ghc: remove cabal; erc: add carp checker

erc

@@ -45,17 +45,20 @@ meta_commands["carp"] = function()
   result = handle:read("*a")
   handle:close()
 
-  if result.len == 0 then return end
+  if result == "" then
+    message("Checks passed!")
+    return
+  end
   if starts(result, "Invalid path") then
     message("File not yet saved to disk!")
     return
   end
 
-  split = result:gmatch(":")
+  f, l, c, msg = string.match(result, "([^:]+):(%d+):(%d+) (.-)[\r\n].*")
 
-  if split[0] == file then
-    move(tonumber(split[1]), tonumber(split[2]))
-    message(table.concat(table.unpack(split, 3), ":"))
+  if f == file then
+    move(tonumber(l)-1, tonumber(c))
+    message(msg)
   end
 end