From 9ecdf117b3f8b68dde5bc98407ffffc9f73cc5bc Mon Sep 17 00:00:00 2001
From: Markus Reiter <me@reitermark.us>
Date: Fri, 11 Dec 2020 22:15:18 +0100
Subject: [PATCH] Fix broken output on CI.

---
 Library/Homebrew/brew.rb | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Library/Homebrew/brew.rb b/Library/Homebrew/brew.rb
index a9c619c360..ca712613e4 100644
--- a/Library/Homebrew/brew.rb
+++ b/Library/Homebrew/brew.rb
@@ -46,6 +46,11 @@ end
 begin
   trap("INT", std_trap) # restore default CTRL-C handler
 
+  if ENV["CI"]
+    $stdout.sync = true
+    $stderr.sync = true
+  end
+
   empty_argv = ARGV.empty?
   help_flag_list = %w[-h --help --usage -?]
   help_flag = !ENV["HOMEBREW_HELP"].nil?