From aa00797877e972af9ec68194bde23b9e53f56fbb Mon Sep 17 00:00:00 2001
From: Danny Milosavljevic <dannym@scratchpost.org>
Date: Wed, 5 Dec 2018 14:55:02 +0100
Subject: [PATCH] gnu: beets: Make it compatible with Python 3.7.

* gnu/packages/music.scm (beets)[arguments]<#:phases>
[make-python3.7-compatible]: New phase.
---
 gnu/packages/music.scm | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/gnu/packages/music.scm b/gnu/packages/music.scm
index b59f258ae5..2314fdc442 100644
--- a/gnu/packages/music.scm
+++ b/gnu/packages/music.scm
@@ -2704,6 +2704,12 @@ Songs can be searched by artist, name or even by a part of the song text.")
            (lambda _
              (setenv "HOME" (string-append (getcwd) "/tmp"))
              #t))
+         (add-after 'unpack 'make-python3.7-compatible
+           (lambda _
+             ;; See <https://github.com/beetbox/beets/issues/2978>.
+             (substitute* "beets/autotag/hooks.py"
+              (("re\\._pattern_type") "re.Pattern"))
+             #t))
          (replace 'check
            (lambda _
              (invoke "nosetests" "-v"))))))