#!/bin/bash
#
#          DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
#                   Version 2, December 2004
#
# Copyright (C) 2004 Sam Hocevar <sam@hocevar.net>
#
# Everyone is permitted to copy and distribute verbatim or modified
# copies of this license document, and changing it is allowed as long
# as the name is changed.
#
#          DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
#  TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
#
#
# 0. You just DO WHAT THE FUCK YOU WANT TO.
#
# SlackBuild script for landrun
# =============================
# By:          r1w1s1 (https://fosstodon.org/@r1w1s1)
# For:         landrun
# Descr:       secure sandbox for running Linux processes using Landlock
# URL:
# Changelog:
# v0.1.12:     25/Mar/2025 by r1w1s1 - Initial build from sources.

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

# improves robustness, error handling, and security
set -euo pipefail
IFS=$'\n\t'

PRGNAM=landrun
VERSION=${VERSION:-0.1.12}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}
PKGTYPE=${PKGTYPE:-tgz}
ARCH=${ARCH:-}
PRINT_PACKAGE_NAME=${PRINT_PACKAGE_NAME:-}

# Automatically determine the architecture
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}

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

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

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
elif [ "$ARCH" = "aarch64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

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

rm -rf ${PRGNAM}-${VERSION}
tar xvf $CWD/${PRGNAM}-${VERSION}.tar.gz
cd ${PRGNAM}-${VERSION}

# Set permissions
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 {} \;

# Build the binary
go build -o landrun cmd/landrun/main.go

# Install the binary to /usr/bin
mkdir -p $PKG/usr/bin
install -m 0755 landrun $PKG/usr/bin/landrun

# Strip binaries
find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true

# Copy documentation (if any exists)
mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a README.md LICENSE $PKG/usr/doc/$PRGNAM-$VERSION 2>/dev/null || true
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

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

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