Commit in-progress work to request sanity check

script/sort-submodules

@@ -1,21 +1,7 @@
 #!/usr/bin/env ruby
 
 require "optparse"
-
-ROOT = File.expand_path "../../", __FILE__
-
-
-# Extract and sort a list of submodules
-def sort_entries(file_data)
-  submodules = []
-  file_data.scan(/(^\[submodule[^\n]+\n)((?:\t[^\n]+\n)+)/).each do |head, body|
-    path = body.match(/^\tpath\s*=\s*\K(.+)$/)[0]
-    submodules << [path, head + body]
-  end
-  submodules.sort! { |a,b| a[0] <=> b[0] }
-  submodules.collect { |i| i[1] }
-end
-
+require_relative "./helpers/submodule"
 
 usage = <<-EOH
 Usage:
@@ -28,6 +14,7 @@ Examples:
 EOH
 
 $testing = false
+
 OptionParser.new do |opts|
   opts.banner = usage
   opts.on("-h", "--help") do
@@ -39,12 +26,11 @@ OptionParser.new do |opts|
   end
 end.parse!
 
-
-unsorted = File.read("#{ROOT}/.gitmodules")
-sorted = sort_entries(unsorted).join
+unsorted = read ".gitmodules"
+sorted = Submodule.list.join
 
 if $testing
   exit unsorted == sorted
 else
-  File.write "#{ROOT}/.gitmodules", sorted
+  write ".gitmodules", sorted
 end