Initial code for convert positions reads a file name from the command

line and attempts to connect to it as a SQLite3 database.

convert-positions.rkt

@@ -0,0 +1,25 @@
+#! /usr/bin/env racket
+#lang racket
+(require db racket/cmdline "world/blocks.rkt")
+
+;; #### Functions
+
+;; String -> Database connection
+;; Take the file-name of a Minetest world as a string, return a SQL
+;; database connection
+
+(define (open-minetest-world world)
+  (let ([minetest-world (sqlite3-connect #:database world)])
+    (if (connected? minetest-world)
+        minetest-world
+        (raise (string-append "Could not open " world)))))
+
+;; Command line -> Database Connection
+;; Parse command line options, use a helper funtion to return a database
+;; connection or error-out as appropriate.
+
+(define minetest-world-db
+  (command-line
+   #:program "Convert Positions"
+   #:args (world)
+   (open-minetest-world world)))