1 files changed, 71 insertions, 0 deletions
diff --git a/system-build/functions/stagefile.sh b/system-build/functions/stagefile.sh
new file mode 100755
index 0000000..c1be52c
--- /dev/null
+++ b/system-build/functions/stagefile.sh
@@ -0,0 +1,71 @@
+#!/bin/sh
+
+## live-build(7) - System Build Scripts
+## Copyright (C) 2006-2015 Daniel Baumann <mail@daniel-baumann.ch>
+##
+## This program comes with ABSOLUTELY NO WARRANTY; for details see COPYING.
+## This is free software, and you are welcome to redistribute it
+## under certain conditions; see COPYING for details.
+
+
+Check_stagefile ()
+{
+	FILE="${1}"
+	NAME="$(basename ${1})"
+
+	# Checking stage file
+	if [ -f "${FILE}" ]
+	then
+		if [ "${_FORCE}" != "true" ]
+		then
+			# Skipping execution
+			Echo_warning "skipping %s, already done" "${NAME}"
+			exit 0
+		else
+			# Forcing execution
+			Echo_message "forcing %s" "${NAME}"
+			rm -f "${FILE}"
+		fi
+	fi
+}
+
+Create_stagefile ()
+{
+	FILE="${1}"
+	DIRECTORY="$(dirname ${1})"
+
+	# Creating stage directory
+	mkdir -p "${DIRECTORY}"
+
+	# Creating stage file
+	touch "${FILE}"
+}
+
+Require_stagefile ()
+{
+	NAME="$(basename ${0})"
+	FILES="${@}"
+	NUMBER="$(echo ${@} | wc -w)"
+
+	for FILE in ${FILES}
+	do
+		# Find at least one of the required stages
+		if [ -f ${FILE} ]
+		then
+			CONTINUE="true"
+			NAME="${NAME} $(basename ${FILE})"
+		fi
+	done
+
+	if [ "${CONTINUE}" != "true" ]
+	then
+		if [ "${NUMBER}" -eq 1 ]
+		then
+			Echo_error "%s: %s missing" "${NAME}" "${FILE}"
+		else
+			Echo_error "%s: one of %s is missing" "${NAME}" "${FILES}"
+		fi
+
+		exit 1
+	fi
+}