Class: AppEngine::Admin::UpdateCheck

Inherits:
Object
  • Object
show all
Defined in:
lib/appengine-tools/update_check.rb

Constant Summary collapse

NAG_FILE = 
"~/.appcfg_rb_nag"
MAX_NAG_FREQUENCY = 
60 * 60 * 24 * 7
DEFAULT_URL = 
'http://appengine-jruby.googlecode.com/hg/updatecheck'

Instance Method Summary collapse

Constructor Details

#initialize(approot, url = nil, nag_file = nil) ⇒ UpdateCheck

Returns a new instance of UpdateCheck.



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# File 'lib/appengine-tools/update_check.rb', line 33

def initialize(approot, url=nil, nag_file=nil)
  @url = url || DEFAULT_URL
  @approot = approot
  @nag_file = nag_file || File.expand_path(NAG_FILE)
end

Instance Method Details

#can_nag? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/appengine-tools/update_check.rb', line 112

def can_nag?
  parse_nag_file['opt_in']
end

#check_for_updates ⇒ Object 



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# File 'lib/appengine-tools/update_check.rb', line 65

def check_for_updates
  local = local_versions
  unless local['google-appengine']
    puts '=> Skipping update check'
    return
  end
  latest = remote_versions
  local.each do |name, version|
    current = latest[name]
    if version && version < current
      prefix = if name == 'google-appengine'
        update_msg = "=> Please run sudo gem update google-appengine."
      else
        update_msg = "=> Please update your Gemfile."
      end
      puts "=> There is a new version of #{name}: #{current} " +
          "(You have #{version})"
      puts update_msg
    end
  end
end

#find_gem_version(name) ⇒ Object 



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# File 'lib/appengine-tools/update_check.rb', line 48

def find_gem_version(name)
  IO.foreach("#{@approot}/.gems/bundler_gems/environment.rb") do |line|
    if line =~ %r(/gems/#{name}-(\w+\.\w+.\w+)[/"])
      return Gem::Version.new($1)
    end
  end rescue nil
  nil
end

#local_versions ⇒ Object 



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# File 'lib/appengine-tools/update_check.rb', line 39

def local_versions
  sdk_version = Gem::Version.new(AppEngine::VERSION) rescue nil
  {
    'google-appengine' => sdk_version,
    'appengine-apis' => find_gem_version('appengine-apis'),
    'dm-appengine' => find_gem_version('dm-appengine'),
  }
end

#nag ⇒ Object 



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# File 'lib/appengine-tools/update_check.rb', line 101

def nag
  nag = parse_nag_file
  return if Time.now.to_i - nag['timestamp'] < MAX_NAG_FREQUENCY
  check_for_updates
  nag['timestamp'] = Time.now.to_i
  write_nag_file(nag)
rescue OpenURI::HTTPError, Errno::ENOENT
  # check_for_updates will raise an error if we're not online
  # just ignore it, and don't update the nag timestamp.
end

#parse_nag_file ⇒ Object 



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# File 'lib/appengine-tools/update_check.rb', line 87

def parse_nag_file
  @nag ||= if File.exist?(@nag_file)
    YAML.load_file(@nag_file)
  else
    {'opt_in' => true, 'timestamp' => 0}
  end
end

#remote_versions ⇒ Object 



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# File 'lib/appengine-tools/update_check.rb', line 57

def remote_versions
  versions = YAML.load(open(@url).read)
  versions.inject({}) do |versions, (name, version)|
    versions[name] = Gem::Version.new(version)
    versions
  end
end

#write_nag_file(options) ⇒ Object 



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# File 'lib/appengine-tools/update_check.rb', line 95

def write_nag_file(options)
  open(@nag_file, 'w') do |file|
    file.write(YAML.dump(options))
  end
end