From 7c995bfdce85f4cbb996268cfc95a581ddedac43 Mon Sep 17 00:00:00 2001
From: Nathan McCarty <nathan@mccarty.io>
Date: Sun, 18 Jun 2023 16:33:10 -0400
Subject: [PATCH] Tweak borg to remove long-term server backups

---
 modules/linux/default.nix       | 4 ++++
 modules/linux/services/borg.nix | 7 ++++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/modules/linux/default.nix b/modules/linux/default.nix
index de4aa34..c651be8 100644
--- a/modules/linux/default.nix
+++ b/modules/linux/default.nix
@@ -81,6 +81,10 @@ in {
               description = "How often to run backups";
               default = "hourly";
             };
+            keepForever = mkOption {
+              description = "Keep monthly backups forever";
+              default = config.nathan.config.isDesktop;
+            };
           };
           # Nginx
           nginx = {
diff --git a/modules/linux/services/borg.nix b/modules/linux/services/borg.nix
index 9aa32e9..31da8a3 100644
--- a/modules/linux/services/borg.nix
+++ b/modules/linux/services/borg.nix
@@ -28,11 +28,16 @@ with lib; {
         environment.BORG_RSH = "ssh -i ${config.nathan.services.borg.sshKey}";
         compression = "auto,zstd";
         startAt = config.nathan.services.borg.startAt;
-        prune.keep = {
+        prune.keep = if config.nathan.services.borg.keepForever then {
           within = "7d"; # Keep all archives for the past week
           daily = 1; # Keep 1 snapshot a day for 2 weeks
           weekly = 4; # Keep 1 snapshot a week for 4 weeks
           monthly = -1; # Keep unlimited monthly backups
+        } else {
+          within = "7d"; # Keep all archives for the past week
+          daily = 1; # Keep 1 snapshot a day for 2 weeks
+          weekly = 4; # Keep 1 snapshot a week for 4 weeks
+          monthly = 3; # Keep 3 monthly backups
         };
       };
     };