#!/bin/sh -e
#
# 2012 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
#

assert ()                 #  If condition false,
{                         #+ exit from script with error message.
	E_PARAM_ERR=98
	E_ASSERT_FAILED=99

	if [ -z "$2" ]          # Not enough parameters passed.
	then
		return $E_PARAM_ERR   # No damage done.
	fi

	lineno=$2

	if [ ! "$1" ]
	then
		echo "Assertion failed:  \"$1\""
		# shellcheck disable=SC2039
		# shellcheck disable=SC3044
		echo "File \"$0\", line $lineno, called by $(caller 0)"
		exit $E_ASSERT_FAILED
	fi
}

# Debug
#exec >&2
#set -x

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

flavor="$(cat "$__object/parameter/flavor")"
version="$(cat "$__object/parameter/version")"
pkgsite="$(cat "$__object/parameter/pkgsite")"
state="$(cat "$__object/parameter/state")"
curr_version="$(cat "$__object/explorer/pkg_version")"
add_cmd="pkg_add"
rm_cmd="pkg_delete"
cmd=""

# Print the command to be executed
#	Parms:	$1 -- mode, "remove" or "add"
#		$2 -- the command to be echoed
# FIXME: This is ugly.
execcmd(){
	# Set the PACKAGESITE if we're ADDing a new package
	if [ "$1" = "add" ] && [ -n "$pkgsite" ]; then
		# Use http.../All/ if we know the exact version we want, use .../Latest/ otherwise
		pkgsite="export PACKAGESITE=${pkgsite}"
		[ -n "$version" ] && pkgsite="${pkgsite}/All/" || pkgsite="${pkgsite}/Latest/"
		echo "${pkgsite}"
	fi
	echo "${2} 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 "$curr_version" ]; then	# PKG *is* installed
	if [ "$state" = "absent" ]; then	# Shouldn't be installed
		if [ -n "$flavor" ]; then
			cmd="${rm_cmd} ${name}-${flavor}-${curr_version}"
		else
			cmd="${rm_cmd} ${name}-${curr_version}"
		fi
		execcmd "remove" "${cmd}"
		echo "removed" >> "$__messages_out"
		exit 0
	else	# Should be installed
		if [ -n "$version" ]; then	# Want a specific version
			if [ "$version" = "$curr_version" ]; then	# Current version is correct
				exit 0
			else	# Current version is wrong, fix
				#updatepkg "$name" "$version"
				# shellcheck disable=SC2039
				assert "! ${version} = ${curr_version}" $LINENO
				cmd="${rm_cmd} ${name}-${curr_version}"
				execcmd "remove" "${cmd}"
				cmd="${add_cmd} -r ${name}-${version}"
				execcmd "add" "${cmd}"
				echo "installed" >> "$__messages_out"
			fi
		else	# Don't care what version to use
			exit 0
		fi
	fi
else	# PKG *isn't* installed
	if [ "$state" = "absent" ]; then	# Shouldn't be installed
		exit 0
	elif [ "$state" = "present" ]; then	# Is not currently installed, should be
		if [ -n "$flavor" ]; then
			cmd="${add_cmd} -r ${name}-${flavor}"
		else
			cmd="${add_cmd} -r ${name}"
		fi
		if [ -n "$version" ]; then
			cmd="${cmd}-${version}"
		fi
		execcmd "add" "${cmd}"
		echo "installed" >> "$__messages_out"
		exit 0
	fi
fi

# Debug
#set +x