Add paint-it-black.sh

scripts/paint-it-black.sh

+#!/bin/sh
+# set the background color in the default ubuntu bootsplash and grub
+# themes to black. i like a lot of things about the default ubuntu look
+# and feel but that weird purple certainly is not among those.
+#     -- felix@tribut.de
+
+sedfilter() {
+	SOURCE="$1"
+	FILTER="$2"
+	[ -w "$SOURCE" ] || { echo "$SOURCE not writeable" >&2; return 1; }
+	TEMPFILE="`mktemp`"
+
+	cp "$SOURCE" "$TEMPFILE" && sed -r "$FILTER" < "$TEMPFILE" > "$SOURCE"
+	RETCODE="$?"
+
+	if [ 0 -eq "$RETCODE" ]; then
+		echo "## Filter successfully applied to $SOURCE, the changes are as follows:" >&2
+		diff -u "$TEMPFILE" "$SOURCE" >&2
+		echo
+	fi
+
+	rm -f "$TEMPFILE"
+	return "$RETCODE"
+}
+
+sedfilter \
+	/lib/plymouth/themes/ubuntu-logo/ubuntu-logo.grub \
+	's/background_color [0-9]+,[0-9]+,[0-9]+/background_color 0,0,0/'
+sedfilter \
+	/lib/plymouth/themes/ubuntu-logo/ubuntu-logo.script \
+	's/^(Window.SetBackground(Top|Bottom)Color ?)\(0\.[0-9]{1,2}, 0\.[0-9]{1,2}, 0\.[0-9]{1,2}\)/\1(0.00, 0.00, 0.00)/'
+