Class: Veewee::Definitions

Inherits:
Object
  • Object
show all
Defined in:
lib/veewee/definitions.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(env) ⇒ Definitions

Returns a new instance of Definitions.



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# File 'lib/veewee/definitions.rb', line 11

def initialize(env)
  @env = env
  return self
end

Instance Attribute Details

#env ⇒ Object

Returns the value of attribute env.



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# File 'lib/veewee/definitions.rb', line 9

def env
  @env
end

Instance Method Details

#[](name) ⇒ Object 



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# File 'lib/veewee/definitions.rb', line 16

def [](name)
  begin
    definition = Veewee::Definition.load(name, env)
    return definition
  rescue Veewee::DefinitionNotExist
    return nil
  end
end

#create_definition_dir_if_needed ⇒ Object 



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# File 'lib/veewee/definitions.rb', line 148

def create_definition_dir_if_needed
  # Check if definition_dir already exists
  unless File.exists?(env.definition_dir)
    env.logger.debug("Creating definition base directory '#{env.definition_dir}' ")
    FileUtils.mkdir(env.definition_dir)
    env.logger.debug("Definition base directory '#{env.definition_dir}' succesfuly created")
  end

  if File.writable?(env.definition_dir)
    env.logger.debug("DefinitionDir '#{env.definition_dir}' is writable")
    if File.exists?("#{env.definition_dir}")
      env.logger.debug("DefinitionDir '#{env.definition_dir}' already exists")
    else
      env.logger.debug("DefinitionDir '#{env.definition_dir}' does not exist, creating it")
      FileUtils.mkdir(definition_dir)
      env.logger.debug("DefinitionDir '#{env.definition_dir}' succesfuly created")
    end
  else
    env.logger.fatal("DefinitionDir '#{definition_dir}' is not writable")
    raise Veewee::Error, "DefinitionDir '#{definition_dir}' is not writable"
  end
end

#define(definition_name, template_name, options = {}) ⇒ Object

This function ‘defines’/‘clones’/‘instantiates a template: It copies from a template dir with template_name

to a new definition dir with definition_name

Options are : :force => true to overwrite an existing definition

Returns definition object



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# File 'lib/veewee/definitions.rb', line 56

def define(definition_name, template_name, options = {})

  # Default is not to overwrite
  options = { 'force' => false }.merge(options)

  env.logger.debug("Forceflag : #{options['force']}")

  git_template = false
  # Check if the template is a git repo
  if template_name.start_with?("git://")
    git_template = true
  end

  # Check if template exists
  template = env.templates[template_name]
  if template.nil? and ! git_template
    env.logger.fatal("Template '#{template_name}' does not exist")
    raise Veewee::TemplateError, "Template '#{template_name}' does not exist"
  else
    env.logger.debug("Template '#{template_name}' exists")
  end

  create_definition_dir_if_needed

  # Check if definition does not exist
  definition = env.definitions[definition_name]
  unless definition.nil?
    env.logger.debug("Definition '#{definition_name}' exists")
    if options['force'] == true
      self.undefine(definition_name, options)
    else
      raise Veewee::DefinitionError, "Definition #{definition_name} already exists and no force option was given"
    end
  end

  env.logger.info("Creating definition #{definition_name} in directory '#{env.definition_dir}' ")
  dst_dir = "#{File.join(env.definition_dir, definition_name)}"
  FileUtils.mkdir(dst_dir)
  env.logger.debug("Definition Directory '#{File.join(env.definition_dir, definition_name)}' succesfuly created")

  # Start copying/cloning the directory of the template to the definition directory
  if (git_template)
    begin
      env.logger.info("Starting git clone #{template_name} #{dst_dir}")
      g = Grit::Git.new(dst_dir)
      g.clone({ :timeout => false }, template_name, dst_dir)
    rescue Exception => ex
      err = "git clone #{template_name} #{dst_dir} failed: #{ex}"
      env.logger.fatal(err)
      raise Veewee::DefinitionError, err
    end
  else
    begin
      env.logger.debug("Starting copy '#{template.path}' to '#{dst_dir}'")
      FileUtils.cp_r(template.path + "/.", dst_dir)
      env.logger.debug("Copy '#{template.path}' to '#{dst_dir}' succesful")
    rescue Exception => ex
      env.logger.fatal("Copy '#{template.path}' to #{dst_dir}' failed: #{ex}")
      raise Veewee::Error, "Copy '#{template.path}' to #{dst_dir}' failed: #{ex}"
    end
  end

  definition = env.definitions[definition_name]
  return definition
end

#each(&block) ⇒ Object

Fetch all definitions



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# File 'lib/veewee/definitions.rb', line 26

def each(&block)
  definitions = Hash.new

  env.logger.debug("[Definition] Searching #{env.definition_dir} for definitions:")
  subdirs = Dir.glob("#{env.definition_dir}/*")

  subdirs.each do |sub|
    name = File.basename(sub)
    env.logger.debug("[Definition] possible definition '#{name}' found")
    begin
      definitions[name] = Veewee::Definition.load(name, env)
    rescue Veewee::DefinitionError => ex
      env.logger.debug("[Definition] failed to load definition from directory '#{name}' #{ex}")
    end
  end

  if definitions.length == 0
    env.logger.debug("[Definition] no definitions found")
  end

  definitions.each(&block)
end

#undefine(definition_name, options = {}) ⇒ Object

This function undefines/removes the definition by removing the directoy with definition_name under env.definition_dir



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# File 'lib/veewee/definitions.rb', line 125

def undefine(definition_name, options = {})
  definition = env.definitions[definition_name]
  unless definition.nil?

    #TODO: Needs to be more defensive!!
    env.logger.debug("[Undefine] About to remove '#{definition.path} for '#{definition_name}'")
    begin
      if File.exists?(File.join(definition.path, "definition.rb"))
        FileUtils.rm_rf(definition.path)
      else
        env.logger.fatal("Aborting delete: The directory definition.path does not contain a definition.rb file")
        raise Veewee::DefinitionError, "Aborting delete: The directory definition.path does not contain a definition.rb file"
      end
    rescue Exception => ex
      env.logger.fatal("Removing '#{definition.path} for '#{definition_name}' failed: #{ex}")
      raise Veewee::Error, "Removing '#{definition.path }for '#{definition_name}' failed: #{ex}"
    end
    env.logger.debug("Removing '#{definition.path} for '#{definition_name}' succesful")
  else
    raise Veewee::DefinitionError, "Definition '#{definition_name}' does not exist"
  end
end