#!/bin/sh

# Slackware build script for dnscrypt-proxy

# Copyright 2018 T3slider <t3slider@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.

# Thanks to Larry Hajali for work on README.Slackware, the basis for the sample
# dnsmasq configuration, and the idea for an init script. His contributions
# significantly improved the value of this script!

PRGNAM=dnscrypt-proxy
VERSION=${VERSION:-2.0.16}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}

DOMAIN=github.com
ORG=jedisct1

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

CWD=$(pwd)
TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

if [ "$ARCH" = "i586" ]; then
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  LIBDIRSUFFIX="64"
else
  LIBDIRSUFFIX=""
fi

set -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$VERSION
mkdir -p $PRGNAM-$VERSION/src/$DOMAIN/$ORG
cd $PRGNAM-$VERSION/src/$DOMAIN/$ORG
tar xvf $CWD/$PRGNAM-$VERSION.tar.gz
mv $PRGNAM-$VERSION $PRGNAM
cd $PRGNAM
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 {} \;

# Error compiling with go 1.11; fixed in dnscrypt-proxy master but not in the
# latest release
patch -p1 < $CWD/poly1305.patch

export GOPATH="$TMP/$PRGNAM-$VERSION"

go install -a -x ./...

mkdir -p $PKG/usr/sbin

install -m 755 "$TMP/$PRGNAM-$VERSION/bin/${PRGNAM}" $PKG/usr/sbin/${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 $PKG/var/log/$PRGNAM $PKG/etc/default $PKG/etc/$PRGNAM
chmod 0700 $PKG/var/log/$PRGNAM
sed "s/@VERSION@/$VERSION/" $CWD/$PRGNAM.default > $PKG/etc/default/$PRGNAM.new
install -D -m 0755 $CWD/rc.$PRGNAM $PKG/etc/rc.d/rc.$PRGNAM.new
install -D -m 0644 $CWD/$PRGNAM.toml $PKG/etc/$PRGNAM/$PRGNAM.toml.new

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a \
  ChangeLog LICENSE README.md utils $PRGNAM/example-* \
  $PKG/usr/doc/$PRGNAM-$VERSION
sed "s/@VERSION@/$VERSION/g" $CWD/README.Slackware > $PKG/usr/doc/$PRGNAM-$VERSION/README.Slackware
cat $CWD/dnsmasq.conf > $PKG/usr/doc/$PRGNAM-$VERSION/dnsmasq.conf
cat $CWD/named.conf > $PKG/usr/doc/$PRGNAM-$VERSION/named.conf
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:-tgz}