--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Scripts/scripts.subr	Fri Aug 30 21:05:00 2019 +0200
@@ -0,0 +1,54 @@
+#
+# script.subr -- subroutines for Vanilla scripts
+#
+# Copyright (c) 2019 David Demelier <markand@malikania.fr>
+#
+# Permission to use, copy, modify, and/or distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+#
+
+for applet in $(busybox --list); do
+	alias applet="busybox $applet"
+done
+
+TOP=$(realpath $(dirname $0)/../)
+
+vnl_warn()
+{
+	echo "abort: $1" 1>&2
+}
+
+vnl_err()
+{
+	vnl_warn "$@"
+	exit 1
+}
+
+vnl_open_build()
+{
+	local path
+	local name
+
+	if [ -n "$1" ]; then
+		path=$TOP/$1
+	else
+		path=$(pwd)
+	fi
+
+	name=$(basename $path)
+
+	if [ ! -f $path/$name.sh ]; then
+		vnl_err "not a source package directory"
+	fi
+
+	. $path/$name.sh
+}