#!/bin/sh
# $Id$
# Copyright 2016  Eric Hameleers, Eindhoven NL
# All rights reserved.
#
#   Permission to use, copy, modify, and distribute this software for
#   any purpose with or without fee is hereby granted, provided that
#   the above copyright notice and this permission notice appear in all
#   copies.
#
#   THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 AUTHORS AND COPYRIGHT HOLDERS AND THEIR
#   CONTRIBUTORS 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.
# -----------------------------------------------------------------------------
#
# Slackware SlackBuild script 
# ===========================
# By:          Eric Hameleers <alien@slackware.com>
# For:         ot-recorder
# Descr:       OwnTracks recorder
# URL:         http://owntracks.org/
# Build needs: 
# Needs:       c-ares,libconfig,lua,mosquitto
# Changelog:   
# 0.6.7-1:     29/Aug/2016 by Eric Hameleers <alien@slackware.com>
#              * Initial build.
# 
# Run 'sh ot-recorder.SlackBuild' to build a Slackware package.
# The package (.t?z) and .txt file as well as build logs are created in /tmp .
# Install the package using 'installpkg' or 'upgradepkg --install-new'.
#
# -----------------------------------------------------------------------------

PRGNAM=ot-recorder
SRCNAM=recorder
VERSION=${VERSION:-0.6.7}
BUILD=${BUILD:-1}
NUMJOBS=${NUMJOBS:-" -j4 "}
TAG=${TAG:-alien}

DOCS="Changelog LICENSE README.md"

# Needed for the creation of the 'mosquitto' user account which we also
# use in the mosquitto package (ot-recorder talks to this MQTT server):
MOSQUSR=mosquitto
MOSQUSRID=309
MOSQGRP=mosquitto
MOSQGRPID=309


# Where do we look for sources?
SRCDIR=$(cd $(dirname $0); pwd)

# Place to build (TMP) package (PKG) and output (OUTPUT) the program:
TMP=${TMP:-/tmp/build}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

SOURCE="$SRCDIR/${SRCNAM}-${VERSION}.tar.gz"
SRCURL="https://github.com/owntracks/${SRCNAM}/archive/${VERSION}.tar.gz"

##
## --- with a little luck, you won't have to edit below this point --- ##
##

# You can use your own private machine.conf file to overrule machine defaults:
if [ -e $SRCDIR/machine.conf ]; then
  . $SRCDIR/machine.conf
elif [ -e /etc/slackbuild/machine.conf ]; then
  . /etc/slackbuild/machine.conf
else
  # Automatically determine the architecture we're building on:
  if [ -z "$ARCH" ]; then
    case "$(uname -m)" in
      i?86) ARCH=i486 ;;
      arm*) readelf /usr/bin/file -A | egrep -q "Tag_CPU.*[4,5]" && ARCH=arm || ARCH=armv7hl ;;
      # Unless $ARCH is already set, use uname -m for all other archs:
      *) ARCH=$(uname -m) ;;
    esac
    export ARCH
  fi
  # Set CFLAGS/CXXFLAGS and LIBDIRSUFFIX:
  case "$ARCH" in
    i486)      SLKCFLAGS="-O2 -march=i486 -mtune=i686"
               SLKLDFLAGS=""; LIBDIRSUFFIX=""
               ;;
    x86_64)    SLKCFLAGS="-O2 -fPIC"
               SLKLDFLAGS="-L/usr/lib64"; LIBDIRSUFFIX="64"
               ;;
    armv7hl)   SLKCFLAGS="-O2 -march=armv7-a -mfpu=vfpv3-d16"
               SLKLDFLAGS=""; LIBDIRSUFFIX=""
               ;;
    armv6hl)   SLKCFLAGS="-O2 -march=armv6 -mfpu=vfp -mfloat-abi=hard"
               SLKLDFLAGS=""; LIBDIRSUFFIX=""
               ;;
    armv5hl)   SLKCFLAGS="-O2 -mthumb -march=armv5te -mtune=arm1176jzf-s -mfpu=vfp -mfloat-abi=softfp"
               SLKLDFLAGS=""; LIBDIRSUFFIX=""
               ;;
    *)         SLKCFLAGS=${SLKCFLAGS:-"O2"}
               SLKLDFLAGS=${SLKLDFLAGS:-""}; LIBDIRSUFFIX=${LIBDIRSUFFIX:-""}
               ;;
  esac
fi

case "$ARCH" in
    arm*)    TARGET=$ARCH-slackware-linux-gnueabi ;;
    *)       TARGET=$ARCH-slackware-linux ;;
esac

# Exit the script on errors:
set -e
trap 'echo "$0 FAILED at line ${LINENO}" | tee $OUTPUT/error-${PRGNAM}.log' ERR
# Catch unitialized variables:
set -u
P1=${1:-1}

# Save old umask and set to 0022:
_UMASK_=$(umask)
umask 0022

# Create working directories:
mkdir -p $OUTPUT          # place for the package to be saved
mkdir -p $TMP/tmp-$PRGNAM # location to build the source
mkdir -p $PKG             # place for the package to be built
rm -rf $PKG/*             # always erase old package's contents
rm -rf $TMP/tmp-$PRGNAM/* # remove the remnants of previous build
rm -rf $OUTPUT/{checkout,configure,make,install,error,makepkg,patch}-$PRGNAM.log
                          # remove old log files

# Source file availability:
if ! [ -f ${SOURCE} ]; then
  echo "Source '$(basename ${SOURCE})' not available yet..."
  # Check if the $SRCDIR is writable at all - if not, download to $OUTPUT
  [ -w "$SRCDIR" ] || SOURCE="$OUTPUT/$(basename $SOURCE)"
  if [ -f ${SOURCE} ]; then echo "Ah, found it!"; continue; fi
  if ! [ "x${SRCURL}" == "x" ]; then
    echo "Will download file to $(dirname $SOURCE)"
    wget --content-disposition -nv -T 20 -O "${SOURCE}" "${SRCURL}" || true
    if [ $? -ne 0 -o ! -s "${SOURCE}" ]; then
      echo "Downloading '$(basename ${SOURCE})' failed... aborting the build."
      mv -f "${SOURCE}" "${SOURCE}".FAIL
      exit 1
    fi
  else
    echo "File '$(basename ${SOURCE})' not available... aborting the build."
    exit 1
  fi
fi

if [ "$P1" == "--download" ]; then
  echo "Download complete."
  exit 0
fi

# --- PACKAGE BUILDING ---

echo "++"
echo "|| $PRGNAM-$VERSION"
echo "++"

cd $TMP/tmp-$PRGNAM
echo "Extracting the source archive(s) for $PRGNAM..."
tar -xvf ${SOURCE}
cd ${SRCNAM}-${VERSION}
chown -R root:root .
chmod -R u+w,go+r-w,a+rX-st .

echo Building ...
export LDFLAGS="$SLKLDFLAGS"
export CXXFLAGS="$SLKCFLAGS"
export CFLAGS="$SLKCFLAGS"
cp config.mk.in config.mk
sed -i -e '/^CFLAGS/s/ -Werror//' Makefile
make \
  INSTALLDIR=/usr \
  WITH_LUA=yes \
  MOSQUITTO_LIB=-L/usr/lib${LIBDIRSUFFIX} \
  CONFIGFILE=/etc/ot-recorder.conf \
  2>&1 | tee $OUTPUT/make-${PRGNAM}.log

# Manual installation:
mkdir -p $PKG/etc/default $PKG/etc/rc.d
mkdir -p $PKG/usr/bin $PKG/usr/sbin
mkdir -p $PKG/var/spool/owntracks/recorder/store/{ghash,last}
mkdir -p $PKG/var/spool/owntracks/recorder/htdocs
cp -R docroot/* $PKG/var/spool/owntracks/recorder/htdocs/
install --mode 0755 ot-recorder $PKG/usr/sbin
install --mode 0755 ocat $PKG/usr/bin
install --mode 0755 etc/rhel/ot-recorder.init $PKG/etc/rc.d/rc.ot-recorder.new
cp etc/rhel/ot-recorder.defaults $PKG/etc/default/ot-recorder.new

# Add this to the doinst.sh:
mkdir -p $PKG/install
cat <<EOINS >> $PKG/install/doinst.sh
# Handle the incoming configuration files:
config() {
  for infile in \$1; do
    NEW="\$infile"
    OLD="\`dirname \$NEW\`/\`basename \$NEW .new\`"
    # If there's no config file by that name, mv it over:
    if [ ! -r \$OLD ]; then
      mv \$NEW \$OLD
    elif [ "\`cat \$OLD | md5sum\`" = "\`cat \$NEW | md5sum\`" ]; then
      # toss the redundant copy
      rm \$NEW
    fi
    # Otherwise, we leave the .new copy for the admin to consider...
  done
}

preserve_perms() {
  NEW="\$1"
  OLD="\$(dirname \$NEW)/\$(basename \$NEW .new)"
  if [ -e \$OLD ]; then
    cp -a \$OLD \${NEW}.incoming
    cat \$NEW > \${NEW}.incoming
    mv \${NEW}.incoming \$NEW
  fi
  config \$NEW
}

preserve_perms etc/rc.d/rc.ot-recorder.new
config etc/default/ot-recorder.new

# Only way to create and use the correct uid and gid on the target system,
# is to use chroot:
chroot . <<EOR 2>/dev/null
# Add the '${MOSQGRP}' group if it doesn't already exist:
/usr/sbin/groupadd -g ${MOSQGRPID} ${MOSQGRP} 2> /dev/null
# Add the '${MOSQUSR}' user if it doesn't already exist:
/usr/sbin/useradd -c "Mosquitto service account"  \\
  -u ${MOSQUSRID} -g ${MOSQGRP} -s "/bin/false" ${MOSQUSR} 2> /dev/null

# Restore the correct permissions
chown -R ${MOSQUSR}:${MOSQGRP} var/spool/owntracks/recorder/store

# Binaries are setuid $MOSQUSR:
chown ${MOSQUSR}:${MOSQGRP} usr/bin/ocat usr/sbin/ot-recorder
chmod 4751 /usr/bin/ocat /usr/sbin/ot-recorder

#Initialize the LMDB databases.
# This initialization is non-destructive - it will not delete any data.
ot-recorder --initialize

EOR

EOINS

# Add documentation:
mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a $DOCS $PKG/usr/doc/$PRGNAM-$VERSION || true
cat $SRCDIR/$(basename $0) > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
chown -R root:root $PKG/usr/doc/$PRGNAM-$VERSION
find $PKG/usr/doc -type f -exec chmod 644 {} \;

# Compress the man page(s):
if [ -d $PKG/usr/man ]; then
  find $PKG/usr/man -type f -name "*.?" -exec gzip -9f {} \;
  for i in $(find $PKG/usr/man -type l -name "*.?") ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done
fi

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

# Add a package description:
mkdir -p $PKG/install
cat $SRCDIR/slack-desc > $PKG/install/slack-desc
cat $SRCDIR/slack-required > $PKG/install/slack-required

# Build the package:
cd $PKG
makepkg --linkadd y --chown n $OUTPUT/${PRGNAM}-${VERSION}-${ARCH}-${BUILD}${TAG}.${PKGTYPE:-tgz} 2>&1 | tee $OUTPUT/makepkg-${PRGNAM}.log
cd $OUTPUT
md5sum ${PRGNAM}-${VERSION}-${ARCH}-${BUILD}${TAG}.${PKGTYPE:-tgz} > ${PRGNAM}-${VERSION}-${ARCH}-${BUILD}${TAG}.${PKGTYPE:-tgz}.md5
cd -
cat $PKG/install/slack-desc | grep "^${PRGNAM}" > $OUTPUT/${PRGNAM}-${VERSION}-${ARCH}-${BUILD}${TAG}.txt
cat $PKG/install/slack-required > $OUTPUT/${PRGNAM}-${VERSION}-${ARCH}-${BUILD}${TAG}.dep

# Restore the original umask:
umask ${_UMASK_}