1 files changed, 186 insertions, 0 deletions
diff --git a/lib/common.sh b/lib/common.sh
new file mode 100644
index 0000000..d6fbe7c
--- /dev/null
+++ b/lib/common.sh
@@ -0,0 +1,186 @@
+# Avoid any encoding problems
+export LANG=C
+
+# check if messages are to be printed using color
+unset 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}==> WARNING:${ALL_OFF}${BOLD} ${mesg}${ALL_OFF}\n" "$@" >&2
+}
+
+error() {
+	local mesg=$1; shift
+	printf "${RED}==> 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 "${BOLD}done${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 : lock_open_write( $fd, $path, $wait_message )
+##
+lock_open_write() {
+	local fd=$1
+	local path=$2
+	local msg=$3
+
+	# Only reopen the FD if it wasn't handed to us
+	if [[ $(readlink -f /dev/fd/$fd) != "${path}.lock" ]]; then
+		mkdir -p "${path%/*}"
+		eval "exec $fd>${path}.lock"
+	fi
+
+	if ! flock -n $fd; then
+		stat_busy "$msg"
+		flock $fd
+		stat_done
+	fi
+}
+
+##
+#  usage : lock_open_read( $fd, $path, $wait_message )
+##
+lock_open_read() {
+	local fd=$1
+	local path=$2
+	local msg=$3
+
+	# Only reopen the FD if it wasn't handed to us
+	if [[ $(readlink -f /dev/fd/$fd) != "${path}.lock" ]]; then
+		mkdir -p "${path%/*}"
+		eval "exec $fd>${path}.lock"
+	fi
+
+	if ! flock -sn $fd; then
+		stat_busy "$msg"
+		flock -s $fd
+		stat_done
+	fi
+}
+
+
+##
+#  usage : lock_close( $fd )
+##
+lock_close() {
+	local fd=$1
+	eval "exec $fd>&-"
+}
+
+##
+#  usage : get_full_version( [$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
+}