CC="$CC" \
     OVERRIDE_CXX="$CXX" \
     CC="$CC" \
     CXX="$CXX" \
     ARCH="" \
     PRECOMPILE=1 \
     VERBOSE=1 \
     NOWERROR=1 \
     TOOLS=1 \
     TARGET=$PRGNAM \
     $PACOPT \
     SUBTARGET=$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.
for i in tiny 32 64; do
  [ -e ${PRGNAM}$i ] && mv ${PRGNAM}$i $PRGNAM
done

# .desktop borrowed from Ludovic Lechapt's Debian package.
cat $CWD/desktop/$PRGNAM.desktop > $PKG/usr/share/applications/$PRGNAM.desktop

# Icon extracted from src/mame/osd/windows/mame/mame.ico with icotool.
for px in 16 32 48 64 128; do
  size=${px}x${px}
  dir=$PKG/usr/share/icons/hicolor/$size/apps
  mkdir -p $dir
  convert -resize $size $CWD/desktop/$PRGNAM.png $dir/$PRGNAM.png
done

ln -s ../icons/hicolor/48x48/apps/$PRGNAM.png $PKG/usr/share/pixmaps/$PRGNAM.png

cat $CWD/$PRGNAM.ini > $PKG/etc/$PRGNAM.ini.new

# This one *must* exist.
install -s -m0755 -oroot -groot $PRGNAM $PKG/usr/games/

# 20211110 bkw: removed src2html (no longer exists) and renamed split
# to mame-split since we have a split command in coreutils already.
# Also, in case upstream drops another of these utilities, check for
# existence before trying to install (because it takes hours to
# compile).
# Install the tools:
for i in castool chdman floptool imgtool jedutil \
         ldresample ldverify nltool nlwav pngcmp \
         regrep romcmp srcclean unidasm
do
  [ -e $i ] && install -s -m0755 -oroot -groot $i $PKG/usr/games/
done

[ -e split ] && install -s -m0755 -oroot -groot $i $PKG/usr/games/$PRGNAM-split

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.
SHAREDIR=$PKG/usr/share/games/$PRGNAM
mkdir -p $SHAREDIR/{roms,font,cheat}

# Install the support stuff.
cp -a artwork bgfx plugins samples hash ctrlr $SHAREDIR

# 20211110 bkw: also the translations (but not the .po files, those are
# the sources for the .mo files, which are what mame actually needs).
cp -p --parents language/*/*.mo $SHAREDIR

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

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

# in case someone finds these useful...
cp -a ini/examples ini/presets $PKGDOC

mkdir -p $PKG/install
cat $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