export PATH=$PATH:/opt/ytools/bin

# -- private stuff not intended for use outside of this script
_ytools_check_config_present()
{
	if [ -z "$ytools_config_files" ]; then
		if [ "$1" = true ]; then
			ytools_log "warning: $0 tries to access configuration witout having a config file"
		fi
		return 1;
	fi
	return 0;
}


_ytools_check_config_files_readable()
{
	local new=""
	for f in $ytools_config_files; do
		[ -f "$f" -a -r "$f" ] && new="$new $f"
	done
	ytools_config_files="$new"
}

_ytools_probe_config_paths()
{
	local f new exp dir
	[ ! "$ytools_config_files" ] && ytools_config_files="
		/etc/opt/$ytools_project/$ytools_basename.conf
		$HOME/.$ytools_project/$ytools_basename.conf
		$HOME/.$ytools_project/$rc
		$HOME/.$ytools_basename/$ytools_basename.conf
		$HOME/.$ytools_basename/$rc
		$HOME/.$rc
	"
	_ytools_check_config_files_readable

	# add includes
	new=""
	for f in $ytools_config_files; do

		exp=`sed '
			/^[ 	]*include[ 	]/ !d
			s/^[ 	]*include[ 	]*//g
		' $f`

		if [ "$exp" ]; then
			if [ "${exp:0:1}" != '/' ]; then
				dir=`dirname $f`
				exp=$dir/$exp
			fi
			exp=`ls -d $exp 2>/dev/null`
			new="$new $f $exp"
		fi
	done

	[ "$new" ] && ytools_config_files="$new"

	_ytools_check_config_files_readable
}

_ytools_cat_section()
{
	if [ "$2" ]; then
		sed -n "/\[$2\]/,/[^ 	]*\[/ p" $1 | sed '/[^ 	]*\[/ d; /^[ 	]*include[ 	]/ d'
		return
	fi

	sed -n '0,/[^ 	]*\[/ p' $1 | sed '/[^ 	]*\[/ d; /^[ 	]*include[ 	]/ d'
}

_ytools_format_config()
{
	sed '/^$/d; s/$/;/'
}

_ytools_format_section()
{
	_ytools_cat_section $* | _ytools_format_config
}

_ytools_source_section()
{
	eval `_ytools_cat_section $* | _ytools_format_config`
}

_uniq()
{
	sed -n 'G; s/\n/&&/; /^\([ -~]*\n\).*\n\1/d; s/\n//; h; P'
}

# -- exported utilities
ytools_log_err()
{
	echo "# $@" >&2
}

ytools_log_stdout()
{
	echo "# $@"
}

ytools_log_stderr()
{
	echo "# $@" >&2
}

ytools_log_syslog()
{
	logger -t $ytools_basename "$*"
}

ytools_log()
{
	local logger
	for logger in $ytools_loggers; do
		eval ytools_log_$logger "$@"
	done
}

ytools_empty_config()
{
	local o_verbose=""
	local o_section

	set -- `getopt 'vs:' $*`

	while [ "$1" != -- ]; do
		case $1 in
			-v)
				o_verbose=true;;
			-s)
				o_section=$2; shift;;
			*)
				ytools_log_err unknown option $1
				exit 1;;
		esac
		shift
	done
	shift

	_ytools_check_config_present $o_verbose || return 1

	[ ! -r "$1" ] && return
	[ "$o_verbose" ] && ytools_log o resetting config "\"$1\""
	if [ "$o_section" ]; then
		[ "$o_verbose" ] && ytools_log o resetting section "[$o_section]" of config "\"$1\""
	fi

	eval `_ytools_format_section $1 $o_section | sed 's/=[^;]*;/=;/g'`
}

ytools_empty_configs()
{
	local section
	local c
	local o_verbose=""
	local o_section
	local opts=""

	set -- `getopt 'vs:' $*`
	while [ "$1" != -- ]; do
		case $1 in
			-v)
				o_verbose=true
				opts="$opts -v"
				;;
			-s)
				o_section="-s $2"; shift;;
			*)
				ytools_log_err unknown option $1
				exit 1;;
		esac
		shift
	done
	shift

	_ytools_check_config_present $o_verbose || return 1

	for section in "" `ytools_config_sections`; do

		for c in $ytools_config_files; do

			ytools_empty_config -s "$section" section $opts $c

			if [ -d $c.d ]; then

				local dirconfs=`find $c.d  -maxdepth 1 -type f`
				local f
				for f in $dirconfs; do
					ytools_empty_config -s "$section" $opts $f
				done
			fi
		done
	done

	return 0
}

ytools_source_config()
{
	local o_verbose=""
	local o_section

	set -- `getopt 'vs:' $*`

	while [ "$1" != -- ]; do
		case $1 in
			-v)
				o_verbose=true
				;;
			-s)
				o_section=$2; shift;;
			*)
				ytools_log_err unknown option $1
				exit 1;;
		esac
		shift
	done
	shift

	_ytools_check_config_present $o_verbose || return 1

	if [ "$o_verbose" = true ]; then
		if [ "$o_section" ]; then
			ytools_log o sourcing section "[$o_section]" from config file "\"$1\""
		else
			ytools_log o sourcing config "\"$1\""
		fi

		_ytools_cat_section $1 $o_section
	fi

	_ytools_source_section $1 $o_section
}

ytools_source_configs()
{
	local c
	local source_opts=""
	local o_verbose=""

	set -- `getopt 'vs:' $*`

	while [ "$1" != -- ]; do
		case $1 in
			-v)
				o_verbose=true
				source_opts="$source_opts -v"
				;;
			-s)
				source_opts="$source_opts -s $2"
				shift;;
			*)
				ytools_log_err unknown option $1
				exit 1;;
		esac
		shift
	done
	shift

	_ytools_check_config_present $o_verbose || return 1

	for c in $ytools_config_files; do
		ytools_source_config $source_opts $c
		if [ -d $c.d ]; then
			local dirconfs=`find $c.d  -maxdepth 1 -type f`
			local f
			for f in $dirconfs; do
				ytools_source_config $source_opts $f
			done
		fi
	done
}

ytools_config_sections()
{
	local o_verbose=""
	local o_section
	local o_file
	local o_exact=false

	OPTIND=1
	while getopts ves:f: flag; do

		case $flag in
		v)
			o_verbose=true;;
		s)
			o_section="$OPTARG";;
		f)
			o_file="$OPTARG";;
		e)
			o_exact=true;;
		*)
			ytools_log_err "unknown option -$flag"
			exit 1;;
		esac

	done

	shift $(($OPTIND - 1))

	_ytools_check_config_present $o_verbose || return 1

	[ "$o_file" ] || o_file="$ytools_config_files"

	if [ "$o_exact" = false ]; then

		if [ "$o_section" ]; then
			sed "
				/^[ 	]*\[$o_section\.\(.*\)\]/ !d
				s/^[ 	]*\[$o_section\.\(.*\)\].*/\1/
			" $o_file 2>/dev/null | _uniq
		else
			sed "
				/^[ 	]*\[\(.*\)\]/ !d
				s/^[ 	]*\[\(.*\)\].*/\1/
			" $o_file 2>/dev/null | _uniq
		fi

	else

		if [ "$o_section" ]; then
			sed "
				/^[ 	]*\[$o_section\.\([^.]*\)\]/ !d
				s/^[ 	]*\[$o_section\.\([^.]*\)\].*/\1/
			" $o_file 2>/dev/null | _uniq
		else
			sed "
				/^[ 	]*\[\([^.]*\)\]/ !d
				s/^[ 	]*\[\([^.]*\)\].*/\1/
			" $o_file 2>/dev/null | _uniq
		fi
	fi

	return
}

ytools_cat()
{
	cat | sed 's/^[ 	]*|//'
}

ytools_waitpid()
{
	local pid=$1
	local t=5
	[ "$2" ] && t=$2

	while ((t > 0)); do
		[ -f /proc/$pid/status ] || {
			wait $pid
			return 0
		}
		sleep 1
		((t -= 1))
	done
	return 1
}

ytools_terminate()
{
	local pid
	for pid in $@; do
		[ -f /proc/$pid/status ] && {
			echo terminating process $pid
			kill $pid
			ytools_waitpid $pid || {

				echo "failed to normally terminate process $pid, killing it" >&2
				kill -9 $pid

				ytools_waitpid $pid || {
					echo "failed to kill process $pid" >&2
					return 1
				}
			}
		}
	done
	return 0
}

# -- exported variables
if [ "$ytools_functions_sourced" != "yes" ]; then

	ytools_functions_sourced="yes"

	[ -z "$ytools_basename" ] && ytools_basename=`echo "$0" | sed 's/^-*//' | xargs basename | sed 's/\.sh$//'`
	[ -z "$ytools_project" ] && ytools_project="ytools"
	[ -z "$ytools_rc" ] && ytools_rc="$ytools_basename"rc
	_ytools_probe_config_paths
	[ -z "$ytools_loggers" ] && ytools_loggers="stdout"
fi