From cc0c251a683ec86b3aac1c813ff293684526b404 Mon Sep 17 00:00:00 2001
From: Joe Anderson <4272090+12joan@users.noreply.github.com>
Date: Sun, 7 Jun 2026 17:56:48 +0100
Subject: [PATCH] Find files using a specific method on a given class

---
 usage_data.rb |  2 +-
 used_by.rb    | 28 ++++++++++++++++++++++------
 2 files changed, 23 insertions(+), 7 deletions(-)

diff --git a/usage_data.rb b/usage_data.rb
index e916b233..10f8256f 100644
--- a/usage_data.rb
+++ b/usage_data.rb
@@ -3,7 +3,7 @@
 module UsageData
   DO_NOT_SEARCH_DIRS = %w[vendor Plugins]
   GUID_REFERENCING_EXTENSIONS = %w[.unity .prefab .mat .asset .controller]
-  IDENTIFIER_REFERENCING_EXTENSIONS = %w[.cs]
+  IDENTIFIER_REFERENCING_EXTENSIONS = %w[.cs .unity .prefab]
   IGNORE_UNUSED_EXTENSIONS = %w[.unity .preset .otf .ttf .asset .txt .asmdef]
   IGNORE_UNUSED_DIRS = %w[Assets/test/]
 
diff --git a/used_by.rb b/used_by.rb
index 49d8ca8a..a9c474e9 100644
--- a/used_by.rb
+++ b/used_by.rb
@@ -1,17 +1,33 @@
 require_relative 'usage_data'
 
-input_path = ARGV[0] || raise('Usage: ruby used_by.rb <path>')
-raise "error: #{input_path} does not exist" unless File.exist?(input_path)
-basename = File.basename(input_path)
+path = ARGV[0] || raise('Usage: ruby used_by.rb <path> [method]')
+method_name = ARGV[1]
+raise "error: #{path} does not exist" unless File.exist?(path)
+basename = File.basename(path)
 
 UsageData.register_source_files
 
 file = UsageData::SourceFile.all.find { |f| f.basename == basename }
-raise "error: #{input_path} is not a registered source file" unless file
+raise "error: #{path} is not a registered source file" unless file
 
 used_by = file.used_by
-puts "Found #{used_by.count} files using #{basename}:"
 
-used_by.each do |file|
+filtered_used_by =
+  if method_name
+    used_by.filter { |f| f.referenced_identifiers.include? method_name }
+  else
+    used_by
+  end
+
+qualifier =
+  if method_name
+    "the #{method_name} method of "
+  else
+    ''
+  end
+
+puts "Found #{filtered_used_by.count} file(s) using #{qualifier + basename}:"
+
+filtered_used_by.each do |file|
   puts "  #{file.basename}"
 end