#!/bin/bash

# Slackware build script for adl

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

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

# 93 (1993) is the timestamp of the tarball. Most of the files
# inside are stamped May 10 1991, and the copyright notice
# says 1987.

# In case anyone's wondering: compiled ADL files are NOT architecture
# independent. 32-bit adlcomp produces files that won't run on a 64-bit
# adlrun, and vice versa.

# 20180122 bkw: It turns out that adl development continued up
# through 2011, with a Windows and Linux binary release in 2003.
# The ADL language and bytecode formats were changed for the 2003
# binary release, and changed again afterwards. For maximum
# compatibility, I'm now including 3 versions of adl in the package.
# If the code in this script hurts your head, don't feel too bad,
# mine's aching right now.

# 20170621 bkw: add -j1 to the make commands. I got a mysterious
# build failure that I couldn't duplicate, hopefully this fixes it.

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

PRGNAM=adl
VERSION=${VERSION:-20110628}
BUILD=${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

TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

BITS=32
if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  BITS="64"
else
  SLKCFLAGS="-O2"
fi

set -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM
mkdir -p $PRGNAM
cd $PRGNAM

### First, the old 19930322 version, installed as adl93.
YEAR=93
tar xvf $CWD/$PRGNAM.tar.Z
cd $PRGNAM
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 {} \;

# Patch does this:
# - fix various compile errors (mostly relating to lack of ANSI prototypes).
# - remove 'extern char *malloc()' and such, include system headers instead.
# - add support for OPTFLAGS (instead of hard-coded -O in CFLAGS).
# - -DADL_NAME="/usr/games/adlrun93" (for adlcomp's emitted shebang lines).
# - stop adlrun from opening game files read/write: it never writes to them,
#   and the open fails for e.g. non-root user trying to run /usr/games/aard.
patch -p1 < $CWD/compilefixes$YEAR.diff

# 'make install' doesn't create directories.
mkdir -p $PKG/usr/games $PKG/usr/man/man6

make -j1 all install BIN=$PKG/usr/games OPTFLAGS="$SLKCFLAGS"

# the adltouch utility is broken, don't include in package.
# adldebug also seems like it might be broken, but it might just be that
# I'm using it wrong.
rm -f $PKG/usr/games/adltouch

# a couple of the samples are complete games, let's install them.
cp -a samples/aard/aard samples/mpu/mpu $PKG/usr/games

# we're going to install samples/ in /usr/doc, but not the compiled games.
make -j1 -C samples clean

# use reconstituted man pages instead of the preformatted ones in the
# source. See fixman.sh.
# Even though we're shipping 3 versions of adl, there's only one set
# of man pages because nobody ever updated them.
for page in $CWD/man/*.6; do
  gzip -9c < $page > $PKG/usr/man/man6/$( basename $page ).gz
done

DOCDIR=$PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM$YEAR
mkdir -p $DOCDIR
# rename this so no GUIs think it's a MS Word doc:
cp -a man/adl.doc $DOCDIR/adl.doc.txt
cp -a copyrigh readme samples $DOCDIR

# rename everything
for bin in adlcomp adlrun adldebug; do
  mv $PKG/usr/games/$bin $PKG/usr/games/$bin$YEAR
  ln -s $bin.6.gz $PKG/usr/man/man6/$bin$YEAR.6.gz
done

### Next, the 2003 binary-only release. No man pages, almost no docs,
#   and don't install compiled sample games. The "64-bit" binaries are
#   actually statified (static) 32-bit, which MUST NOT be stripped!
#   AFAICT, this is the most commonly used version in the ADL community,
#   so these get symlinked to the bare names (adlrun03 => adlrun).
YEAR=03
cd $TMP/$PRGNAM
tar xvf $CWD/${PRGNAM}_linux${BITS}_1_0.tar.gz
cd ADL_linux${BITS}_1_0
chown -R root:root .

# Bonus tutorial for hardcore SlackBuilders:
# The shebang line is hard-coded in adlcomp, but sed works on binaries,
# and we can use it to change the compiled-in string.
# The rules for doing this:
# 1. All occurrences of the text to replace will be changed, so make
#    sure either (a) it occurs only once, or else (b) you really do want
#    them all changed.
# 2. Replacement must be shorter than the original text.
# 3. Replacement must end with \x00. This is the famous NUL terminator
#    that C uses to terminate strings.
# 4. Only replace as many original characters as the replacement length,
#    including the NUL terminator.
# 5. The modified binary *must be* **exactly** the same size in bytes as
#    the original was. If not, you didn't follow rules 1-4 correctly!
# 6. If you're dealing with non-ASCII character encoding (e.g. UTF-8 or
#    UCS-2), make *damn sure* you know what you're doing! It's possible
#    but not necessarily straightforward. ASCII is easier (one byte is
#    one character).
# In the line below, the full original text was plain ASCII,
# "/users/cunniff/bin/adlrun". We only replace "/users/cunniff/bin/a". The
# \x00 terminates the string, replacing the "a", and the rest of the
# original text ("dlrun\x00") is left as-is in the binary (C code will
# ignore anything after the first \x00, so it just acts as padding).

sed -i 's,/users/cunniff/bin/a,/usr/games/adlrun03\x00,' adlcomp

# DO NOT strip these. The pseudo-64-bit binaries break if you do,
# because they're actually 32-bit pseudo-static, created by statifier.
# "file" shows them as "dynamically linked" but "ldd" says they're not,
# and strip gets powerfully confused by this state of affairs.
for bin in adlcomp adlrun adldebug; do
  install -m0755 -oroot -groot $bin $PKG/usr/games/$bin$YEAR
  ln -s $bin$YEAR $PKG/usr/games/$bin
  ln -s $bin.6.gz $PKG/usr/man/man6/$bin$YEAR.6.gz
done

DOCDIR=$PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM$YEAR
mkdir -p $DOCDIR
cp -a readme *.txt $DOCDIR

# The samples come from CVS, circa 2003
tar xvf $CWD/$PRGNAM$YEAR-samples.tar.gz
chown -R root:root $PRGNAM$YEAR-samples
cp -a $PRGNAM$YEAR-samples $DOCDIR/samples

### Last, the 2011 development version, from CVS. We install the docs
#   but not the man pages or compiled sample games.
YEAR=11
cd $TMP/$PRGNAM
tar xvf $CWD/$PRGNAM-$VERSION.tar.gz
cd $PRGNAM-$VERSION
chown -R root:root .

# Patch is similar to the one for adl93.
patch -p1 < $CWD/compilefixes$YEAR.diff

# Install the docs first, so we don't get the compiled samples/demos.
DOCDIR=$PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM$YEAR
mkdir -p $DOCDIR
chmod 644 doc/*.*
cp -a C* porting readme doc samples $DOCDIR

make -j1 all BIN=$PKG/usr/games OPTFLAGS="$SLKCFLAGS"

install -s -m0755 adlcomp/adlcomp $PKG/usr/games/adlcomp$YEAR
install -s -m0755 adlrun/adlrun $PKG/usr/games/adlrun$YEAR
install -s -m0755 misc/adldebug $PKG/usr/games/adldebug$YEAR

for bin in adlcomp adlrun adldebug; do
  ln -s $bin.6.gz $PKG/usr/man/man6/$bin$YEAR.6.gz
done

### OK, now regular SBo stuff from here on out.

cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
cat $CWD/README_versions.txt > $PKG/usr/doc/$PRGNAM-$VERSION/README_versions.txt
mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc

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