From 4f732a01705041c78d9646e6eabfe3f4eb1d6629 Mon Sep 17 00:00:00 2001
From: Mike McQuaid <mike@mikemcquaid.com>
Date: Mon, 16 Dec 2019 11:23:55 +0000
Subject: [PATCH] cmd/info: fix --json argument handling.

`--all` and `--installed` do not require formulae arguments.

Fixes https://github.com/Homebrew/brew/issues/6842
---
 Library/Homebrew/cmd/info.rb | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Library/Homebrew/cmd/info.rb b/Library/Homebrew/cmd/info.rb
index 4077d7f3ee..0f95eaa9e7 100644
--- a/Library/Homebrew/cmd/info.rb
+++ b/Library/Homebrew/cmd/info.rb
@@ -78,7 +78,9 @@ module Homebrew
 
     if args.json
       raise UsageError, "Invalid JSON version: #{args.json}" unless ["v1", true].include? args.json
-      raise UsageError, "This command's option requires a formula argument" if ARGV.named.empty?
+      if !(args.all? || args.installed?) && ARGV.named.blank?
+        raise UsageError, "This command's option requires a formula argument"
+      end
 
       print_json
     elsif args.github?