Class: Cartage::Rack::Metadata

Inherits:
Object
  • Object
show all
Defined in:
lib/cartage/rack/metadata.rb

Overview

A representation for Cartage metadata for use with Cartage::Rack and Cartage::Rack::Simple.

Instance Method Summary collapse

Constructor Details

#initialize(root_path = nil, required: Cartage::Rack.require_metadata, filter: nil) ⇒ Metadata

Parse static release metadata from the root_path (or Dir.pwd) and prepare the Metadata object for resolution.

If filter is provided, it should be a callable (a lambda or proc) that will manipulate the content on resolution.

If required is true (defaults to the value of Cartage::Rack.require_metadata, which is true for everything except development and test), then a RuntimeError will be thrown if there is no static release metadata.

If required is false, then the release metadata can be loaded from the active environment.



29
30
31
32
33
34
35
36
37
 
# File 'lib/cartage/rack/metadata.rb', line 29

def initialize(root_path = nil, required: Cartage::Rack.require_metadata, filter: nil)
  @root_path = Pathname(root_path || Dir.pwd)
  @filter = filter
  @content = read_release_metadata_json || read_release_hashref

  fail 'Cannot find release-metadata.json or release_hashref' if required && !@content

  @source ||= :live
end

Instance Method Details

#inspect ⇒ Object

:nodoc:



48
49
50
 
# File 'lib/cartage/rack/metadata.rb', line 48

def inspect #:nodoc:
  "#{@root_path.expand_path.basename} (#{@source})"
end

#resolve ⇒ Object

Resolve the metadata content with the application environment. If a filter was provided on object construction, apply it do the merged content data.



42
43
44
45
46
 
# File 'lib/cartage/rack/metadata.rb', line 42

def resolve
  content.merge(application_env).tap do |data|
    @filter.call(data) if @filter
  end.delete_if(&METADATA_CLEANER)
end