From 5be4c9b5e0986c994fd1b0d81b117b48f317d8ee Mon Sep 17 00:00:00 2001
From: Markus Reiter <me@reitermark.us>
Date: Wed, 25 Nov 2020 17:03:23 +0100
Subject: [PATCH] Upgrade `typed` sigils.

---
 Library/Homebrew/cask/artifact/prefpane.rb                   | 2 +-
 Library/Homebrew/cask/artifact/suite.rb                      | 2 +-
 Library/Homebrew/cask/cmd/abstract_internal_command.rb       | 2 +-
 Library/Homebrew/cask/cmd/cat.rb                             | 2 +-
 Library/Homebrew/cask/cmd/internal_help.rb                   | 2 +-
 Library/Homebrew/cmd/--cellar.rb                             | 2 +-
 Library/Homebrew/cmd/--prefix.rb                             | 2 +-
 Library/Homebrew/cmd/--repository.rb                         | 2 +-
 Library/Homebrew/cmd/--version.rb                            | 2 +-
 Library/Homebrew/cmd/analytics.rb                            | 2 +-
 Library/Homebrew/cmd/autoremove.rb                           | 2 +-
 Library/Homebrew/cmd/cleanup.rb                              | 2 +-
 Library/Homebrew/cmd/config.rb                               | 2 +-
 Library/Homebrew/cmd/gist-logs.rb                            | 2 +-
 Library/Homebrew/cmd/leaves.rb                               | 2 +-
 Library/Homebrew/cmd/link.rb                                 | 2 +-
 Library/Homebrew/cmd/migrate.rb                              | 2 +-
 Library/Homebrew/cmd/missing.rb                              | 2 +-
 Library/Homebrew/cmd/pin.rb                                  | 2 +-
 Library/Homebrew/cmd/postinstall.rb                          | 2 +-
 Library/Homebrew/cmd/readall.rb                              | 2 +-
 Library/Homebrew/cmd/switch.rb                               | 2 +-
 Library/Homebrew/cmd/tap.rb                                  | 2 +-
 Library/Homebrew/cmd/unlink.rb                               | 2 +-
 Library/Homebrew/cmd/unpin.rb                                | 2 +-
 Library/Homebrew/cmd/untap.rb                                | 2 +-
 Library/Homebrew/compat/language/haskell.rb                  | 2 +-
 Library/Homebrew/dev-cmd/bump-revision.rb                    | 2 +-
 Library/Homebrew/dev-cmd/bump.rb                             | 2 +-
 Library/Homebrew/dev-cmd/command.rb                          | 2 +-
 Library/Homebrew/dev-cmd/dispatch-build-bottle.rb            | 2 +-
 Library/Homebrew/dev-cmd/diy.rb                              | 2 +-
 Library/Homebrew/dev-cmd/edit.rb                             | 2 +-
 Library/Homebrew/dev-cmd/formula.rb                          | 2 +-
 Library/Homebrew/dev-cmd/install-bundler-gems.rb             | 2 +-
 Library/Homebrew/dev-cmd/linkage.rb                          | 2 +-
 Library/Homebrew/dev-cmd/livecheck.rb                        | 2 +-
 Library/Homebrew/dev-cmd/mirror.rb                           | 2 +-
 Library/Homebrew/dev-cmd/release-notes.rb                    | 2 +-
 Library/Homebrew/dev-cmd/style.rb                            | 2 +-
 Library/Homebrew/dev-cmd/update-license-data.rb              | 2 +-
 Library/Homebrew/dev-cmd/update-python-resources.rb          | 2 +-
 .../extend/os/linux/requirements/xcode_requirement.rb        | 5 ++++-
 Library/Homebrew/extend/os/mac/extend/ENV/shared.rb          | 2 +-
 Library/Homebrew/extend/os/requirements/xcode_requirement.rb | 2 +-
 Library/Homebrew/formula_text_auditor.rb                     | 2 +-
 Library/Homebrew/language/node.rb                            | 2 +-
 Library/Homebrew/requirement.rb                              | 2 +-
 Library/Homebrew/requirements/linux_requirement.rb           | 2 +-
 Library/Homebrew/requirements/xcode_requirement.rb           | 1 +
 Library/Homebrew/resource.rb                                 | 2 +-
 Library/Homebrew/resource_auditor.rb                         | 2 +-
 Library/Homebrew/rubocops/cask/extend/string.rb              | 2 +-
 Library/Homebrew/system_command.rb                           | 2 +-
 .../test/support/helper/cmd/brew-verify-formula-undefined.rb | 2 +-
 55 files changed, 58 insertions(+), 54 deletions(-)

diff --git a/Library/Homebrew/cask/artifact/prefpane.rb b/Library/Homebrew/cask/artifact/prefpane.rb
index 8dc2df4559..a2a1057b34 100644
--- a/Library/Homebrew/cask/artifact/prefpane.rb
+++ b/Library/Homebrew/cask/artifact/prefpane.rb
@@ -1,4 +1,4 @@
-# typed: true
+# typed: strict
 # frozen_string_literal: true
 
 require "cask/artifact/moved"
diff --git a/Library/Homebrew/cask/artifact/suite.rb b/Library/Homebrew/cask/artifact/suite.rb
index 043b4f0b9e..5eb8462640 100644
--- a/Library/Homebrew/cask/artifact/suite.rb
+++ b/Library/Homebrew/cask/artifact/suite.rb
@@ -1,4 +1,4 @@
-# typed: true
+# typed: strict
 # frozen_string_literal: true
 
 require "cask/artifact/moved"
diff --git a/Library/Homebrew/cask/cmd/abstract_internal_command.rb b/Library/Homebrew/cask/cmd/abstract_internal_command.rb
index a0a45e8b1b..0fb1e2152c 100644
--- a/Library/Homebrew/cask/cmd/abstract_internal_command.rb
+++ b/Library/Homebrew/cask/cmd/abstract_internal_command.rb
@@ -1,4 +1,4 @@
-# typed: true
+# typed: strict
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask/cmd/cat.rb b/Library/Homebrew/cask/cmd/cat.rb
index d5d2afdc6a..bb741992ea 100644
--- a/Library/Homebrew/cask/cmd/cat.rb
+++ b/Library/Homebrew/cask/cmd/cat.rb
@@ -1,4 +1,4 @@
-# typed: true
+# typed: strict
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask/cmd/internal_help.rb b/Library/Homebrew/cask/cmd/internal_help.rb
index 3f6476e29a..98f1011d4c 100644
--- a/Library/Homebrew/cask/cmd/internal_help.rb
+++ b/Library/Homebrew/cask/cmd/internal_help.rb
@@ -1,4 +1,4 @@
-# typed: true
+# typed: strict
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cmd/--cellar.rb b/Library/Homebrew/cmd/--cellar.rb
index 2af781142c..a4be852c20 100644
--- a/Library/Homebrew/cmd/--cellar.rb
+++ b/Library/Homebrew/cmd/--cellar.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/cmd/--prefix.rb b/Library/Homebrew/cmd/--prefix.rb
index 42410ab30a..c21b187495 100644
--- a/Library/Homebrew/cmd/--prefix.rb
+++ b/Library/Homebrew/cmd/--prefix.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/cmd/--repository.rb b/Library/Homebrew/cmd/--repository.rb
index c27c4589fd..3f68fa9c4c 100644
--- a/Library/Homebrew/cmd/--repository.rb
+++ b/Library/Homebrew/cmd/--repository.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/cmd/--version.rb b/Library/Homebrew/cmd/--version.rb
index ff038f7096..de305d3579 100644
--- a/Library/Homebrew/cmd/--version.rb
+++ b/Library/Homebrew/cmd/--version.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/cmd/analytics.rb b/Library/Homebrew/cmd/analytics.rb
index 0efdf6afe1..aa64043274 100644
--- a/Library/Homebrew/cmd/analytics.rb
+++ b/Library/Homebrew/cmd/analytics.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/cmd/autoremove.rb b/Library/Homebrew/cmd/autoremove.rb
index 21c211cfea..e65d3a59b0 100644
--- a/Library/Homebrew/cmd/autoremove.rb
+++ b/Library/Homebrew/cmd/autoremove.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/cmd/cleanup.rb b/Library/Homebrew/cmd/cleanup.rb
index 0c7ac6df81..786c28eee3 100644
--- a/Library/Homebrew/cmd/cleanup.rb
+++ b/Library/Homebrew/cmd/cleanup.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "cleanup"
diff --git a/Library/Homebrew/cmd/config.rb b/Library/Homebrew/cmd/config.rb
index 970af3093a..3153cdd54b 100644
--- a/Library/Homebrew/cmd/config.rb
+++ b/Library/Homebrew/cmd/config.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "system_config"
diff --git a/Library/Homebrew/cmd/gist-logs.rb b/Library/Homebrew/cmd/gist-logs.rb
index a42d2457f9..d264c86151 100644
--- a/Library/Homebrew/cmd/gist-logs.rb
+++ b/Library/Homebrew/cmd/gist-logs.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/cmd/leaves.rb b/Library/Homebrew/cmd/leaves.rb
index f4c2c471a7..11563f2e30 100644
--- a/Library/Homebrew/cmd/leaves.rb
+++ b/Library/Homebrew/cmd/leaves.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/cmd/link.rb b/Library/Homebrew/cmd/link.rb
index 98a265d610..b8a3204712 100644
--- a/Library/Homebrew/cmd/link.rb
+++ b/Library/Homebrew/cmd/link.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "ostruct"
diff --git a/Library/Homebrew/cmd/migrate.rb b/Library/Homebrew/cmd/migrate.rb
index b5bf51a008..db71a53dfb 100644
--- a/Library/Homebrew/cmd/migrate.rb
+++ b/Library/Homebrew/cmd/migrate.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "migrator"
diff --git a/Library/Homebrew/cmd/missing.rb b/Library/Homebrew/cmd/missing.rb
index 4ab86a49fc..4eabe779ee 100644
--- a/Library/Homebrew/cmd/missing.rb
+++ b/Library/Homebrew/cmd/missing.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/cmd/pin.rb b/Library/Homebrew/cmd/pin.rb
index b777ac3b5f..ce0b48ffa7 100644
--- a/Library/Homebrew/cmd/pin.rb
+++ b/Library/Homebrew/cmd/pin.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/cmd/postinstall.rb b/Library/Homebrew/cmd/postinstall.rb
index ce7113833d..de70cae3d5 100644
--- a/Library/Homebrew/cmd/postinstall.rb
+++ b/Library/Homebrew/cmd/postinstall.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "sandbox"
diff --git a/Library/Homebrew/cmd/readall.rb b/Library/Homebrew/cmd/readall.rb
index 7a2361036c..353733bc9d 100644
--- a/Library/Homebrew/cmd/readall.rb
+++ b/Library/Homebrew/cmd/readall.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "readall"
diff --git a/Library/Homebrew/cmd/switch.rb b/Library/Homebrew/cmd/switch.rb
index 3f3e4baaf3..a25cccce48 100644
--- a/Library/Homebrew/cmd/switch.rb
+++ b/Library/Homebrew/cmd/switch.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/cmd/tap.rb b/Library/Homebrew/cmd/tap.rb
index 86e7a0fc1b..8dab836970 100644
--- a/Library/Homebrew/cmd/tap.rb
+++ b/Library/Homebrew/cmd/tap.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/cmd/unlink.rb b/Library/Homebrew/cmd/unlink.rb
index 1036b8eaf9..43a9a8dca1 100644
--- a/Library/Homebrew/cmd/unlink.rb
+++ b/Library/Homebrew/cmd/unlink.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "ostruct"
diff --git a/Library/Homebrew/cmd/unpin.rb b/Library/Homebrew/cmd/unpin.rb
index 1f650adae1..0c1b7fcbcf 100644
--- a/Library/Homebrew/cmd/unpin.rb
+++ b/Library/Homebrew/cmd/unpin.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/cmd/untap.rb b/Library/Homebrew/cmd/untap.rb
index d3e70e7e5e..b83667fed6 100644
--- a/Library/Homebrew/cmd/untap.rb
+++ b/Library/Homebrew/cmd/untap.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/compat/language/haskell.rb b/Library/Homebrew/compat/language/haskell.rb
index 00f6466807..ccb7901681 100644
--- a/Library/Homebrew/compat/language/haskell.rb
+++ b/Library/Homebrew/compat/language/haskell.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 module Language
diff --git a/Library/Homebrew/dev-cmd/bump-revision.rb b/Library/Homebrew/dev-cmd/bump-revision.rb
index 745fef7717..18d2a94379 100644
--- a/Library/Homebrew/dev-cmd/bump-revision.rb
+++ b/Library/Homebrew/dev-cmd/bump-revision.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/dev-cmd/bump.rb b/Library/Homebrew/dev-cmd/bump.rb
index 00f51e8870..adf8878735 100644
--- a/Library/Homebrew/dev-cmd/bump.rb
+++ b/Library/Homebrew/dev-cmd/bump.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/dev-cmd/command.rb b/Library/Homebrew/dev-cmd/command.rb
index 9beb128138..eb946cf636 100644
--- a/Library/Homebrew/dev-cmd/command.rb
+++ b/Library/Homebrew/dev-cmd/command.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "commands"
diff --git a/Library/Homebrew/dev-cmd/dispatch-build-bottle.rb b/Library/Homebrew/dev-cmd/dispatch-build-bottle.rb
index fbb867e8ae..21d5af7617 100644
--- a/Library/Homebrew/dev-cmd/dispatch-build-bottle.rb
+++ b/Library/Homebrew/dev-cmd/dispatch-build-bottle.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/dev-cmd/diy.rb b/Library/Homebrew/dev-cmd/diy.rb
index aba0a000ff..8a11fa2d76 100644
--- a/Library/Homebrew/dev-cmd/diy.rb
+++ b/Library/Homebrew/dev-cmd/diy.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/dev-cmd/edit.rb b/Library/Homebrew/dev-cmd/edit.rb
index dc4a814e5a..e06b67eaad 100644
--- a/Library/Homebrew/dev-cmd/edit.rb
+++ b/Library/Homebrew/dev-cmd/edit.rb
@@ -1,4 +1,4 @@
-# typed: true
+# typed: strict
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/dev-cmd/formula.rb b/Library/Homebrew/dev-cmd/formula.rb
index cee7263e9a..17bfd4a806 100644
--- a/Library/Homebrew/dev-cmd/formula.rb
+++ b/Library/Homebrew/dev-cmd/formula.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/dev-cmd/install-bundler-gems.rb b/Library/Homebrew/dev-cmd/install-bundler-gems.rb
index ce80576cb1..d1c3bd88d6 100644
--- a/Library/Homebrew/dev-cmd/install-bundler-gems.rb
+++ b/Library/Homebrew/dev-cmd/install-bundler-gems.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/dev-cmd/linkage.rb b/Library/Homebrew/dev-cmd/linkage.rb
index 4f161f8039..63ae8066a1 100644
--- a/Library/Homebrew/dev-cmd/linkage.rb
+++ b/Library/Homebrew/dev-cmd/linkage.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "cache_store"
diff --git a/Library/Homebrew/dev-cmd/livecheck.rb b/Library/Homebrew/dev-cmd/livecheck.rb
index 2e6ab72334..26af2ffb88 100644
--- a/Library/Homebrew/dev-cmd/livecheck.rb
+++ b/Library/Homebrew/dev-cmd/livecheck.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/dev-cmd/mirror.rb b/Library/Homebrew/dev-cmd/mirror.rb
index 29c238f6a9..ec6f44d8fc 100644
--- a/Library/Homebrew/dev-cmd/mirror.rb
+++ b/Library/Homebrew/dev-cmd/mirror.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "bintray"
diff --git a/Library/Homebrew/dev-cmd/release-notes.rb b/Library/Homebrew/dev-cmd/release-notes.rb
index 3e7286cdc4..26cbe6e5e1 100644
--- a/Library/Homebrew/dev-cmd/release-notes.rb
+++ b/Library/Homebrew/dev-cmd/release-notes.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/dev-cmd/style.rb b/Library/Homebrew/dev-cmd/style.rb
index 611ab05ce0..c0112ef519 100644
--- a/Library/Homebrew/dev-cmd/style.rb
+++ b/Library/Homebrew/dev-cmd/style.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "json"
diff --git a/Library/Homebrew/dev-cmd/update-license-data.rb b/Library/Homebrew/dev-cmd/update-license-data.rb
index c41c6ace7f..ef51979c7e 100644
--- a/Library/Homebrew/dev-cmd/update-license-data.rb
+++ b/Library/Homebrew/dev-cmd/update-license-data.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/dev-cmd/update-python-resources.rb b/Library/Homebrew/dev-cmd/update-python-resources.rb
index 936dad5aba..a66710f516 100644
--- a/Library/Homebrew/dev-cmd/update-python-resources.rb
+++ b/Library/Homebrew/dev-cmd/update-python-resources.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/extend/os/linux/requirements/xcode_requirement.rb b/Library/Homebrew/extend/os/linux/requirements/xcode_requirement.rb
index caa020aba4..8ebc4ecd72 100644
--- a/Library/Homebrew/extend/os/linux/requirements/xcode_requirement.rb
+++ b/Library/Homebrew/extend/os/linux/requirements/xcode_requirement.rb
@@ -1,9 +1,12 @@
-# typed: false
+# typed: strict
 # frozen_string_literal: true
 
 require "requirement"
 
 class XcodeRequirement < Requirement
+  extend T::Sig
+
+  sig { returns(T::Boolean) }
   def xcode_installed_version
     true
   end
diff --git a/Library/Homebrew/extend/os/mac/extend/ENV/shared.rb b/Library/Homebrew/extend/os/mac/extend/ENV/shared.rb
index d882025a2b..4b8c366ef7 100644
--- a/Library/Homebrew/extend/os/mac/extend/ENV/shared.rb
+++ b/Library/Homebrew/extend/os/mac/extend/ENV/shared.rb
@@ -1,4 +1,4 @@
-# typed: true
+# typed: strict
 # frozen_string_literal: true
 
 module SharedEnvExtension
diff --git a/Library/Homebrew/extend/os/requirements/xcode_requirement.rb b/Library/Homebrew/extend/os/requirements/xcode_requirement.rb
index d8895dbfac..e14c754593 100644
--- a/Library/Homebrew/extend/os/requirements/xcode_requirement.rb
+++ b/Library/Homebrew/extend/os/requirements/xcode_requirement.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: strict
 # frozen_string_literal: true
 
 require "extend/os/linux/requirements/xcode_requirement" if OS.linux?
diff --git a/Library/Homebrew/formula_text_auditor.rb b/Library/Homebrew/formula_text_auditor.rb
index 02c6069d35..b4bcc52453 100644
--- a/Library/Homebrew/formula_text_auditor.rb
+++ b/Library/Homebrew/formula_text_auditor.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 module Homebrew
diff --git a/Library/Homebrew/language/node.rb b/Library/Homebrew/language/node.rb
index 1e5e48f7b5..d59d433295 100644
--- a/Library/Homebrew/language/node.rb
+++ b/Library/Homebrew/language/node.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 module Language
diff --git a/Library/Homebrew/requirement.rb b/Library/Homebrew/requirement.rb
index 11a87bc433..e609aa77d4 100644
--- a/Library/Homebrew/requirement.rb
+++ b/Library/Homebrew/requirement.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "dependable"
diff --git a/Library/Homebrew/requirements/linux_requirement.rb b/Library/Homebrew/requirements/linux_requirement.rb
index 410c39bcc4..36b70585ac 100644
--- a/Library/Homebrew/requirements/linux_requirement.rb
+++ b/Library/Homebrew/requirements/linux_requirement.rb
@@ -1,4 +1,4 @@
-# typed: true
+# typed: strict
 # frozen_string_literal: true
 
 # A requirement on Linux.
diff --git a/Library/Homebrew/requirements/xcode_requirement.rb b/Library/Homebrew/requirements/xcode_requirement.rb
index 775d62fc56..ccc8412b84 100644
--- a/Library/Homebrew/requirements/xcode_requirement.rb
+++ b/Library/Homebrew/requirements/xcode_requirement.rb
@@ -20,6 +20,7 @@ class XcodeRequirement < Requirement
     super(tags)
   end
 
+  sig { returns(T::Boolean) }
   def xcode_installed_version
     return false unless MacOS::Xcode.installed?
     return true unless @version
diff --git a/Library/Homebrew/resource.rb b/Library/Homebrew/resource.rb
index c2a2b749a8..c9204457e0 100644
--- a/Library/Homebrew/resource.rb
+++ b/Library/Homebrew/resource.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "download_strategy"
diff --git a/Library/Homebrew/resource_auditor.rb b/Library/Homebrew/resource_auditor.rb
index f386eb511a..5e0e941a22 100644
--- a/Library/Homebrew/resource_auditor.rb
+++ b/Library/Homebrew/resource_auditor.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 module Homebrew
diff --git a/Library/Homebrew/rubocops/cask/extend/string.rb b/Library/Homebrew/rubocops/cask/extend/string.rb
index f4e4ee3be0..3f71c87c2f 100644
--- a/Library/Homebrew/rubocops/cask/extend/string.rb
+++ b/Library/Homebrew/rubocops/cask/extend/string.rb
@@ -1,4 +1,4 @@
-# typed: true
+# typed: strict
 # frozen_string_literal: true
 
 # Utility method extensions for String.
diff --git a/Library/Homebrew/system_command.rb b/Library/Homebrew/system_command.rb
index 33ce5069bc..d00d934895 100644
--- a/Library/Homebrew/system_command.rb
+++ b/Library/Homebrew/system_command.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "open3"
diff --git a/Library/Homebrew/test/support/helper/cmd/brew-verify-formula-undefined.rb b/Library/Homebrew/test/support/helper/cmd/brew-verify-formula-undefined.rb
index eaa659e8ae..3b08180cd1 100755
--- a/Library/Homebrew/test/support/helper/cmd/brew-verify-formula-undefined.rb
+++ b/Library/Homebrew/test/support/helper/cmd/brew-verify-formula-undefined.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: strict
 # frozen_string_literal: true
 
 require "cli/parser"