Merge pull request #17122 from Homebrew/deps-simulated-os-and-arch

cmd/deps: add `--os` and `--arch`

Library/Homebrew/cmd/deps.rb

@@ -66,6 +66,10 @@ module Homebrew
                             "debugging the `--installed`/`--eval-all` display mode."
         switch "--HEAD",
                description: "Show dependencies for HEAD version instead of stable version."
+        flag   "--os=",
+               description: "Show dependencies for the given operating system."
+        flag   "--arch=",
+               description: "Show dependencies for the given CPU architecture."
         switch "--formula", "--formulae",
                description: "Treat all named arguments as formulae."
         switch "--cask", "--casks",
@@ -82,10 +86,15 @@ module Homebrew
 
       sig { override.void }
       def run
+        raise UsageError, "`brew deps --os=all` is not supported" if args.os == "all"
+        raise UsageError, "`brew deps --arch=all` is not supported" if args.arch == "all"
+
+        os, arch = T.must(args.os_arch_combinations.first)
         all = args.eval_all?
 
         Formulary.enable_factory_cache!
 
+        SimulateSystem.with(os:, arch:) do
           recursive = !args.direct?
           installed = args.installed? || dependents(args.named.to_formulae_and_casks).all?(&:any_version_installed?)
 
@@ -97,7 +106,9 @@ module Homebrew
                                       !args.include_test? &&
                                       !args.include_optional? &&
                                       !args.skip_recommended? &&
-                                    !args.missing?
+                                      !args.missing? &&
+                                      args.os.nil? &&
+                                      args.arch.nil?
 
           if args.tree? || args.graph?
             dependents = if args.named.present?
@@ -162,6 +173,7 @@ module Homebrew
           all_deps.sort! unless args.topological?
           puts all_deps
         end
+      end
 
       private