Begin working on withdrawing from system

client.lua

@@ -1,6 +1,10 @@
 local w = require "lib"
 local d = require "luadash"
 
+local conf = w.load_config({
+    "network_name"
+})
+
 local function split_at_spaces(s)
     local t = {}
     for i in string.gmatch(s, "%S+") do
@@ -14,14 +18,35 @@ local function first_letter(s)
 end
 
 local usage = [[
-    Welcome to the Wyvern CLI Client, "Because Gollark Was Lazy".
+Welcome to the Wyvern CLI Client, "Because Gollark Was Lazy".
-    All commands listed below can also be accessed using single-letter shortcuts for convenience.
+All commands listed below can also be accessed using single-letter shortcuts for convenience.
+
+withdraw [quantity] [name] - withdraw [quantity] items with display names close to [name] from storage
+withdraw [items] - as above but withdraws all available matching items
 ]]
 
 local commands = {
-    help = function() print(usage) end
+    help = function() return usage end,
+    withdraw = function(number, ...)
+        local query_tokens = {...}
+        local quantity = math.huge
+        if tonumber(number) ~= nil then 
+            quantity = tonumber(number)
+        else
+            table.insert(query_tokens, 1, numbr)
+        end
+        local query = table.concat(query_tokens, " ") -- unsplit query
+
+        local items = w.query_by_type("storage", {
+            type = "search",
+            query = query
+        })
+    end
 }
 
+w.init()
+
+if not turtle then error "Wyvern CLI must be run on a turtle." end
 
 print "Wyvern CLI Client"
 
@@ -41,5 +66,6 @@ while true do
         print("Command", command, "not found.")
     end
 
-    fn(table.unpack(args))
+    local ok, result = pcall(fn(table.unpack(args)))
+    if result then textutils.pagedPrint(result) end
 end

lib.lua

@@ -246,4 +246,19 @@ local function init()
     d.map(find_peripherals(function(type, name, wrapped) return type == "modem" end), function(p) rednet.open(p.name) end)
 end
 
+-- Rust-style unwrap. If x is a response type, will take out its contents and return them - if error, will crash and print it, with msg if provided
+local function unwrap(x, msg)
+    if not x or type(x) ~= "table" or not x.type then x = errors.make(errors.INTERNAL, "Error/response object is invalid. This is probably a problem with the node being contacted.") end
+
+    if x.type == "error" then
+        local text = "An error occured"
+        if msg then text .. " " .. msg
+        else text = text .. "!" end
+        text = text .. ".\nDetails: " .. errors.format(x.error)
+        error(text)
+    elseif x.type == "response" then
+        return x.response
+    end
+end
+
 return { errors = errors, serve = serve, query_by_ID = query_by_ID, query_by_type = query_by_type, get_internal_identifier = get_internal_identifier, load_config = load_config, find_peripherals = find_peripherals, init = init, collate = collate, satisfied = satisfied, collate_stacks = collate_stacks }