diff options
Diffstat (limited to 'actionview/lib/action_view/dependency_tracker.rb')
| -rw-r--r-- | actionview/lib/action_view/dependency_tracker.rb | 92 |
1 files changed, 67 insertions, 25 deletions
diff --git a/actionview/lib/action_view/dependency_tracker.rb b/actionview/lib/action_view/dependency_tracker.rb index b2e8334077..0ccf2515c5 100644 --- a/actionview/lib/action_view/dependency_tracker.rb +++ b/actionview/lib/action_view/dependency_tracker.rb @@ -1,7 +1,7 @@ require 'thread_safe' module ActionView - class DependencyTracker + class DependencyTracker # :nodoc: @trackers = ThreadSafe::Cache.new def self.find_dependencies(name, template) @@ -23,24 +23,52 @@ module ActionView @trackers.delete(handler) end - class ERBTracker + class ERBTracker # :nodoc: EXPLICIT_DEPENDENCY = /# Template Dependency: (\S+)/ + # A valid ruby identifier - suitable for class, method and specially variable names + IDENTIFIER = / + [[:alpha:]_] # at least one uppercase letter, lowercase letter or underscore + [[:word:]]* # followed by optional letters, numbers or underscores + /x + + # Any kind of variable name. e.g. @instance, @@class, $global or local. + # Possibly following a method call chain + VARIABLE_OR_METHOD_CHAIN = / + (?:\$|@{1,2})? # optional global, instance or class variable indicator + (?:#{IDENTIFIER}\.)* # followed by an optional chain of zero-argument method calls + (?<dynamic>#{IDENTIFIER}) # and a final valid identifier, captured as DYNAMIC + /x + + # A simple string literal. e.g. "School's out!" + STRING = / + (?<quote>['"]) # an opening quote + (?<static>.*?) # with anything inside, captured as STATIC + \k<quote> # and a matching closing quote + /x + + # Part of any hash containing the :partial key + PARTIAL_HASH_KEY = / + (?:\bpartial:|:partial\s*=>) # partial key in either old or new style hash syntax + \s* # followed by optional spaces + /x + # Matches: - # render partial: "comments/comment", collection: commentable.comments - # render "comments/comments" - # render 'comments/comments' - # render('comments/comments') + # partial: "comments/comment", collection: @all_comments => "comments/comment" + # (object: @single_comment, partial: "comments/comment") => "comments/comment" # - # render(@topic) => render("topics/topic") - # render(topics) => render("topics/topic") - # render(message.topics) => render("topics/topic") - RENDER_DEPENDENCY = / - render\s* # render, followed by optional whitespace - \(? # start an optional parenthesis for the render call - (partial:|:partial\s+=>)?\s* # naming the partial, used with collection -- 1st capture - ([@a-z"'][@\w\/\."']+) # the template name itself -- 2nd capture - /x + # "comments/comments" + # 'comments/comments' + # ('comments/comments') + # + # (@topic) => "topics/topic" + # topics => "topics/topic" + # (message.topics) => "topics/topic" + RENDER_ARGUMENTS = /\A + (?:\s*\(?\s*) # optional opening paren surrounded by spaces + (?:.*?#{PARTIAL_HASH_KEY})? # optional hash, up to the partial key declaration + (?:#{STRING}|#{VARIABLE_OR_METHOD_CHAIN}) # finally, the dependency name of interest + /xm def self.call(name, template) new(name, template).dependencies @@ -68,19 +96,33 @@ module ActionView end def render_dependencies - source.scan(RENDER_DEPENDENCY). - collect(&:second).uniq. + render_dependencies = [] + render_calls = source.split(/\brender\b/).drop(1) - # render(@topic) => render("topics/topic") - # render(topics) => render("topics/topic") - # render(message.topics) => render("topics/topic") - collect { |name| name.sub(/\A@?([a-z_]+\.)*([a-z_]+)\z/) { "#{$2.pluralize}/#{$2.singularize}" } }. + render_calls.each do |arguments| + arguments.scan(RENDER_ARGUMENTS) do + add_dynamic_dependency(render_dependencies, Regexp.last_match[:dynamic]) + add_static_dependency(render_dependencies, Regexp.last_match[:static]) + end + end - # render("headline") => render("message/headline") - collect { |name| name.include?("/") ? name : "#{directory}/#{name}" }. + render_dependencies.uniq + end + + def add_dynamic_dependency(dependencies, dependency) + if dependency + dependencies << "#{dependency.pluralize}/#{dependency.singularize}" + end + end - # replace quotes from string renders - collect { |name| name.gsub(/["']/, "") } + def add_static_dependency(dependencies, dependency) + if dependency + if dependency.include?('/') + dependencies << dependency + else + dependencies << "#{directory}/#{dependency}" + end + end end def explicit_dependencies |