From ffc586cf49c0ded1026e92b0fa8d9cb2805be6ba Mon Sep 17 00:00:00 2001
From: Ricardo Ardissone <ricardo.ardissone@gmail.com>
Date: Sun, 16 Dec 2018 09:30:10 -0200
Subject: [PATCH 1/4] fluidsynth_1: init at 1.1.11

---
 .../applications/audio/fluidsynth/default.nix | 23 +++++++++++++++----
 pkgs/top-level/all-packages.nix               |  1 +
 2 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/pkgs/applications/audio/fluidsynth/default.nix b/pkgs/applications/audio/fluidsynth/default.nix
index 33ac7218778..8727c49398e 100644
--- a/pkgs/applications/audio/fluidsynth/default.nix
+++ b/pkgs/applications/audio/fluidsynth/default.nix
@@ -1,17 +1,32 @@
 { stdenv, lib, fetchFromGitHub, pkgconfig, cmake
 , alsaLib, glib, libjack2, libsndfile, libpulseaudio
 , AudioUnit, CoreAudio, CoreMIDI, CoreServices
+, version ? "2"
 }:
 
+let
+  versionMap = {
+    "1" = {
+      fluidsynthVersion = "1.1.11";
+      sha256 = "0n75jq3xgq46hfmjkaaxz3gic77shs4fzajq40c8gk043i84xbdh";
+    };
+    "2" = {
+      fluidsynthVersion = "2.0.1";
+      sha256 = "1mqyym5qkh8xd1rqj3yhfxbw5dxjcrljb6nkfqzvcarlv4h6rjn7";
+    };
+  };
+in
+
+with versionMap.${version};
+
 stdenv.mkDerivation  rec {
-  name = "fluidsynth-${version}";
-  version = "2.0.1";
+  name = "fluidsynth-${fluidsynthVersion}";
 
   src = fetchFromGitHub {
     owner = "FluidSynth";
     repo = "fluidsynth";
-    rev = "v${version}";
-    sha256 = "1mqyym5qkh8xd1rqj3yhfxbw5dxjcrljb6nkfqzvcarlv4h6rjn7";
+    rev = "v${fluidsynthVersion}";
+    inherit sha256;
   };
 
   nativeBuildInputs = [ pkgconfig cmake ];
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 64ef63f55ab..82db9a17f38 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -16836,6 +16836,7 @@ in
   fluidsynth = callPackage ../applications/audio/fluidsynth {
      inherit (darwin.apple_sdk.frameworks) AudioUnit CoreAudio CoreMIDI CoreServices;
   };
+  fluidsynth_1 = fluidsynth.override { version = "1"; };
 
   fmit = libsForQt5.callPackage ../applications/audio/fmit { };
 

From 86fac8b52863dac169f92c9b5abb286244a8db28 Mon Sep 17 00:00:00 2001
From: Ricardo Ardissone <ricardo.ardissone@gmail.com>
Date: Sun, 16 Dec 2018 09:30:16 -0200
Subject: [PATCH 2/4] csound: depend on fluidsynth_1

csound is incompatible with fluidsynth 2
https://github.com/csound/csound/issues/1078
---
 pkgs/top-level/all-packages.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 82db9a17f38..bb1be7dc2e4 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -16267,7 +16267,9 @@ in
 
   csa = callPackage ../applications/audio/csa { };
 
-  csound = callPackage ../applications/audio/csound { };
+  csound = callPackage ../applications/audio/csound {
+    fluidsynth = fluidsynth_1;
+  };
 
   cinepaint = callPackage ../applications/graphics/cinepaint {
     fltk = fltk13;

From 6bdcc10767dd0c3c96ad1a3c24b4bae38bea3fe1 Mon Sep 17 00:00:00 2001
From: Linus Heckemann <git@sphalerite.org>
Date: Tue, 18 Dec 2018 09:30:32 +0100
Subject: [PATCH 3/4] fluidsynth: keep version

This avoids a mass-rebuild for packages which depend on fluidsynth 2.x.
---
 pkgs/applications/audio/fluidsynth/default.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pkgs/applications/audio/fluidsynth/default.nix b/pkgs/applications/audio/fluidsynth/default.nix
index 8727c49398e..d40544a0fa4 100644
--- a/pkgs/applications/audio/fluidsynth/default.nix
+++ b/pkgs/applications/audio/fluidsynth/default.nix
@@ -21,6 +21,7 @@ with versionMap.${version};
 
 stdenv.mkDerivation  rec {
   name = "fluidsynth-${fluidsynthVersion}";
+  version = fluidsynthVersion;
 
   src = fetchFromGitHub {
     owner = "FluidSynth";

From a532c6318ac2ad112f9c9ac9f6c5455db0633c9f Mon Sep 17 00:00:00 2001
From: Linus Heckemann <git@sphalerite.org>
Date: Tue, 18 Dec 2018 09:46:15 +0100
Subject: [PATCH 4/4] csound: document temp dependency on fluidsynth 1

---
 pkgs/applications/audio/csound/default.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/applications/audio/csound/default.nix b/pkgs/applications/audio/csound/default.nix
index da3cff0bac2..450ece6a12f 100644
--- a/pkgs/applications/audio/csound/default.nix
+++ b/pkgs/applications/audio/csound/default.nix
@@ -14,6 +14,9 @@
 
 stdenv.mkDerivation rec {
   name = "csound-${version}";
+  # When updating, please check if https://github.com/csound/csound/issues/1078
+  # has been fixed in the new version so we can use the normal fluidsynth
+  # version and remove fluidsynth 1.x from nixpkgs again.
   version = "6.12.0";
 
   enableParallelBuilding = true;