initial program to extract GPL source from running Moby for #45

Signed-off-by: Justin Cormack <justin.cormack@docker.com>

licensing/gpl.lua

@@ -0,0 +1,18 @@
+#!/usr/bin/lua
+
+p = {}
+f = io.open("/lib/apk/db/installed")
+
+for line in f:lines() do
+	if line == "" then
+		if p.L:match("[Gg][Pg][Ll]") then
+			print(p.P, p.L, p.c)
+		end
+		p = {}
+	else
+		k, v = line:match("(%a):(.*)")
+		if k then
+			p[k] = v
+		end
+	end
+end