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104 lines
No EOL
3.3 KiB
Ruby
104 lines
No EOL
3.3 KiB
Ruby
require 'active_support/core_ext'
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require 'logger'
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module ActionView
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class Digestor
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EXPLICIT_DEPENDENCY = /# Template Dependency: ([^ ]+)/
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# Matches:
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# render partial: "comments/comment", collection: commentable.comments
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# render "comments/comments"
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# render 'comments/comments'
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# render('comments/comments')
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#
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# render(@topic) => render("topics/topic")
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# render(topics) => render("topics/topic")
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# render(message.topics) => render("topics/topic")
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RENDER_DEPENDENCY = /
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render\s* # render, followed by an optional space
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\(? # start a optional parenthesis for the render call
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(partial:|:partial\s+=>)?\s* # naming the partial, used with collection -- 1st capture
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([@a-z"'][@a-z_\/\."']+) # the template name itself -- 2nd capture
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/x
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cattr_accessor(:cache) { Hash.new }
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cattr_accessor(:logger, instance_reader: true) { ActionView::Base.logger }
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def self.digest(name, format, finder, options = {})
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cache["#{name}.#{format}"] ||= new(name, format, finder, options).digest
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end
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attr_reader :name, :format, :finder, :options
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def initialize(name, format, finder, options = {})
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@name, @format, @finder, @options = name, format, finder, options
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end
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def digest
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Digest::MD5.hexdigest("#{name}.#{format}-#{source}-#{dependency_digest}").tap do |digest|
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logger.try :info, "Cache digest for #{name}.#{format}: #{digest}"
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end
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rescue ActionView::MissingTemplate
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logger.try :error, "Couldn't find template for digesting: #{name}.#{format}"
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''
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end
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def dependencies
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render_dependencies + explicit_dependencies
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rescue ActionView::MissingTemplate
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[] # File doesn't exist, so no dependencies
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end
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def nested_dependencies
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dependencies.collect do |dependency|
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dependencies = Digestor.new(dependency, format, finder, partial: true).nested_dependencies
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dependencies.any? ? { dependency => dependencies } : dependency
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end
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end
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private
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def logical_name
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name.gsub(%r|/_|, "/")
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end
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def directory
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name.split("/").first
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end
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def partial?
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options[:partial] || name.include?("/_")
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end
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def source
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@source ||= finder.find(logical_name, [], partial?, formats: [ format ]).source
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end
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def dependency_digest
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dependencies.collect do |template_name|
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Digestor.digest(template_name, format, finder, partial: true)
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end.join("-")
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end
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def render_dependencies
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source.scan(RENDER_DEPENDENCY).
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collect(&:second).uniq.
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# render(@topic) => render("topics/topic")
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# render(topics) => render("topics/topic")
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# render(message.topics) => render("topics/topic")
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collect { |name| name.sub(/\A@?([a-z]+\.)*([a-z_]+)\z/) { "#{$2.pluralize}/#{$2.singularize}" } }.
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# render("headline") => render("message/headline")
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collect { |name| name.include?("/") ? name : "#{directory}/#{name}" }.
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# replace quotes from string renders
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collect { |name| name.gsub(/["']/, "") }
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end
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def explicit_dependencies
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source.scan(EXPLICIT_DEPENDENCY).flatten.uniq
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end
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end
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end |