Class: Cronenberg::Config

Inherits:
Object
  • Object
show all
Defined in:
lib/cronenberg/config.rb

Constant Summary collapse

REQUIRED_VALUES = 
{
	names: [:host, :user, :password],
	env_vars: ['VCENTER_SERVER', 'VCENTER_USER', 'VCENTER_PASSWORD'],
}

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config_file_location = nil) ⇒ Config

Returns a new instance of Config.



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# File 'lib/cronenberg/config.rb', line 16

def initialize(config_file_location=nil)
    settings = process_environment_variables || process_config_file(config_file_location || default_config_location)
	if settings.nil?
		raise 'You must provide credentials in either environment variables or a config file.'
	else
		settings = settings.delete_if { |k, v| v.nil? }
		missing = REQUIRED_VALUES[:names] - settings.keys
		unless missing.empty?
			message = 'To use this module you must provide the following settings:'
			missing.each do |var|
				message += " #{var}"
			end
			raise message
		end
		@host = settings[:host]
		@user = settings[:user]
		@password = settings[:password]
		@datacenter = settings[:datacenter_name]
		@insecure = settings[:insecure].nil? ? false : settings[:insecure]
		@ssl = settings[:ssl].nil? ? true : settings[:ssl]
		@port = settings[:port]
	end

end

Instance Attribute Details

#datacenter ⇒ Object (readonly)

Returns the value of attribute datacenter.



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# File 'lib/cronenberg/config.rb', line 10

def datacenter
  @datacenter
end

#host ⇒ Object (readonly)

Returns the value of attribute host.



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# File 'lib/cronenberg/config.rb', line 10

def host
  @host
end

#insecure ⇒ Object (readonly)

Returns the value of attribute insecure.



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# File 'lib/cronenberg/config.rb', line 10

def insecure
  @insecure
end

#password ⇒ Object (readonly)

Returns the value of attribute password.



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# File 'lib/cronenberg/config.rb', line 10

def password
  @password
end

#port ⇒ Object (readonly)

Returns the value of attribute port.



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# File 'lib/cronenberg/config.rb', line 10

def port
  @port
end

#ssl ⇒ Object (readonly)

Returns the value of attribute ssl.



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# File 'lib/cronenberg/config.rb', line 10

def ssl
  @ssl
end

#user ⇒ Object (readonly)

Returns the value of attribute user.



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# File 'lib/cronenberg/config.rb', line 10

def user
  @user
end

Instance Method Details

#default_config_location ⇒ Object 



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# File 'lib/cronenberg/config.rb', line 12

def default_config_location
	File.join(Dir.home, '.vcenter.conf')
end

#process_config_file(file_path) ⇒ Object 



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# File 'lib/cronenberg/config.rb', line 61

def process_config_file(file_path)
	file_present = File.file?(file_path)
	unless file_present
		nil
	else
		begin
			configuration = YAML.load_file(file_path)
		rescue Psych::SyntaxError => e
			raise "Your configuration file at #{file_path} is invalid. The error from the YAML parser is:\n #{e.message}"
		end
		vsphere_config = configuration['vcenter']

      raise "Invalid configuration file, missing vcenter key." unless vsphere_config.keys.first == 'vcenter' 

		required = REQUIRED_VALUES[:names].map { |var| var.to_s }
		missing = required - vsphere_config.keys
		if missing.size < required.size
			{
				host: vsphere_config['host'],
				user: vsphere_config['user'],
				password: vsphere_config['password'],
				datacenter_name: vsphere_config['datacenter'],
				insecure: vsphere_config['insecure'],
				port: vsphere_config['port'],
				ssl: vsphere_config['ssl'],
			}
		else
			nil
		end
	end
end

#process_environment_variables ⇒ Object 



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# File 'lib/cronenberg/config.rb', line 41

def process_environment_variables
	required = REQUIRED_VALUES[:env_vars]
	missing = required - ENV.keys
	if missing.size < required.size
		{
			host: ENV['VCENTER_SERVER'],
			user: ENV['VCENTER_USER'],
			password: ENV['VCENTER_PASSWORD'],
			datacenter_name: ENV['VCENTER_DATACENTER'],
			insecure: ENV['VCENTER_INSECURE'],
			port: ENV['VCENTER_PORT'],
			ssl: ENV['VCENTER_SSL'],
		}
	else
		nil
	end
end