Class: Backup::Dependency

Inherits:
Object
  • Object
show all
Defined in:
lib/backup/dependency.rb

Overview

A little self-contained gem manager for Backup. Rather than specifying hard dependencies in the gemspec, forcing users to install gems they do not want/need, Backup will notify them when a gem has not been installed, or when the gem’s version is incorrect, and provide the command to install the gem. These dependencies are dynamically loaded in the Gemfile

Class Method Summary collapse

Class Method Details

.all ⇒ Object

Returns a hash of dependencies that Backup requires in order to run every available feature



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# File 'lib/backup/dependency.rb', line 16

def self.all
  {
    'fog' => {
      :require => 'fog',
      :version => '>= 0.11.0',
      :for     => 'Amazon S3, Rackspace Cloud Files (S3, CloudFiles Storages)'
    },

    'dropbox-sdk' => {
      :require => 'dropbox_sdk',
      :version => '~> 1.2.0',
      :for     => 'Dropbox Web Service (Dropbox Storage)'
    },

    'net-sftp' => {
      :require => 'net/sftp',
      :version => '~> 2.0.5',
      :for     => 'SFTP Protocol (SFTP Storage)'
    },

    'net-scp' => {
      :require => 'net/scp',
      :version => '~> 1.0.4',
      :for     => 'SCP Protocol (SCP Storage)'
    },

    'net-ssh' => {
      :require => 'net/ssh',
      :version => '~> 2.1.4',
      :for     => 'SSH Protocol (SSH Storage)'
    },

    'mail' => {
      :require => 'mail',
      :version => '>= 2.4.0',
      :for     => 'Sending Emails (Mail Notifier)'
    },

    'twitter' => {
      :require => 'twitter',
      :version => '>= 1.7.1',
      :for     => 'Sending Twitter Updates (Twitter Notifier)'
    },

    'httparty' => {
      :require => 'httparty',
      :version => '~> 0.7.4',
      :for     => 'Sending Http Updates'
    },

    'json' => {
      :require => 'json',
      :version => '~> 1.5.1',
      :for     => 'Parsing JSON for HTTParty'
    },

    'prowler' => {
      :require => 'prowler',
      :version => '>= 1.3.1',
      :for     => 'Sending iOS push notifications (Prowl Notifier)'
    },

    'hipchat' => {
      :require => 'hipchat',
      :version => '~> 0.4.1',
      :for => 'Sending notifications to Hipchat'
    },

    'parallel' => {
      :require => 'parallel',
      :version => '~> 0.5.12',
      :for => 'Adding concurrency to Cloud-based syncers.'
    }
  }
end

.load(name) ⇒ Object

Attempts to load the specified gem (by name and version). If the gem with the correct version cannot be found, it’ll display a message to the user with instructions on how to install the required gem



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# File 'lib/backup/dependency.rb', line 96

def self.load(name)
  begin
    gem(name, all[name][:version])
    require(all[name][:require])
  rescue LoadError
    Logger.error Errors::Dependency::LoadError.new(<<-EOS)
      Dependency missing
      Dependency required for:
      #{all[name][:for]}
      To install the gem, issue the following command:
      > gem install #{name} -v '#{all[name][:version]}'
      Please try again after installing the missing dependency.
    EOS
    exit 1
  end
end