Add script to check dependencies

scripts/admin/check-package-dependencies.rb

@@ -0,0 +1,26 @@
+#! /usr/bin/env ruby
+
+# This script takes two arguments:
+# 1. The name of a package - ex. ejson
+# 2. The name of an export - ex. EJSON
+# It makes sure that if the export appears somewhere in package source code, the
+# name of the package appears somewhere in package.js for that package.
+
+root = File.join(File.dirname(__FILE__), "..", "..");
+
+Dir.chdir(root)
+
+file_list = `git grep -l '#{ARGV[0]}' packages/`.lines
+package_list = file_list.map do |filename|
+  filename.split("/")[1]
+end
+
+package_list = package_list.uniq
+
+package_list.each do |p|
+  unless File.open("packages/#{p}/package.js").read.include? ARGV[1]
+    puts "'#{ARGV[0]}' appears in #{p} but '#{ARGV[1]}' not in package.js. Files:"
+    puts `git grep -l '#{ARGV[0]}' packages/#{p}/`
+    puts ""
+  end
+end