Class: Migrant::Environment

Inherits:
Object
  • Object
show all
Defined in:
lib/migrant/environment.rb

Overview

Holds all the state for this run of Migrant

Constant Summary collapse

DEFAULT_DATA_PATH = 
'data'
DEFAULT_BOXES_PATH = 
File.join(DEFAULT_DATA_PATH,'migrant_boxes.yml')

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(environment_name, config = nil) ⇒ Environment

Returns a new instance of Environment.



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# File 'lib/migrant/environment.rb', line 11

def initialize(environment_name,config=nil)
  @ui = Migrant::UI.new(::Thor::Base.shell.new)
  @environment_name = environment_name
  if config
    @config = config
  else
    Kernel.load 'Migrantfile'
    @config = Configuration.for('migrant')
  end
  if @environment_name.nil?
    @ui.notice "Using default environment"
  elsif @config.include?(@environment_name.to_sym)
    @ui.notice "Using #{@environment_name} environment"
  else
    @ui.error "#{@environment_name} environment is not defined in the configuration file"
    raise "Environment #{@environment_name} not found"
  end

  cloud_class = Migrant::Clouds::Base.registered(setting('provider.name'))
  raise "Cannot find cloud '#{setting('provider.name')}'" if cloud_class.nil?
  @cloud = cloud_class.new(self)
  @bootstrapper = Migrant::Bootstrappers::Base.default.new(self)
  @provisioner = Migrant::Provisioners::Base.registered(:chef_solo).new(self)
  FileUtils.mkdir_p DEFAULT_DATA_PATH unless File.exists?(DEFAULT_DATA_PATH)
  @boxes = Boxes.new(DEFAULT_BOXES_PATH).load
end

Instance Attribute Details

#cloud ⇒ Object (readonly)

Returns the value of attribute cloud.



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# File 'lib/migrant/environment.rb', line 126

def cloud
  @cloud
end

#server ⇒ Object

Returns the value of attribute server.



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# File 'lib/migrant/environment.rb', line 124

def server
  @server
end

#ui ⇒ Object (readonly)

Returns the value of attribute ui.



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# File 'lib/migrant/environment.rb', line 125

def ui
  @ui
end

Instance Method Details

#bootstrap ⇒ Object 



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# File 'lib/migrant/environment.rb', line 101

def bootstrap
  @bootstrapper.run unless @bootstrapper.bootstrapped?
end

#connect ⇒ Object 



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# File 'lib/migrant/environment.rb', line 66

def connect
  ui.warn "Connecting to #{setting('provider.name')}"
  @cloud.connect
end

#destroy ⇒ Object 



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# File 'lib/migrant/environment.rb', line 111

def destroy
  box = @boxes[@environment_name]

  if box.nil?
    @ui.error "There are currently no boxes running"
  else
    if @cloud.destroy(box)
      @boxes.remove @environment_name
      @boxes.save
    end
  end
end

#info ⇒ Object 



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# File 'lib/migrant/environment.rb', line 90

def info
  box = @boxes[@environment_name]
  if box.nil?
    @ui.info "There are no boxes running"
  else
    connect
    @cloud.connect_to_server(box)
    @cloud.log_server_info
  end
end

#init_server ⇒ Object

If the server exists, connect to it. If not, bootstrap it



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# File 'lib/migrant/environment.rb', line 81

def init_server
  box = @boxes[@environment_name]
  if box.nil?
    launch!
  else
    @cloud.connect_to_server(box)
  end
end

#launch! ⇒ Object 



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# File 'lib/migrant/environment.rb', line 71

def launch!
  @cloud.bootstrap_server
  @boxes.add(@environment_name,setting('provider.name'),@server.id)
  @boxes.save

  # persist metadata about server so we can load it later
  @cloud.execute ['pwd']
end

#provision ⇒ Object 



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# File 'lib/migrant/environment.rb', line 105

def provision
  @provisioner.upload
  @provisioner.prepare
  @provisioner.run
end

#setting(name) ⇒ Object

Retrieve a setting by name. First try within the context of the current environment. If the property does not exist there, look in the default property definitions



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# File 'lib/migrant/environment.rb', line 40

def setting(name)
  roots = []
  if @environment_name
    roots << @config.send(@environment_name)
  end
  roots << @config
  roots.each do |root|
    begin
      setting_value = name.split('.').inject(root) { |node,prop| if node.include?(prop.to_sym) then node.send(prop) else raise "Undefined property #{prop} for #{node.name}" end}
      return setting_value
    rescue => e
      # Fall through to next case
    end
  end
  # If we get here the property does not exist
  #XXX - should probably ask for a default, and if one is not provided, raise an error
  nil
end

#up ⇒ Object 



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# File 'lib/migrant/environment.rb', line 59

def up
  connect
  init_server
  bootstrap
  provision
end