From ce60048192d7f2a5b04cd44d4ca28325a5c1e390 Mon Sep 17 00:00:00 2001
From: Markus Reiter <me@reitermark.us>
Date: Wed, 14 Feb 2024 20:27:53 +0100
Subject: [PATCH] Handle `TapFormulaAmbiguityError` in diagnostics.

---
 Library/Homebrew/diagnostic.rb | 8 +++++++-
 Library/Homebrew/exceptions.rb | 7 ++++---
 Library/Homebrew/formulary.rb  | 2 +-
 3 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/Library/Homebrew/diagnostic.rb b/Library/Homebrew/diagnostic.rb
index b869809a0612e..87d58992598f5 100644
--- a/Library/Homebrew/diagnostic.rb
+++ b/Library/Homebrew/diagnostic.rb
@@ -841,7 +841,13 @@ def check_deleted_formula
             Formulary::FromAPILoader,
             Formulary::FromNameLoader,
           ].any? do |loader_class|
-            if (loader = loader_class.try_new(keg.name, warn: false))
+            loader = begin
+              loader_class.try_new(keg.name, warn: false)
+            rescue TapFormulaAmbiguityError => e
+              e.loaders.first
+            end
+
+            if loader
               # If we know the tap, ignore all other taps.
               next false if tap && loader.tap != tap
 
diff --git a/Library/Homebrew/exceptions.rb b/Library/Homebrew/exceptions.rb
index e402a3b8280a6..3fdda640b25c1 100644
--- a/Library/Homebrew/exceptions.rb
+++ b/Library/Homebrew/exceptions.rb
@@ -259,11 +259,12 @@ def initialize(tap, name, error)
 
 # Raised when a formula with the same name is found in multiple taps.
 class TapFormulaAmbiguityError < RuntimeError
-  attr_reader :name, :taps
+  attr_reader :name, :taps, :loaders
 
-  def initialize(name, taps)
+  def initialize(name, loaders)
     @name = name
-    @taps = taps
+    @loaders = loaders
+    @taps = loaders.map(&:tap)
 
     formulae = taps.map { |tap| "#{tap}/#{name}" }
     formula_list = formulae.map { |f| "\n       * #{f}" }.join
diff --git a/Library/Homebrew/formulary.rb b/Library/Homebrew/formulary.rb
index 87a399b4e6e56..4e7f151c8b3a8 100644
--- a/Library/Homebrew/formulary.rb
+++ b/Library/Homebrew/formulary.rb
@@ -772,7 +772,7 @@ def self.try_new(ref, from: T.unsafe(nil), warn: false)
       when 1
         loaders.first
       when 2..Float::INFINITY
-        raise TapFormulaAmbiguityError.new(name, loaders.map(&:tap))
+        raise TapFormulaAmbiguityError.new(name, loaders)
       end
     end
   end