From c47d72a37602ee293b39a0f6b259114a1c2f90e2 Mon Sep 17 00:00:00 2001
From: Antoine Martin <antoine@alarsyo.net>
Date: Wed, 24 Mar 2021 19:06:03 +0100
Subject: [PATCH] matrix: don't backup cached media

---
 services/matrix.nix | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/services/matrix.nix b/services/matrix.nix
index 14a1210..56ef563 100644
--- a/services/matrix.nix
+++ b/services/matrix.nix
@@ -180,9 +180,12 @@ in {
       federationPort.public
     ];
 
-    my.services.borg-backup = mkIf cfg.enable {
-      paths = [ "/var/lib/matrix-synapse" ];
-      # FIXME: find out what I can exclude safely
+    my.services.borg-backup = let
+      dataDir = config.services.matrix-synapse.dataDir;
+    in mkIf cfg.enable {
+      paths = [ dataDir ];
+      # this is just caching for other servers media, doesn't need backup
+      exclude = [ "${dataDir}/media/remote_*" ];
     };
   };
 }