From 326321c1fdcba7717ec27e3db8cec9c0dfe15069 Mon Sep 17 00:00:00 2001
From: FnControlOption <70830482+FnControlOption@users.noreply.github.com>
Date: Wed, 25 Aug 2021 14:34:57 -0700
Subject: [PATCH] cli/parser: allow commands that look like options

---
 Library/Homebrew/cli/parser.rb           |  3 ++-
 Library/Homebrew/test/cli/parser_spec.rb | 14 ++++++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/Library/Homebrew/cli/parser.rb b/Library/Homebrew/cli/parser.rb
index e4ce0c784b..159f3ddf85 100644
--- a/Library/Homebrew/cli/parser.rb
+++ b/Library/Homebrew/cli/parser.rb
@@ -264,6 +264,7 @@ module Homebrew
         remaining = []
 
         argv, non_options = split_non_options(argv)
+        allow_commands = Array(@named_args_type).include?(:command)
 
         while i < argv.count
           begin
@@ -279,7 +280,7 @@ module Homebrew
               i += 1
             end
           rescue OptionParser::InvalidOption
-            if ignore_invalid_options
+            if ignore_invalid_options || (allow_commands && Commands.path(arg))
               remaining << arg
             else
               $stderr.puts generate_help_text
diff --git a/Library/Homebrew/test/cli/parser_spec.rb b/Library/Homebrew/test/cli/parser_spec.rb
index 30f8d4d225..69eea85296 100644
--- a/Library/Homebrew/test/cli/parser_spec.rb
+++ b/Library/Homebrew/test/cli/parser_spec.rb
@@ -559,5 +559,19 @@ describe Homebrew::CLI::Parser do
         Homebrew::CLI::MaxNamedArgumentsError, /This command does not take more than 1 formula or cask argument/
       )
     end
+
+    it "accepts commands with :command" do
+      parser = described_class.new do
+        named_args :command
+      end
+      expect { parser.parse(["--prefix", "--version"]) }.not_to raise_error
+    end
+
+    it "doesn't accept invalid options with :command" do
+      parser = described_class.new do
+        named_args :command
+      end
+      expect { parser.parse(["--not-a-command"]) }.to raise_error(OptionParser::InvalidOption, /--not-a-command/)
+    end
   end
 end