#!/bin/bash

# Slackware build script for noweb

# Copyright 2010-2024 Kyle Guinn <elyk03@gmail.com>
# 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)

PRGNAM=noweb
VERSION=${VERSION:-2.13}
SRCVER=$(echo $VERSION | tr . _)
BUILD=${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}

DOCS="CHANGES COPYRIGHT LICENSE README examples/"

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 $PRGNAM-$SRCVER
tar xvf $CWD/$PRGNAM-$SRCVER.tar.gz
cd $PRGNAM-$SRCVER
chown -R root:root .
chmod -R u+w,go-w,a+rX-st .

# Adds PREFIX and DESTDIR support along with various other simplifications
patch -p1 < $CWD/patches/make_cleanup.diff

# Postpone texhash until doinst.sh
sed -i 's/texhash/true/g' src/Makefile

# Does something like s/nawk/awk/ on several scripts
(cd src && ./awkname awk)

# Fix timestamps.  The general problem is that noweb's sources (and even
# a Makefile) are written in noweb syntax and need to be "tangled" (code
# chunks extracted to an ordinary source file) using notangle, requiring
# a working version of noweb to already be installed.  To bootstrap, the
# tarball provides pre-tangled files that we must `touch` so that `make`
# does not regenerate them.  We assume the touched files are up-to-date,
# which may not always be true.  This script does not attempt rebuilding
# the package to fix any such issues.
#
# First, prevent Makefile from regenerating itself before `make boot`.
touch src/Makefile
# Now `make boot` should touch the remaining files needed to bootstrap.
# Beware, this may touch files not provided in the tarball (typically
# documentation), creating empty files that will not be properly
# generated later.  Before version 2.13, this included the man pages.
make -C src boot

make -j1 -C src all install \
  ICONC="icont" \
  LIBSRC="icon" \
  PREFIX="/usr" \
  MAN="/usr/man" \
  TEXINPUTS="/usr/share/texmf-local/tex/latex/$PRGNAM" \
  ELISP="/usr/share/emacs/site-lisp" \
  CFLAGS="$SLKCFLAGS" \
  DESTDIR="$PKG"

find $PKG/usr/man -type f -exec gzip -9 {} +
for i in $(find $PKG/usr/man -type l); do ln -s $(readlink $i).gz $i.gz; rm $i; done

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a $DOCS $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

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