#!/bin/bash
#
# Slackware build script for immortal-barons
#
# Copyright 2026 / Andy Alt / United States
# 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=immortal-barons
VERSION=${VERSION:-0.1.2}
SOURCEARCHIVE=$PRGNAM-v$VERSION-vendored-source.tar.gz
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}
PKGTYPE=${PKGTYPE:-tgz}
TEST=${TEST:-no}

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}

# Stock Slackware's /usr/bin/go is gccgo, which is far too old to build this
# and gives a confusing error rather than saying so. google-go-lang installs
# the real toolchain under /usr/lib{,64}/go<version>/go/bin and puts it ahead
# of /usr/bin through /etc/profile.d/go.sh -- which a build shell that never
# read /etc/profile has not seen. Find it here so the script works either way.
for GODIR in /usr/lib64 /usr/lib ; do
  if ls $GODIR/go*/go/bin/go >/dev/null 2>&1 ; then
    export PATH="$(dirname "$(ls -1d $GODIR/go*/go/bin/go | sort -V | tail -n1)"):$PATH"
    break
  fi
done

if ! command -v go >/dev/null 2>&1 ; then
  echo "ERROR: no go found. Install google-go-lang from SlackBuilds.org." >&2
  exit 1
fi

GO_FULL_VERSION="$(go version)"
if echo "$GO_FULL_VERSION" | grep -qi gccgo ; then
  echo "ERROR: $PRGNAM needs the Google Go toolchain, not gccgo." >&2
  echo "Found: $GO_FULL_VERSION" >&2
  echo "Install google-go-lang and put its bin directory before /usr/bin." >&2
  exit 1
fi

# The minimum the module itself declares; below it the build fails on syntax.
MIN_GO_VERSION=1.26.4
GO_VERSION="$(echo "$GO_FULL_VERSION" | awk '{print $3}' | sed 's/^go//')"
if [ "$(printf '%s\n%s\n' "$MIN_GO_VERSION" "$GO_VERSION" | sort -V | head -n1)" != "$MIN_GO_VERSION" ] ; then
  echo "ERROR: $PRGNAM needs Go >= $MIN_GO_VERSION. Found: $GO_VERSION" >&2
  exit 1
fi
echo "Using $GO_FULL_VERSION"

set -e

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

# Read the .info and make sure the md5sum matches.
if ! echo "$(grep '^MD5SUM=' $CWD/$PRGNAM.info | cut -d'"' -f2)  $CWD/$SOURCEARCHIVE" | md5sum -c - ; then
  echo "ERROR: MD5 checksum mismatch for $SOURCEARCHIVE" >&2
  exit 1
fi

tar xvf $CWD/$SOURCEARCHIVE
cd $PRGNAM-v$VERSION
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 {} \;

# The upstream release ships its dependencies in vendor/, so the build needs
# no network. GOFLAGS pins that; GOPATH and GOCACHE are kept inside $TMP so the
# build never writes to the building user's home.
export GOFLAGS="-mod=vendor"
export GOPROXY=off
export GOPATH=$TMP/gopath-$PRGNAM
export GOCACHE=$TMP/gocache-$PRGNAM
export CGO_ENABLED=0

# -trimpath keeps the build reproducible; -s -w drop the symbol table and DWARF,
# which is what the strip pass below would do to a cgo binary anyway.
go build -trimpath -ldflags "-s -w" -o $PRGNAM ./cmd/$PRGNAM
go build -trimpath -ldflags "-s -w" -o barons-ftn ./cmd/barons-ftn

if [ "$TEST" = "yes" ]; then
  mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
  go test ./... | tee $PKG/usr/doc/$PRGNAM-$VERSION/test_results.txt
fi

install -D -m 0755 $PRGNAM $PKG/usr/games/$PRGNAM
install -D -m 0755 barons-ftn $PKG/usr/games/barons-ftn

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION/docs
cp -a LICENSE README.md ChangeLog install-xtrn.ini \
  $PKG/usr/doc/$PRGNAM-$VERSION
cp -a docs/faq.md docs/playing.md docs/command-reference.md \
  docs/door-setup.md docs/bulletins.md docs/inter-bbs.md \
  docs/inter-bbs-troubleshooting.md docs/charset.md docs/translating.md \
  docs/ftn-transport.md \
  $PKG/usr/doc/$PRGNAM-$VERSION/docs
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