Detect variables used in Mustache templates.

detect-mustache.rb

#!/usr/bin/env ruby

fn = ARGV[0]

if !fn
  puts "Usage: #{$0} file.mustache"
  puts
  exit
end

fields = []
File.read(fn).split("\n").each do |l|
  if l =~ /{{{(.+?)}}}/ || l =~ /{{(.+?)}}/
    next if $1[0,1] == '/'
    field = $1

    field = field[1..-1] if field[0,1] == '#'
    field = field[1..-1] if field[0,1] == '^'
    fields << field
  end
end

puts fields.sort.uniq.join("\n")
puts