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module Fission
class VMConfiguration
# Internal: Creates a new VMConfiguration object. This accepts a VM object
#
# vm - An instance of VM
#
# Examples:
#
# Fission::VMConfiguration.new @my_vm
#
# Returns a new VMConfiguration object
def initialize(vm)
@vm = vm
end
# Internal: Gathers the the configuration data for the VM. This essentially
# parses the key/value pairs from the configuration file (.vmx) into a Hash.
#
# Exaples:
#
# @vm_config.config_data.data
# # => { 'memsize' => '384', 'ethernet0.present' => 'TRUE',... }
#
# Returns a Response object with the result.
# If successful, the Response's data attribute will be a Hash. All keys and
# values are represented as a String (even when the value in the
# configuration file is 'TRUE'). If a value is an empty string in the
# configuration file, it will be represented in the Hash as an empty String.
# If there is an error, an unsuccessful Response will be returned.
def config_data
return Response.new :code => 1, :message => 'VM does not exist' unless @vm.exists?
conf_file_response = @vm.conf_file
return conf_file_response unless conf_file_response.successful?
@conf_file_location = conf_file_response.data
Response.new :code => 0, :data => parse_vm_config_file
end
private
# Internal: Parses the configuration file (i.e. '.vmx')
#
# Examples:
#
# @vm_config.parse_vm_config_file
# # => { 'memsize' => '384', 'ethernet0.present' => 'TRUE',... }
#
# Returns a Hash.
# All keys and values are represented as a String (even when the value in
# the conf file is 'TRUE'). If a value is an empty string in the
# configuration file, it will be represented in the Hash as an empty String.
def parse_vm_config_file
File.readlines(@conf_file_location).inject({}) do |result, line|
data = parse_line_data(line)
result[data[0]] = (data[1].nil? ? '' : data[1])
result
end
end
# Internal: Splits and formats a single line from a VM configuration file
# into an Array.
#
# Examples:
#
# @vm_config.parse_line_data('foo = "bar"')
#
# Returns an Array. The first item will be the left side of the '=' and the
# second item will be the right side. This will also strip any whitespace
# characters from the beginning or end of the provided line.
def parse_line_data(line)
line.strip.gsub('"', '').split ' = '
end
end
end
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