neomutt: 20200320 -> 20200417

https://github.com/neomutt/neomutt/releases/tag/20200417

To fix the tests, I had to copy the recently created
`neomutt-test-files`[1] repository into the build-environment.

Also applied a patch from master[2] which ensures that the
`change-folder` macro actually switches to the specified folder.

[1] https://github.com/neomutt/neomutt-test-files
[2] neomutt/neomutt@9e7537c

pkgs/applications/networking/mailreaders/neomutt/default.nix

@@ -1,19 +1,29 @@
 { stdenv, fetchFromGitHub, gettext, makeWrapper, tcl, which, writeScript
 , ncurses, perl , cyrus_sasl, gss, gpgme, kerberos, libidn, libxml2, notmuch, openssl
 , lmdb, libxslt, docbook_xsl, docbook_xml_dtd_42, mailcap, runtimeShell, sqlite, zlib
+, fetchpatch
 }:
 
 stdenv.mkDerivation rec {
-  version = "20200320";
+  version = "20200417";
   pname = "neomutt";
 
   src = fetchFromGitHub {
     owner  = "neomutt";
     repo   = "neomutt";
     rev    = version;
-    sha256 = "06xcl9pr8dna4kqjaqm7ss50gdy185425bwl31i0xs3l11cyjap4";
+    sha256 = "0s7943r2s14kavyjf7i70vca252l626539i09a9vk0i9sfi35vx5";
   };
 
+  patches = [
+    # Remove on next release. Fixes the `change-folder`
+    # macro (https://github.com/neomutt/neomutt/issues/2268)
+    (fetchpatch {
+      url = "https://github.com/neomutt/neomutt/commit/9e7537caddb9c6adc720bb3322a7512cf51ab025.patch";
+      sha256 = "1vmlvgnhx1ra3rnyjkpkv6lrqw8xfh2kkmqp43fqn9lnk3pkjxvv";
+    })
+  ];
+
   buildInputs = [
     cyrus_sasl gss gpgme kerberos libidn ncurses
     notmuch openssl perl lmdb
@@ -75,7 +85,20 @@ stdenv.mkDerivation rec {
 
   doCheck = true;
 
+  preCheck = ''
+    cp -r ${fetchFromGitHub {
+      owner = "neomutt";
+      repo = "neomutt-test-files";
+      rev = "1ee274e9ae1330fb901eb7b8275b3079d7869222";
+      sha256 = "0dhilz4rr7616jh8jcvh50a3rr09in43nsv72mm6f3vfklcqincp";
+    }} $(pwd)/test-files
+    (cd test-files && ./setup.sh)
+
+    export NEOMUTT_TEST_DIR=$(pwd)/test-files
+  '';
+
   checkTarget = "test";
+  postCheck = "unset NEOMUTT_TEST_DIR";
 
   meta = with stdenv.lib; {
     description = "A small but very powerful text-based mail client";