Class: Webpacker::Digests

Inherits:
Object
  • Object
show all
Defined in:
lib/webpacker/digests.rb

Overview

Singleton registry for accessing the digested filenames computed by Webpack in production mode. This allows javascript_pack_tag to take a reference to, say, “calendar.js” and turn it into “calendar-1016838bab065ae1e314.js”. These digested filenames are what enables you to long-term cache things in production.

Defined Under Namespace

Classes: DigestError

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(path) ⇒ Digests

Returns a new instance of Digests.



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# File 'lib/webpacker/digests.rb', line 24

def initialize(path)
  @path    = path
  @digests = load
end

Class Method Details

.load(path) ⇒ Object 



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# File 'lib/webpacker/digests.rb', line 11

def load(path)
  self.instance = new(path)
end

.lookup(name) ⇒ Object 



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# File 'lib/webpacker/digests.rb', line 15

def lookup(name)
  if instance
    instance.lookup(name).presence || raise(DigestError.new("Can't find #{name} in #{instance.inspect}"))
  else
    raise DigestError.new("Webpacker::Digests.load(path) must be called first")
  end
end

Instance Method Details

#lookup(name) ⇒ Object 



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# File 'lib/webpacker/digests.rb', line 29

def lookup(name)
  @digests[name.to_s]
end