Revert "uses: properly handle untapped formulae in recursive dependency expansion"

Library/Homebrew/cmd/uses.rb

@@ -47,6 +47,7 @@ module Homebrew
 
     uses = formulae.select do |f|
       used_formulae.all? do |ff|
+        begin
           if recursive
             deps = f.recursive_dependencies do |dependent, dep|
               if dep.recommended?
@@ -56,12 +57,6 @@ module Homebrew
               elsif dep.build?
                 Dependency.prune unless includes.include?("build?")
               end
-
-            # If a tap isn't installed, we can't find the dependencies of one
-            # its formulae, and an exception will be thrown if we try.
-            if dep.is_a?(TapDependency) && !dep.tap.installed?
-              Dependency.keep_but_prune_recursive_deps
-            end
             end
             reqs = f.recursive_requirements do |dependent, req|
               if req.recommended?
@@ -91,6 +86,10 @@ module Homebrew
           reqs.any? do |req|
             req.name == ff.name || [ff.name, ff.full_name].include?(req.default_formula)
           end
+        rescue FormulaUnavailableError
+          # Silently ignore this case as we don't care about things used in
+          # taps that aren't currently tapped.
+        end
       end
     end
 

Library/Homebrew/dependency.rb

@@ -175,7 +175,7 @@ class TapDependency < Dependency
   attr_reader :tap
 
   def initialize(name, tags = [], env_proc = DEFAULT_ENV_PROC, option_names = [name.split("/").last])
-    @tap = Tap.fetch(name.rpartition("/").first)
+    @tap = name.rpartition("/").first
     super(name, tags, env_proc, option_names)
   end
 

Library/Homebrew/test/dependency_test.rb

@@ -118,11 +118,6 @@ class DependencyTests < Homebrew::TestCase
 end
 
 class TapDependencyTests < Homebrew::TestCase
-  def test_tap
-    dep = TapDependency.new("foo/bar/dog")
-    assert_equal Tap.new("foo", "bar"), dep.tap
-  end
-
   def test_option_names
     dep = TapDependency.new("foo/bar/dog")
     assert_equal %w[dog], dep.option_names