Module: Heroku::Updater

Defined in:
lib/heroku/updater.rb

Class Method Summary collapse

Class Method Details

.autoupdate? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/heroku/updater.rb', line 71

def self.autoupdate?
  true
end

.background_update! ⇒ Object 



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# File 'lib/heroku/updater.rb', line 151

def self.background_update!
  # if we've updated in the last 300 seconds, dont try again
  if File.exists?(last_autoupdate_path)
    return if (Time.now.to_i - File.mtime(last_autoupdate_path).to_i) < 300
  end
  log_path = File.join(Heroku::Helpers.home_directory, '.heroku', 'autoupdate.log')
  FileUtils.mkdir_p File.dirname(log_path)
  heroku_binary = File.expand_path($0)
  pid = if defined?(RUBY_VERSION) and RUBY_VERSION =~ /^1\.8\.\d+/
    fork do
      exec("\"#{heroku_binary}\" update &> #{log_path} 2>&1")
    end
  else
    spawn("\"#{heroku_binary}\" update", {:err => log_path, :out => log_path})
  end
  Process.detach(pid)
  FileUtils.mkdir_p File.dirname(last_autoupdate_path)
  FileUtils.touch last_autoupdate_path
end

.check_disabled! ⇒ Object 



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# File 'lib/heroku/updater.rb', line 48

def self.check_disabled!
  if disable
    Heroku::Helpers.error(disable)
  end
end

.client_version_from_path(path) ⇒ Object 



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# File 'lib/heroku/updater.rb', line 34

def self.client_version_from_path(path)
  version_file = File.join(path, "lib/heroku/version.rb")
  if File.exists?(version_file)
    File.read(version_file).match(/VERSION = "([^"]+)"/)[1]
  else
    '0.0.0'
  end
end

.compare_versions(first_version, second_version) ⇒ Object 



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# File 'lib/heroku/updater.rb', line 127

def self.compare_versions(first_version, second_version)
  first_version.split('.').map {|part| Integer(part) rescue part} <=> second_version.split('.').map {|part| Integer(part) rescue part}
end

.disable(message = nil) ⇒ Object 



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# File 'lib/heroku/updater.rb', line 43

def self.disable(message=nil)
  @disable = message if message
  @disable
end

.error(message) ⇒ Object

Raises:



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# File 'lib/heroku/updater.rb', line 8

def self.error(message)
  raise Heroku::Command::CommandFailed.new(message)
end

.inject_libpath ⇒ Object 



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# File 'lib/heroku/updater.rb', line 131

def self.inject_libpath
  old_version = client_version_from_path(installed_client_path)
  new_version = client_version_from_path(updated_client_path)

  if compare_versions(new_version, old_version) > 0
    $:.unshift File.join(updated_client_path, "lib")
    vendored_gems = Dir[File.join(updated_client_path, "vendor", "gems", "*")]
    vendored_gems.each do |vendored_gem|
      $:.unshift File.join(vendored_gem, "lib")
    end
    load('heroku/updater.rb') # reload updated updater
  end

  background_update!
end

.installed_client_path ⇒ Object 



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# File 'lib/heroku/updater.rb', line 16

def self.installed_client_path
  File.expand_path("../../..", __FILE__)
end

.last_autoupdate_path ⇒ Object 



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# File 'lib/heroku/updater.rb', line 147

def self.last_autoupdate_path
  File.join(Heroku::Helpers.home_directory, ".heroku", "autoupdate.last")
end

.latest_local_version ⇒ Object 



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# File 'lib/heroku/updater.rb', line 24

def self.latest_local_version
  installed_version = client_version_from_path(installed_client_path)
  updated_version = client_version_from_path(updated_client_path)
  if compare_versions(updated_version, installed_version) > 0
    updated_version
  else
    installed_version
  end
end

.update(url, autoupdate = false) ⇒ Object 



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# File 'lib/heroku/updater.rb', line 75

def self.update(url, autoupdate=false)
  wait_for_lock(updating_lock_path, 5) do
    require "excon"
    require "heroku"
    require "heroku/excon"
    require "tmpdir"
    require "zip/zip"

    latest_version = Excon.get_with_redirect("http://assets.heroku.com/heroku-client/VERSION", :nonblock => false).body.chomp

    if compare_versions(latest_version, latest_local_version) > 0
      Dir.mktmpdir do |download_dir|
        File.open("#{download_dir}/heroku.zip", "wb") do |file|
          file.print Excon.get_with_redirect(url, :nonblock => false).body
        end

        hash = Digest::SHA256.file("#{download_dir}/heroku.zip").hexdigest
        official_hash = Excon.get_with_redirect("https://toolbelt.heroku.com/update/hash", :nonblock => false).body.chomp

        error "Update hash signature mismatch" unless hash == official_hash

        Zip::ZipFile.open("#{download_dir}/heroku.zip") do |zip|
          zip.each do |entry|
            target = File.join(download_dir, entry.to_s)
            FileUtils.mkdir_p File.dirname(target)
            zip.extract(entry, target) { true }
          end
        end

        FileUtils.rm "#{download_dir}/heroku.zip"

        old_version = latest_local_version
        new_version = client_version_from_path(download_dir)

        if compare_versions(new_version, old_version) < 0 && !autoupdate
          Heroku::Helpers.error("Installed version (#{old_version}) is newer than the latest available update (#{new_version})")
        end

        FileUtils.rm_rf updated_client_path
        FileUtils.mkdir_p File.dirname(updated_client_path)
        FileUtils.cp_r  download_dir, updated_client_path

        new_version
      end
    else
      false # already up to date
    end
  end
ensure
  FileUtils.rm_f(updating_lock_path)
end

.updated_client_path ⇒ Object 



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# File 'lib/heroku/updater.rb', line 20

def self.updated_client_path
  File.join(Heroku::Helpers.home_directory, ".heroku", "client")
end

.updating_lock_path ⇒ Object 



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# File 'lib/heroku/updater.rb', line 12

def self.updating_lock_path
  File.join(Heroku::Helpers.home_directory, ".heroku", "updating")
end

.wait_for_lock(path, wait_for = 5, check_every = 0.5) ⇒ Object 



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# File 'lib/heroku/updater.rb', line 54

def self.wait_for_lock(path, wait_for=5, check_every=0.5)
  start = Time.now.to_i
  while File.exists?(path)
    sleep check_every
    if (Time.now.to_i - start) > wait_for
      Heroku::Helpers.error "Unable to acquire update lock"
    end
  end
  begin
    FileUtils.touch path
    ret = yield
  ensure
    FileUtils.rm_f path
  end
  ret
end