From 817b066f4b4dad161d04a03398f2261071b705e7 Mon Sep 17 00:00:00 2001
From: Robert Scott <code@humanleg.org.uk>
Date: Sun, 24 Nov 2019 23:14:51 +0000
Subject: [PATCH] nomacs: switch to using opencv4 (#72749)

opencv2 has known, unfixed security vulnerabilities. nomacs itself
states the minimum supported version is 3.4 & includes a script to
install opencv4, suggesting it is supported

darwin requires a patch to update its cmake file to make it less
restrictive over this
---
 pkgs/applications/graphics/nomacs/default.nix | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/pkgs/applications/graphics/nomacs/default.nix b/pkgs/applications/graphics/nomacs/default.nix
index 62fae518b92..48a79e8844e 100644
--- a/pkgs/applications/graphics/nomacs/default.nix
+++ b/pkgs/applications/graphics/nomacs/default.nix
@@ -1,6 +1,7 @@
 { stdenv
 , mkDerivation
 , fetchFromGitHub
+, fetchpatch
 , cmake
 , pkgconfig
 
@@ -9,7 +10,7 @@
 , qtsvg
 
 , exiv2
-, opencv
+, opencv4
 , libraw
 , libtiff
 , quazip
@@ -28,6 +29,12 @@ mkDerivation rec {
 
   patches = [
     ./nomacs-iostream.patch
+    (fetchpatch {
+      name = "darwin-less-restrictive-opencv.patch";
+      url = "https://github.com/nomacs/nomacs/commit/d182fce4bcd9a25bd15e3de065ca67849a32458c.patch";
+      sha256 = "0j6sviwrjn69nqf59hjn30c4j838h8az7rnlwcx8ymlb21vd9x2h";
+      stripLen = 1;
+    })
   ];
 
   enableParallelBuilding = true;
@@ -43,7 +50,7 @@ mkDerivation rec {
                  qttools
                  qtsvg
                  exiv2
-                 opencv
+                 opencv4
                  libraw
                  libtiff
                  quazip];