[NEW] pacpruner: Added pacman pruner script and usage calculator

scripts/pacpruner-calculator

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+
+read -d '' usage <<EOUSAGE
+This script calculates the amount of space (in kibibytes) taken by the files
+referenced in a newline-delimited listing.
+
+USAGE:  $0 FILE_LIST
+EOUSAGE
+
+. "$(dirname $0)/util/logging.bash"
+
+[ -z "$1" ] && dedcat "$usage"
+
+read -d '' PERL <<EOPERL
+print $(cat "$1" | xargs du | awk '{print $1}' | tr $'\n' '+' | sed 's/+$//')
+EOPERL
+
+perl -e "$PERL"' . "\n";'