From 2c85f26b0baf8953099d056de86b53ee769eabf4 Mon Sep 17 00:00:00 2001
From: Jonathan Chang <jchang641@gmail.com>
Date: Sat, 4 Apr 2020 15:49:30 +1100
Subject: [PATCH] formula_cellar_checks: skip unless Python libs

This avoids an unusual error message when Python is needed for building
(e.g., code generation) but is not used at runtime.

```
==> brew audit recode --online
Error: 1 problem in 1 formula detected
recode:
  * Packages have been installed for:

    but this formula depends on:
      Python 3.7
```
---
 Library/Homebrew/formula_cellar_checks.rb | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Library/Homebrew/formula_cellar_checks.rb b/Library/Homebrew/formula_cellar_checks.rb
index 6a509ee7c1..b793188396 100644
--- a/Library/Homebrew/formula_cellar_checks.rb
+++ b/Library/Homebrew/formula_cellar_checks.rb
@@ -180,6 +180,8 @@ module FormulaCellarChecks
       match.captures.first
     end.compact
 
+    return if pythons.blank?
+
     python_deps = deps.map(&:name)
                       .grep(/^python(@.*)?$/)
                       .map { |d| Formula[d].version.to_s[/^\d+\.\d+/] }