From 96f0c2c191c50aae55715c0e7cbc93510354fcf4 Mon Sep 17 00:00:00 2001
From: Izorkin <izorkin@elven.pw>
Date: Tue, 16 Feb 2021 10:09:14 +0300
Subject: [PATCH] mastodon, nixos/mastodon: use the same nodejs package in
 package and module

---
 nixos/modules/services/web-apps/mastodon.nix |  2 +-
 pkgs/servers/mastodon/default.nix            | 12 ++++++++++--
 pkgs/top-level/all-packages.nix              |  6 +++++-
 3 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/nixos/modules/services/web-apps/mastodon.nix b/nixos/modules/services/web-apps/mastodon.nix
index 37e5f7719b7b..24aea356de4e 100644
--- a/nixos/modules/services/web-apps/mastodon.nix
+++ b/nixos/modules/services/web-apps/mastodon.nix
@@ -450,7 +450,7 @@ in {
         else { PORT = toString(cfg.streamingPort); }
       );
       serviceConfig = {
-        ExecStart = "${pkgs.nodejs-slim}/bin/node streaming";
+        ExecStart = "${cfg.package}/run-streaming.sh";
         Restart = "always";
         RestartSec = 20;
         EnvironmentFile = "/var/lib/mastodon/.secrets_env";
diff --git a/pkgs/servers/mastodon/default.nix b/pkgs/servers/mastodon/default.nix
index 8508fbe8f78b..b8582f68ebc5 100644
--- a/pkgs/servers/mastodon/default.nix
+++ b/pkgs/servers/mastodon/default.nix
@@ -1,5 +1,5 @@
 { lib, stdenv, nodejs-slim, mkYarnPackage, fetchFromGitHub, bundlerEnv
-, yarn, callPackage, imagemagick, ffmpeg, file, ruby_2_7
+, yarn, callPackage, imagemagick, ffmpeg, file, ruby_2_7, writeShellScript
 
   # Allow building a fork or custom version of Mastodon:
 , pname ? "mastodon"
@@ -96,10 +96,18 @@ stdenv.mkDerivation rec {
     ln -s /var/log/mastodon log
     ln -s /tmp tmp
   '';
+
   propagatedBuildInputs = [ imagemagick ffmpeg file mastodon-gems.wrappedRuby ];
-  installPhase = ''
+
+  installPhase = let
+    run-streaming = writeShellScript "run-streaming.sh" ''
+      # NixOS helper script to consistently use the same NodeJS version the package was built with.
+      ${nodejs-slim}/bin/node ./streaming
+    '';
+  in ''
     mkdir -p $out
     cp -r * $out/
+    ln -s ${run-streaming} $out/run-streaming.sh
   '';
 
   meta = with lib; {
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index d70c6f9bda07..85d4ff856394 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -17921,7 +17921,11 @@ in
 
   mailman-web = with python3.pkgs; toPythonApplication mailman-web;
 
-  mastodon = callPackage ../servers/mastodon { };
+  mastodon = callPackage ../servers/mastodon {
+    # With nodejs v14 the streaming endpoint breaks. Need migrate to uWebSockets.js or similar.
+    # https://github.com/tootsuite/mastodon/issues/15184
+    nodejs-slim = nodejs-slim-12_x;
+  };
 
   mattermost = callPackage ../servers/mattermost { };
   matterircd = callPackage ../servers/mattermost/matterircd.nix { };