# Avoid any encoding problems
export LANG=C

# check if messages are to be printed using color
declare ALL_OFF= BOLD= BLUE= GREEN= RED= YELLOW=
if [[ -t 2 ]]; then
	# prefer terminal safe colored and bold text when tput is supported
	if tput setaf 0 &>/dev/null; then
		ALL_OFF="$(tput sgr0)"
		BOLD="$(tput bold)"
		BLUE="${BOLD}$(tput setaf 4)"
		GREEN="${BOLD}$(tput setaf 2)"
		RED="${BOLD}$(tput setaf 1)"
		YELLOW="${BOLD}$(tput setaf 3)"
	else
		ALL_OFF="\e[1;0m"
		BOLD="\e[1;1m"
		BLUE="${BOLD}\e[1;34m"
		GREEN="${BOLD}\e[1;32m"
		RED="${BOLD}\e[1;31m"
		YELLOW="${BOLD}\e[1;33m"
	fi
fi
readonly ALL_OFF BOLD BLUE GREEN RED YELLOW

plain() {
	local mesg=$1; shift
	printf "${BOLD}    ${mesg}${ALL_OFF}\n" "$@" >&2
}

msg() {
	local mesg=$1; shift
	printf "${GREEN}==>${ALL_OFF}${BOLD} ${mesg}${ALL_OFF}\n" "$@" >&2
}

msg2() {
	local mesg=$1; shift
	printf "${BLUE}  ->${ALL_OFF}${BOLD} ${mesg}${ALL_OFF}\n" "$@" >&2
}

warning() {
	local mesg=$1; shift
	printf "${YELLOW}==> $(gettext "WARNING:")${ALL_OFF}${BOLD} ${mesg}${ALL_OFF}\n" "$@" >&2
}

error() {
	local mesg=$1; shift
	printf "${RED}==> $(gettext "ERROR:")${ALL_OFF}${BOLD} ${mesg}${ALL_OFF}\n" "$@" >&2
}

stat_busy() {
	local mesg=$1; shift
	printf "${GREEN}==>${ALL_OFF}${BOLD} ${mesg}...${ALL_OFF}" "$@" >&2
}

stat_done() {
	printf "${BOLD}$(gettext "done")${ALL_OFF}\n" >&2
}

_setup_workdir=false
setup_workdir() {
	[[ -z ${WORKDIR:-} ]] && WORKDIR=$(mktemp -d --tmpdir "${0##*/}.XXXXXXXXXX")
	_setup_workdir=true
	trap 'trap_abort' INT QUIT TERM HUP
	trap 'trap_exit' EXIT
}

cleanup() {
	if [[ -n ${WORKDIR:-} ]] && $_setup_workdir; then
		rm -rf "$WORKDIR"
	fi
	[[ -n ${1:-} ]] && exit $1
}

abort() {
	msg 'Aborting...'
	cleanup 0
}

trap_abort() {
	trap - EXIT INT QUIT TERM HUP
	abort
}

trap_exit() {
	trap - EXIT INT QUIT TERM HUP
	cleanup
}

die() {
	(( $# )) && error "$@"
	cleanup 1
}

##
#  usage : in_array( $needle, $haystack )
# return : 0 - found
#          1 - not found
##
in_array() {
	local needle=$1; shift
	local item
	for item in "$@"; do
		[[ $item = $needle ]] && return 0 # Found
	done
	return 1 # Not Found
}

##
#  usage : get_full_version( [$pkgname] )
# return : full version spec, including epoch (if necessary), pkgver, pkgrel
##
get_full_version() {
	# set defaults if they weren't specified in buildfile
	pkgbase=${pkgbase:-${pkgname[0]}}
	epoch=${epoch:-0}
	if [[ -z $1 ]]; then
		if [[ $epoch ]] && (( ! $epoch )); then
			echo $pkgver-$pkgrel
		else
			echo $epoch:$pkgver-$pkgrel
		fi
	else
		for i in pkgver pkgrel epoch; do
			local indirect="${i}_override"
			eval $(declare -f package_$1 | sed -n "s/\(^[[:space:]]*$i=\)/${i}_override=/p")
			[[ -z ${!indirect} ]] && eval ${indirect}=\"${!i}\"
		done
		if (( ! $epoch_override )); then
			echo $pkgver_override-$pkgrel_override
		else
			echo $epoch_override:$pkgver_override-$pkgrel_override
		fi
	fi
}

##
#  usage : lock( $fd, $file, $message )
##
lock() {
	local fd=$1
	local file=$2
	local mesg=("${@:3}")

	# Only reopen the FD if it wasn't handed to us
	if [[ "$(readlink -f /dev/fd/$fd)" != "$(readlink -f "$file")" ]]; then
		mkdir -p "${file%/*}"
		eval "exec $fd>"'"$file"'
	fi

	if ! flock -n $fd; then
		stat_busy "${mesg[@]}"
		flock $fd
		stat_done
	fi
}

##
#  usage : slock( $fd, $file, $message )
##
slock() {
	local fd=$1
	local file=$2
	local mesg=("${@:3}")

	# Only reopen the FD if it wasn't handed to us
	if [[ "$(readlink -f /dev/fd/$fd)" != "$(readlink -f "$file")" ]]; then
		mkdir -p "${file%/*}"
		eval "exec $fd>"'"$file"'
	fi

	eval "exec $fd>"'"$file"'
	if ! flock -sn $fd; then
		stat_busy "${mesg[@]}"
		flock -s $fd
		stat_done
	fi
}

##
#  usage : lock_close( $fd )
##
lock_close() {
	local fd=$1
	eval "exec $fd>&-"
}