Inline index_by

Library/Homebrew/extend/enumerable.rb

@@ -2,24 +2,6 @@
 # frozen_string_literal: true
 
 module Enumerable
-  # Convert an enumerable to a hash, using the block result as the key and the
-  # element as the value.
-  #
-  #   people.index_by(&:login)
-  #   # => { "nextangle" => <Person ...>, "chade-" => <Person ...>, ...}
-  #
-  #   people.index_by { |person| "#{person.first_name} #{person.last_name}" }
-  #   # => { "Chade- Fowlersburg-e" => <Person ...>, "David Heinemeier Hansson" => <Person ...>, ...}
-  def index_by(&block)
-    if block
-      result = {}
-      each { |elem| result[yield(elem)] = elem }
-      result
-    else
-      T.unsafe(self).to_enum(:index_by) { T.unsafe(self).size if respond_to?(:size) }
-    end
-  end
-
   # The negative of the <tt>Enumerable#include?</tt>. Returns +true+ if the
   # collection does not include the object.
   sig { params(object: T.untyped).returns(T::Boolean) }

Library/Homebrew/formula_installer.rb

@@ -565,8 +565,8 @@ on_request: installed_on_request?, options: options)
   def expand_requirements
     unsatisfied_reqs = Hash.new { |h, k| h[k] = [] }
     formulae = [formula]
-    formula_deps_map = formula.recursive_dependencies
-                              .index_by(&:name)
+    formula_deps_map = {}
+    formula.recursive_dependencies.each { |dep| formula_deps_map[dep.name] = dep }
 
     while (f = formulae.pop)
       runtime_requirements = runtime_requirements(f)
@@ -1206,10 +1206,11 @@ on_request: installed_on_request?, options: options)
   def fetch_bottle_tab
     @fetch_bottle_tab ||= begin
       formula.fetch_bottle_tab
-      @bottle_tab_runtime_dependencies = formula.bottle_tab_attributes
-                                                .fetch("runtime_dependencies", [])
-                                                .index_by { |dep| dep["full_name"] }
-                                                .freeze
+      @bottle_tab_runtime_dependencies = {}
+      formula.bottle_tab_attributes
+             .fetch("runtime_dependencies", [])
+             .each { |dep| @bottle_tab_runtime_dependencies[dep["full_name"]] = dep }
+      @bottle_tab_runtime_dependencies.freeze
       true
     rescue DownloadError, ArgumentError
       @fetch_bottle_tab = true