From 01d2927a4eb9f2753c5e2c4e5af820dca18cc9fc Mon Sep 17 00:00:00 2001
From: Gregor Kleen <gkleen@yggdrasil.li>
Date: Sun, 17 Dec 2017 14:30:52 +0100
Subject: =?UTF-8?q?=E2=80=A6?=
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---
 custom/borgbackup.nix | 40 ++++++++++++++++++++++++++++++----------
 1 file changed, 30 insertions(+), 10 deletions(-)

diff --git a/custom/borgbackup.nix b/custom/borgbackup.nix
index 9047d72e..70647334 100644
--- a/custom/borgbackup.nix
+++ b/custom/borgbackup.nix
@@ -69,7 +69,17 @@ in {
       };
     }) (flatten (mapAttrsToList (target: tCfg: map (path: { inherit target path tCfg; }) tCfg.paths) cfg.targets)));
 
-    systemd.services = listToAttrs (map ({ target, path,  tCfg }: nameValuePair "borgbackup-${target}@${path}" (let
+    systemd.timers = mapAttrs (target: tCfg: nameValuePair "borgbackup-prune-${target}" {
+      wantedBy = [ "timers.target" ];
+
+      timerConfig = {
+        Persistent = false;
+        OnBootSec = tCfg.interval;
+        OnUnitInactiveSec = tCfg.interval;
+      };
+    }) cfg.targets;
+
+    systemd.services = mapAttrs (target: tCfg: nameValuePair "borgbackup-${target}@" (let
       deps = flatten [
         (optional (cfg.snapshots == "btrfs") "btrfs-snapshot@%p.service")
         (optional tCfg.network "network-online.target")
@@ -92,16 +102,10 @@ in {
             --patterns-from .backup \
             --one-file-system \
             --compression auto,lzma \
-            ${tCfg.repo}::${cfg.prefix}${path}-{utcnow}
+            ${tCfg.repo}::${cfg.prefix}$1-{utcnow}
         '';
       in if tCfg.lock == null then borgCmd else "flock -xo /var/lock/${tCfg.lock} ${borgCmd}";
-
-      preStop = mkIf (hasAttr path tCfg.prune) ''
-        borg prune \
-          --prefix "${cfg.prefix}${path}" \
-          ${concatStringsSep " " tCfg.prune."${path}"} \
-          ${tCfg.repo}
-      '';
+      scriptArgs = "%i";
 
       unitConfig = {
         AssertPathIsDirectory = mkIf (tCfg.lock != null) "/var/lock";
@@ -115,6 +119,22 @@ in {
         IOSchedulingPriority = 7;
         SuccessExitStatus = [1 2];
       };
-    })) (flatten (mapAttrsToList (target: tCfg: map (path: { inherit target path tCfg; }) tCfg.paths) cfg.targets)));
+    })) cfg.targets;
+
+    systemd.services = mapAttrs (target: tCfg: nameValuePair "borgbackup-prune-${target}" {
+      bindsTo = "network-online.target";
+      after = "network-online.target";
+
+      script = concatStringsSep "\n" (mapAttrsToList (''
+        borg prune \
+          --prefix "${cfg.prefix}${path}" \
+          ${concatStringsSep " " tCfg.prune."${path}"} \
+          ${tCfg.repo}
+      '') tCfg.prune);
+
+      serviceConfig = {
+        Type = "oneshot";
+      };
+    }) cfg.targets;
   };
 }
-- 
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