From f6b260d7c4b04a353c6ca42bd07941251316740f Mon Sep 17 00:00:00 2001
From: hyuraku <32809703+hyuraku@users.noreply.github.com>
Date: Sun, 22 Mar 2020 22:00:32 +0900
Subject: [PATCH] audit whether prerelease or not

---
 Library/Homebrew/dev-cmd/audit.rb | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Library/Homebrew/dev-cmd/audit.rb b/Library/Homebrew/dev-cmd/audit.rb
index d83a5bea1d..67028a2a6a 100644
--- a/Library/Homebrew/dev-cmd/audit.rb
+++ b/Library/Homebrew/dev-cmd/audit.rb
@@ -795,6 +795,13 @@ module Homebrew
         return if stable_url_minor_version.even?
 
         problem "#{stable.version} is a development release"
+      when  %r(^https://github.com/)
+        repo_url = URI.parse(stable.url)
+        path = repo_url.path.split('/')
+        owner = path[1]
+        repo = path[2]
+        return unless GitHub.open_api("#{GitHub::API_URL}/repos/#{owner}/#{repo}/releases/tags/#{stable.version}")["prerelease"]
+        problem "#{stable.version} is a pre release"
       end
     end