Rake tasks to fetch/push aws elasticbeanstalk env vars on environment.

eb_env.rake

namespace :eb do
  namespace :env do
    desc "Fetch env vars from eb"
    task :fetch, [:envname] do |t, params|
      lines = `eb printenv #{params[:envname]}`.strip.split(/\r?\n/)
      lines.shift if lines[0] =~ /Environment Variables:/
      hash = {}
      lines.sort.each do |line|
        if line =~ /^\s+(.+)\s+=\s+(.+)$/
          hash[$1] = $2
        end
      end
      File.open("eb-env.yml", 'w') { |f| f.write hash.to_yaml }
      puts "#{params[:envname]}'s env vars have been saved to 'eb-env.yml'"
    end
    desc "Push env vars to eb"
    task :push, [:envname] do |t, params|
      hash = YAML.load_file("eb-env.yml")
      varkeys = []
      hash.each do |key, value|
        varkeys << "#{key}=#{value}"
      end
      cmd = "eb setenv #{varkeys.join(' ')} -e #{params[:envname]}"
      puts cmd
      puts `#{cmd}`
    end
  end
end