Remove reliance on ERBTracker from rails

lib/jbuilder/jbuilder_dependency_tracker.rb

@@ -0,0 +1,73 @@
+class Jbuilder::DependencyTracker
+  EXPLICIT_DEPENDENCY = /# Template Dependency: (\S+)/
+
+  # Matches:
+  #   json.partial! "messages/message"
+  #   json.partial!('messages/message')
+  #
+  DIRECT_RENDERS = /
+        \w+\.partial!     # json.partial!
+        \(?\s*            # optional parenthesis
+        (['"])([^'"]+)\1  # quoted value
+      /x
+
+  # Matches:
+  #   json.partial! partial: "comments/comment"
+  #   json.comments @post.comments, partial: "comments/comment", as: :comment
+  #   json.array! @posts, partial: "posts/post", as: :post
+  #   = render partial: "account"
+  #
+  INDIRECT_RENDERS = /
+        (?::partial\s*=>|partial:)  # partial: or :partial =>
+        \s*                         # optional whitespace
+        (['"])([^'"]+)\1            # quoted value
+      /x
+
+  def self.call(name, template, view_paths = nil)
+    new(name, template, view_paths).dependencies
+  end
+
+  def initialize(name, template, view_paths = nil)
+    @name, @template, @view_paths = name, template, view_paths
+  end
+
+  def dependencies
+    direct_dependencies + indirect_dependencies + explicit_dependencies
+  end
+
+  private
+
+  attr_reader :name, :template
+
+  def direct_dependencies
+    source.scan(DIRECT_RENDERS).map(&:second)
+  end
+
+  def indirect_dependencies
+    source.scan(INDIRECT_RENDERS).map(&:second)
+  end
+
+  def explicit_dependencies
+    dependencies = source.scan(EXPLICIT_DEPENDENCY).flatten.uniq
+
+    wildcards, explicits = dependencies.partition { |dependency| dependency.end_with?("/*") }
+
+    (explicits + resolve_directories(wildcards)).uniq
+  end
+
+  def resolve_directories(wildcard_dependencies)
+    return [] unless @view_paths
+    return [] if wildcard_dependencies.empty?
+
+    # Remove trailing "/*"
+    prefixes = wildcard_dependencies.map { |query| query[0..-3] }
+
+    @view_paths.flat_map(&:all_template_paths).uniq.filter_map { |path|
+      path.to_s if prefixes.include?(path.prefix)
+    }.sort
+  end
+
+  def source
+    template.source
+  end
+end

test/jbuilder_dependency_tracker_test.rb

@@ -1,6 +1,5 @@
 require 'test_helper'
-require 'jbuilder/dependency_tracker'
-
+require 'jbuilder/jbuilder_dependency_tracker'
 
 class FakeTemplate
     attr_reader :source, :handler