#!/bin/bash

# Slackware build script for slang (binary repack)

# Copyright 2026 danix <danix@danix.xyz>
# 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=slang-bin
SRCNAM=slang
VERSION=${VERSION:-2026.18.2}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}
PKGTYPE=${PKGTYPE:-tgz}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    *) ARCH=$( uname -m ) ;;
  esac
fi

if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
  exit 0
fi

# Upstream ships x86_64 and aarch64 tarballs; only x86_64 is packaged here.
if [ "$ARCH" != "x86_64" ]; then
  echo "$ARCH is not supported: this script packages the x86_64 tarball only."
  exit 1
fi

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

# Where the slang tree lands.  The binaries resolve their libs through a
# RUNPATH of $ORIGIN/../lib, so bin/ and lib/ must stay siblings; keeping the
# whole tree under one prefix preserves that without patching any ELF.
# Versioned so an upgrade cannot leave a previous release's libs behind.
APPDIR=/opt/$PRGNAM-$VERSION

set -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $SRCNAM-$VERSION
# The tarball has no top-level directory: it unpacks bin/, lib/, include/ and
# friends straight into the CWD, so make one to unpack into.
mkdir $SRCNAM-$VERSION
cd $SRCNAM-$VERSION
tar xvf $CWD/$SRCNAM-$VERSION-linux-x86_64.tar.gz

mkdir -p $PKG$APPDIR
cp -a . $PKG$APPDIR

# Make every bundled ELF executable.  Upstream ships the shared libraries
# 0644, which trips sbopkglint's 20-arch test.  Match by content, not name.
# Do NOT strip: these are prebuilt binaries shipped by upstream, and
# libslang-llvm.so in particular is large and best left as built.
find $PKG -type f -print0 | xargs -0 file | grep -e "executable" -e "shared object" \
  | grep ELF | cut -f 1 -d : | while read elf; do
  chmod 755 "$elf"
done

# Expose the command line tools on PATH.  kitty finds the shader compiler by
# looking up a bare "slangc", so this symlink is what makes it build.  APPDIR
# is versioned, so the links are generated here rather than hardcoded.
mkdir -p $PKG/usr/bin
for tool in slangc slangd slangi slang ; do
  ln -s $APPDIR/bin/$tool $PKG/usr/bin/$tool
done

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a LICENSE LICENSES README.md third-party-notices \
  $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/README > $PKG/usr/doc/$PRGNAM-$VERSION/README
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

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

chown -R root:root $PKG
# -type l is excluded before the perm tests: the /usr/bin entries point into
# APPDIR, which only exists once the package is installed, so inside $PKG they
# are dangling.  find -L follows symlinks, and chmod on a dangling one errors
# out under set -e.  Their target gets the right mode from the pass anyway.
find -L $PKG ! -type 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 {} \+

# Every directory must be world-traversable.  The block above only remaps the
# modes it lists, so a directory shipped 0700 would pass through untouched and
# leave the tree readable only by root.  Root-run lint and root-run builds
# cannot see that, so normalize unconditionally.
find $PKG -type d -exec chmod 755 {} \+

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