Class: Cloudspin::Stack::Instance

Inherits:
Object
  • Object
show all
Includes:
FileUtils
Defined in:
lib/cloudspin/stack/instance.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(id:, stack_definition:, base_working_folder:, configuration:) ⇒ Instance

Returns a new instance of Instance.



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# File 'lib/cloudspin/stack/instance.rb', line 14

def initialize(
      id:,
      stack_definition:,
      base_working_folder:,
      configuration:
)
  validate_id(id)
  @id = id
  @stack_definition = stack_definition
  @working_folder   = "#{base_working_folder}/#{id}"
  @configuration    = configuration
  @backend_configuration = configuration.backend_configuration
  # puts "DEBUG: instance working_folder: #{@working_folder}"
end

Instance Attribute Details

#backend_configuration ⇒ Object (readonly)

Returns the value of attribute backend_configuration.



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# File 'lib/cloudspin/stack/instance.rb', line 9

def backend_configuration
  @backend_configuration
end

#configuration ⇒ Object (readonly)

Returns the value of attribute configuration.



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# File 'lib/cloudspin/stack/instance.rb', line 9

def configuration
  @configuration
end

#id ⇒ Object (readonly)

Returns the value of attribute id.



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# File 'lib/cloudspin/stack/instance.rb', line 9

def id
  @id
end

#working_folder ⇒ Object (readonly)

Returns the value of attribute working_folder.



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# File 'lib/cloudspin/stack/instance.rb', line 9

def working_folder
  @working_folder
end

Class Method Details

.from_files(*instance_configuration_files, stack_definition:, base_folder: '.', base_working_folder:) ⇒ Object 



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# File 'lib/cloudspin/stack/instance.rb', line 47

def self.from_files(
      *instance_configuration_files,
      stack_definition:,
      base_folder: '.',
      base_working_folder:
)
  instance_configuration = InstanceConfiguration.from_files(
    instance_configuration_files,
    stack_definition: stack_definition,
    base_folder: base_folder
  )

  self.new(
      id: instance_configuration.instance_identifier,
      stack_definition: stack_definition,
      base_working_folder: base_working_folder,
      configuration: instance_configuration
    )
end

.from_folder(*instance_configuration_files, definition_location:, base_folder: '.', base_working_folder:) ⇒ Object 



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# File 'lib/cloudspin/stack/instance.rb', line 29

def self.from_folder(
      *instance_configuration_files,
      definition_location:,
      base_folder: '.',
      base_working_folder:
)
  self.from_files(
      instance_configuration_files,
      stack_definition: Definition.from_location(
          definition_location,
          definition_cache_folder: "#{base_folder}/.cloudspin/definitions",
          stack_configuration: InstanceConfiguration.load_configuration_values(instance_configuration_files)['stack']
      ),
      base_folder: base_folder,
      base_working_folder: base_working_folder
    )
end

Instance Method Details

#after ⇒ Object 



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# File 'lib/cloudspin/stack/instance.rb', line 76

def after
  @backend_configuration.after(working_folder: working_folder)
end

#clean_working_folder ⇒ Object 



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# File 'lib/cloudspin/stack/instance.rb', line 80

def clean_working_folder
  FileUtils.rm_rf(working_folder)
end

#copy_instance_source ⇒ Object 



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# File 'lib/cloudspin/stack/instance.rb', line 88

def copy_instance_source
  cp_r @stack_definition.source_path, working_folder
end

#create_variables_file ⇒ Object 



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# File 'lib/cloudspin/stack/instance.rb', line 101

def create_variables_file
  # puts "DEBUG: Creating file #{working_folder}/_cloudspin-#{id}.auto.tfvars"
  File.open("#{working_folder}/_cloudspin-#{id}.auto.tfvars", 'w') { |tfvars_file|
    tfvars_file.write("# Automatically generated by cloudspin\n")
    tfvars_file.write(terraform_variables.map { |name,value| "#{name} = #{format_tfvar(value)}" }.join("\n"))
    tfvars_file.write("\n")
  }
end

#create_working_folder ⇒ Object 



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# File 'lib/cloudspin/stack/instance.rb', line 84

def create_working_folder
  mkdir_p File.dirname(working_folder)
end

#ensure_folder(folder) ⇒ Object 



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# File 'lib/cloudspin/stack/instance.rb', line 92

def ensure_folder(folder)
  mkdir_p folder
  Pathname.new(folder).realdirpath.to_s
end

#format_tfvar(raw_value) ⇒ Object 



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# File 'lib/cloudspin/stack/instance.rb', line 110

def format_tfvar(raw_value)
  if [true,false].include? raw_value
    "#{raw_value}"
  elsif raw_value.is_a?(Array)
    '[' +
    raw_value.map { |raw_item|
      format_tfvar(raw_item)
    }.join(', ') +
    ']'
  elsif raw_value.is_a?(Hash)
    '{ ' +
    raw_value.map { |key,val|
      "\"#{key}\": #{format_tfvar(val)}"
    }.join(', ') +
    ' }'
  else
    "\"#{raw_value}\""
  end
end

#parameter_values ⇒ Object 



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# File 'lib/cloudspin/stack/instance.rb', line 136

def parameter_values
  configuration.parameter_values
end

#prepare ⇒ Object 



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# File 'lib/cloudspin/stack/instance.rb', line 67

def prepare
  clean_working_folder
  create_working_folder
  copy_instance_source
  prepare_state
  create_variables_file
  @working_folder
end

#prepare_state ⇒ Object 



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# File 'lib/cloudspin/stack/instance.rb', line 97

def prepare_state
  @backend_configuration.prepare(working_folder: working_folder)
end

#resource_values ⇒ Object 



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# File 'lib/cloudspin/stack/instance.rb', line 140

def resource_values
  configuration.resource_values
end

#terraform_command_arguments ⇒ Object 



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# File 'lib/cloudspin/stack/instance.rb', line 154

def terraform_command_arguments
  @backend_configuration.terraform_command_arguments
end

#terraform_init_arguments ⇒ Object 



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# File 'lib/cloudspin/stack/instance.rb', line 150

def terraform_init_arguments
  @backend_configuration.terraform_init_arguments
end

#terraform_variables ⇒ Object 



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# File 'lib/cloudspin/stack/instance.rb', line 144

def terraform_variables
  parameter_values.merge(resource_values) { |key, oldval, newval|
    raise "Duplicate values for terraform variable '#{key}' ('#{oldval}' and '#{newval}')"
  }.merge({ 'instance_identifier' => id })
end

#validate_id(raw_id) ⇒ Object 



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# File 'lib/cloudspin/stack/instance.rb', line 130

def validate_id(raw_id)
  raise "Stack instance ID '#{raw_id}' won't work. It needs to work as a filename." if /[^0-9A-Za-z.\-\_]/ =~ raw_id
  raise "Stack instance ID '#{raw_id}' won't work. No double dots allowed." if /\.\./ =~ raw_id
  raise "Stack instance ID '#{raw_id}' won't work. First character should be a letter." if /^[^A-Za-z]/ =~ raw_id
end