#!/bin/sh
#
# 2014 Jake Guffey (jake.guffey at eprotex.com)
#
# This file is part of cdist.
#
# cdist is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# cdist is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with cdist. If not, see <http://www.gnu.org/licenses/>.
#
#
# Manage packages with pkg on FreeBSD
#

# Debug
#exec >&2
#set -x

if [ -f "$__object/parameter/name" ]; then
   name="$(cat "$__object/parameter/name")"
else
   name="$__object_id"
fi

if [ -f "$__object/parameter/flavor" ]; then
   flavor="$(cat "$__object/parameter/flavor")"
fi

if [ -f "$__object/parameter/version" ]; then
   version="$(cat "$__object/parameter/version")"
fi

if [ -f "$__object/parameter/upgrade" ]; then
   upgrade="true"
else
   upgrade="false"
fi

if [ -f "$__object/parameter/repo" ]; then
   repo="$(cat "$__object/parameter/repo")"
fi

if [ -f "$__object/parameter/state" ]; then
   state="$(cat "$__object/parameter/state")"
else
   state="present"
fi
curr_version="$(cat "$__object/explorer/pkg_version")"
add_cmd="pkg install -y"
rm_cmd="pkg delete -y"
upg_cmd="pkg upgrade -y"
cmd=""

# Print the command to be executed
# Parms: $1 -- mode, "rm", "add", or "upg"
#        $2 -- the command to be echoed
execcmd(){
   local _cmd=""

   case "$1" in
      add)
         _cmd="${add_cmd} $2"
         ;;
      rm)
         _cmd="${rm_cmd} $2"
         ;;
      upg)
         _cmd="${upg_cmd} $2"
         ;;
      *)
         printf "Error. Don't understand command: %s" "$1" >&2
         exit 1
         ;;
   esac

   echo "$_cmd 2>&- >&-"   # Silence the output of the command
   echo "status=\$?"
   echo "if [ \"\$status\" -ne \"0\" ]; then"
   echo "	echo \"Error: ${_cmd} exited nonzero with \$status\"'!' >&2"
   echo "	exit 1"
   echo "fi"
}

if [ -n "$curr_version" ]; then  # PKG *is* installed
   if [ -n "$repo" ]; then
      cmd="-r ${repo} ${name}"
   else
      cmd="${name}"
   fi
   if [ -n "$flavor" ]; then
      cmd="${cmd}-${flavor}"
   fi
   # PKG is supposed to be removed
   if [ "$state" = "absent" ]; then
      execcmd "rm" "${cmd}"
   # PKG is supposed to be installed to a particular version
   elif [ -n "$version" ] && [ "$version" != "$curr_version" ]; then
      if [ "$upgrade" = "true" ]; then
         execcmd "upg" "${cmd}"
      else
         printf "Version %s is already installed and pkg-ng can't upgrade directly to version %s.\nTo upgrade to the latest version, use the --upgrade flag.\n" "$curr_version" "$version" >&2
         exit 1
      fi
   # PKG is supposed to be installed to the latest version
   else
      :  # Do nothing.
   fi
else  # PKG *isn't* installed
   if [ "$state" = "absent" ]; then # Shouldn't be installed
      exit 0
   else  # Should be installed
      if [ -n "$repo" ]; then
         cmd="-r ${repo} ${name}"
      else
         cmd="${name}"
      fi
      if [ -n "$flavor" ]; then
         cmd="${cmd}-${flavor}"
      fi
      if [ -n "$version" ]; then
         cmd="${cmd}-${version}"
      fi

      execcmd "add" "$cmd"
      exit 0
   fi
fi

# Debug
#set +x
