Tddium post-build task to deploy into Heroku

tddium_post_build.rake

def cmd(c)
  system c
end

namespace :tddium do
  desc "post_build_hook"
  task :post_build_hook do
    # This build hook should only run after CI builds.
    #
    # There are other cases where we'd want to run something after every build,
    # or only after manual builds.
    return unless ENV["TDDIUM_MODE"] == "ci"
    return unless ENV["TDDIUM_BUILD_STATUS"] == "passed"

    dir = File.expand_path("~/.heroku/")
    heroku_email = ENV["HEROKU_EMAIL"]
    heroku_api_key = ENV["HEROKU_API_KEY"]
    current_branch = `git symbolic-ref HEAD 2>/dev/null | cut -d"/" -f 3-`.strip
    app_name = ENV["HEROKU_APP_NAME"]
    push_target = "git@heroku.com:#{app_name}.git"

    abort "invalid current branch" unless current_branch

    FileUtils.mkdir_p(dir) or abort "Could not create #{dir}"

    puts "Writing Heroku Credentials"
    File.open(File.join(dir, "credentials"), "w") do |f|
      f.write([heroku_email, heroku_api_key].join("\n"))
      f.write("\n")
    end

    File.open(File.expand_path("~/.netrc"), "a+") do |f|
      ['api', 'code'].each do |host|
        f.puts "machine #{host}.heroku.com"
        f.puts "  login #{heroku_email}"
        f.puts "  password #{heroku_api_key}"
      end
    end

    puts "Pushing to Heroku: #{push_target}..."
    cmd "git push #{push_target} HEAD:master --force" or abort "could not push to #{push_target}"

    Bundler.with_clean_env do
      puts "Running Heroku Migrations..."
      cmd "heroku run rake db:migrate --app #{app_name}" or abort "aborted migrations"

      puts "Restarting Heroku..."
      cmd "bundle exec heroku restart --app #{app_name}" or abort "aborted heroku restart"
    end
  end
end

I just found that I started getting a segfault from the JSON gem on restarting the dynos out of nowhere. Had to remove 'bundle exec' from the restart command to get it to work.

Why wrap the call to system in this cmd method? Just curious...

I tried this out with heroku_san and i think it's a lot cleaner:

https://gist.github.com/kbaum/068ac0317838b6f123d2

Let me know what you think.

thx!

You don't need to write these files when using HEROKU_API_KEY (that might depend on the heroku cli version) - https://gist.github.com/wvengen/895c45d4f03e1b3ae46f