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#!/bin/sh

# Slackware build script for slack-osquery

# Copyright 2020 Andrew Clemons, Wellington New Zealand
# 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.

PRGNAM=slack-osquery
VERSION=${VERSION:-1.0}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}

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

set -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$VERSION
tar xvf $CWD/$PRGNAM-$VERSION.tar.gz
cd $PRGNAM-$VERSION

mkdir -p vendor/github.com

for DEPENDENCY in Microsoft/go-winio/0.4.9 \
                  apache/thrift/0.12.0 \
                  davecgh/go-spew/1.1.0 \
                  kolide/osquery-go/a74aa860032dacda9b8304c6565efcb9d80dfaa9 \
                  pkg/errors/0.8.0 \
                  pmezard/go-difflib/1.0.0 \
                  stretchr/testify/1.2.2 ; do
  DEPENDENCY_OWNER="$(echo "$DEPENDENCY" | cut -d/ -f1)"
  DEPENDENCY_NAME="$(echo "$DEPENDENCY" | cut -d/ -f2)"
  DEPENDENCY_REV="$(echo "$DEPENDENCY" | cut -d/ -f3)"

  mkdir -p "vendor/github.com/$DEPENDENCY_OWNER"

  tar xf "$CWD/$DEPENDENCY_NAME-$DEPENDENCY_REV.tar.gz"
  mv "$DEPENDENCY_NAME-$DEPENDENCY_REV" "vendor/github.com/$DEPENDENCY_OWNER/$DEPENDENCY_NAME"
done

mkdir -p vendor/golang.org/x
for DEPENDENCY in sys/14742f9018cd6651ec7364dc6ee08af0baaa1031 ; do
  DEPENDENCY_NAME="$(echo "$DEPENDENCY" | cut -d/ -f1)"
  DEPENDENCY_REV="$(echo "$DEPENDENCY" | cut -d/ -f2)"

  tar xf "$CWD/$DEPENDENCY_NAME-$DEPENDENCY_REV.tar.gz"
  mv "$DEPENDENCY_NAME-$DEPENDENCY_REV" "vendor/golang.org/x/$DEPENDENCY_NAME"
done

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 {} \;

go build -a -mod=vendor -o target/slackware.ext
mkdir -p $PKG/usr/lib${LIBDIRSUFFIX}/osquery/extensions

install -m 0700 target/slackware.ext $PKG/usr/lib${LIBDIRSUFFIX}/osquery/extensions/slackware.ext

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 \
  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:-tgz}