#!/bin/bash
#
# Slackware build script for kubectl
#
# Copyright 2019-2022  Dimitris Zlatanidis  Orestiada, Greece
# Copyright 2025 r1w1s1 <r1w1s1@fastmail.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)

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

PKGBASE=kubernetes
PRGNAM=kubectl
VERSION=${VERSION:-1.35.4}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}
PKGTYPE=${PKGTYPE:-tgz}
ARCH=${ARCH:-}
PRINT_PACKAGE_NAME=${PRINT_PACKAGE_NAME:-}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i586 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi

set -e

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

# Set up Go environment
export GOPATH=$(pwd)/.gopath
mkdir -p $GOPATH
export PATH=$GOPATH/bin:$PATH

# Build kubectl with Slackware optimization flags
export GOFLAGS="-buildmode=pie"  # Only Go compiler flags here
export LDFLAGS="-s -compressdwarf=true" # Linker flags go here
export CGO_CFLAGS="$SLKCFLAGS"  # C compiler flags
make WHAT=cmd/kubectl

# Install the binary
mkdir -p "$PKG/usr/bin"
install -m 0755 _output/bin/kubectl $PKG/usr/bin/kubectl

# Install shell completions
mkdir -p $PKG/usr/share/bash-completion/completions/
_output/bin/kubectl completion bash > $PKG/usr/share/bash-completion/completions/${PRGNAM}

mkdir -p $PKG/usr/share/zsh/site-functions/
_output/bin/kubectl completion zsh > $PKG/usr/share/zsh/site-functions/${PRGNAM}

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

mkdir -p "$PKG/usr/doc/${PRGNAM}-${VERSION}"
cp -a LICENSE README.md $PKG/usr/doc/${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

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