#!/bin/bash

# Copyright 2008, 2009, 2010, 2018, 2019  Patrick J. Volkerding, Sebeka, MN, USA
# 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.

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

PKGNAM=p2c
VERSION=${VERSION:-2.02}
BUILD=${BUILD:-1}

# Automatically determine the architecture we're building on:
if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) export ARCH=i586 ;;
    arm*) export ARCH=arm ;;
    loongarch64) export ARCH=loong64 ;;
    # Unless $ARCH is already set, use uname -m for all other archs:
       *) export ARCH=$( 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 "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PKGNAM-$VERSION-$ARCH-$BUILD.txz"
  exit 0
fi

NUMJOBS=${NUMJOBS:-" -j$(expr $(nproc) + 1) "}

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "s390" ]; then
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
elif [ "$ARCH" = "loong64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

TMP=${TMP:-/tmp}
PKG=$TMP/package-p2c

rm -rf $PKG
mkdir -p $TMP $PKG

cd $TMP
rm -rf p2c-${VERSION}
tar xvf $CWD/p2c-${VERSION}.tar.?z || exit 1
cd p2c-${VERSION} || exit 1

chown -R root:root .
find . \
  \( -perm 777 -o -perm 775 -o -perm 711 -o -perm 555 -o -perm 511 \) \
  -exec chmod 755 {} \+ -o \
  \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
  -exec chmod 644 {} \+

find . -name "*.orig" | xargs rm --verbose

# Fix library paths:
sed -i -e "s#/lib #/lib${LIBDIRSUFFIX} #g" \
       -e "s#/lib\$#/lib${LIBDIRSUFFIX}#g" \
       -e "s#/lib/#/lib${LIBDIRSUFFIX}/#g" \
        $( grep -lr '/lib' * )

cd src

# Add includes to get rid of some warnings:
sed -e '/^#include <stdio.h>/ a #include <stdlib.h>' -i 'makeproto.c'
# expose conflicting declarations:
sed -e '/^#include "trans.h"/ i #include <unistd.h>' -i 'trans.c'
# Switch to built in link,unlink declarations:
sed -e '/^int u*n*link / s:^.*$:/* & */:g' -i 'trans.h'

# Switch from private to public build:
sed -e '/private version/,/^$/ s:^[A-Z]:#&:g' \
    -e '/public version/,/^$/ s:^#\([A-Z]\):\1:g' \
    -i 'Makefile'

make OPT="$SLKCFLAGS" || exit 1
make p2cc || exit 1

mkdir -p $PKG/usr/bin
mkdir -p $PKG/usr/lib${LIBDIRSUFFIX}/p2c
mkdir -p $PKG/usr/include/p2c
mkdir -p $PKG/usr/man/man1

cat p2c > $PKG/usr/bin/p2c
cat p2cc > $PKG/usr/bin/p2cc
chmod 755 $PKG/usr/bin/*
cat libp2c.a > $PKG/usr/lib${LIBDIRSUFFIX}/libp2c.a
cat p2c.man | gzip -9c > $PKG/usr/man/man1/p2c.1.gz
cat p2cc.man | gzip -9c > $PKG/usr/man/man1/p2cc.1.gz
cat sys.p2crc > $PKG/usr/lib${LIBDIRSUFFIX}/p2c/p2crc
cat loc.p2crc > $PKG/usr/lib${LIBDIRSUFFIX}/p2c/loc.p2crc
cat system.imp > $PKG/usr/lib${LIBDIRSUFFIX}/p2c/system.imp
cat system.m2 > $PKG/usr/lib${LIBDIRSUFFIX}/p2c/system.m2
cat turbo.imp > $PKG/usr/lib${LIBDIRSUFFIX}/p2c/turbo.imp
cat string.pas > $PKG/usr/lib${LIBDIRSUFFIX}/p2c/string.pas
cat p2c.h > $PKG/usr/include/p2c/p2c.h
cd ..

find $PKG | xargs file | grep -e "executable" -e "shared object" \
  | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null

mkdir -p $PKG/usr/doc/p2c-${VERSION}
cp -a \
  README ftp.README \
  $PKG/usr/doc/p2c-${VERSION}
( cd src
  for file in HISTORY NOTES COPYING INSTALL ; do
    cp -a $file $PKG/usr/doc/p2c-${VERSION}
  done
)
cp -a src/README $PKG/usr/doc/p2c-${VERSION}/README.src
mkdir -p $PKG/usr/doc/p2c-${VERSION}/examples
( cd examples
  cp -a Makefile README basic.doc basic.p cref.p e.p fact.p p2crc self.p $PKG/usr/doc/p2c-${VERSION}/examples )
# Fix examples Makefile:
sed -i "s#usr/lib#usr/lib${LIBDIRSUFFIX}#g" $PKG/usr/doc/p2c-${VERSION}/examples/Makefile
sed -i "s#../p2c#p2c#g" $PKG/usr/doc/p2c-${VERSION}/examples/Makefile
sed -i "s#../home/libp2c.a#/usr/lib${LIBDIRSUFFIX}/libp2c.a#g" $PKG/usr/doc/p2c-${VERSION}/examples/Makefile
sed -i "s#../home#/usr/include/p2c#g" $PKG/usr/doc/p2c-${VERSION}/examples/Makefile

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc

# Build the package:
cd $PKG
/sbin/makepkg -l y -c n $TMP/p2c-$VERSION-$ARCH-$BUILD.txz