Add example script

Signed-off-by: Alexandre Terrasa <[email protected]>

script.rb

@@ -0,0 +1,68 @@
+# typed: true
+# frozen_string_literal: true
+
+require "spoom"
+
+# Collect all the files
+warn "Collecting files..."
+files = ARGV.flat_map do |path|
+  if File.directory?(path)
+    Dir.glob(File.join(path, "**/*.rb")).sort
+  else
+    path
+  end
+end
+warn "  Collected #{files.size} files"
+
+# Build the model
+warn "Building the model..."
+model = Spoom::Model.new
+
+files.each do |file|
+  content = File.read(file)
+  node = Spoom.parse_ruby(content, file: file)
+  builder = Spoom::Model::Builder.new(model, file)
+  builder.visit(node)
+rescue Spoom::ParseError
+  # no-op
+end
+warn "  Found #{model.symbols.size} symbols"
+
+# Collect all the references
+warn "Collecting references..."
+refs = T.let({}, T::Hash[String, T::Array[Spoom::Model::Reference]])
+files.each do |file|
+  content = File.read(file)
+  node = Spoom.parse_ruby(content, file: file)
+  visitor = Spoom::Model::ReferencesVisitor.new(file)
+  visitor.visit(node)
+
+  visitor.references.each do |ref|
+    (refs[ref.name] ||= []) << ref
+  end
+rescue Spoom::ParseError
+  # no-op
+end
+warn "  Found #{refs.size} references"
+
+# Collect all subclasses of `ApplicationController`
+warn "Collecting subclasses of ApplicationController..."
+model.finalize!
+symbol = model["ApplicationController"]
+subclasses = model.subtypes(symbol)
+warn "  Found #{subclasses.size} subclasses"
+warn "\n\n"
+
+puts "Subclasses of ApplicationController:"
+subclasses.each do |subclass|
+  puts "  #{subclass.name}"
+  subclass.definitions.each do |defn|
+    next unless defn.is_a?(Spoom::Model::Class)
+
+    defn.children.each do |child|
+      next unless child.is_a?(Spoom::Model::Method)
+
+      puts "    #{child.name} - #{child.location} (#{refs[child.name]&.size || 0} refs)"
+    end
+  end
+end