From 855cdfa312ad3bce7604d1ecd8a9eff7aceb1eee Mon Sep 17 00:00:00 2001
From: Aly Raffauf <alyraffauf@gmail.com>
Date: Tue, 2 Apr 2024 10:31:45 -0400
Subject: [PATCH] rustboro: delete old roots after 5 days

---
 hosts/rustboro/default.nix | 40 ++++++++++++++------------------------
 1 file changed, 15 insertions(+), 25 deletions(-)

diff --git a/hosts/rustboro/default.nix b/hosts/rustboro/default.nix
index c31d945f..d9468935 100644
--- a/hosts/rustboro/default.nix
+++ b/hosts/rustboro/default.nix
@@ -14,37 +14,27 @@
     loader.systemd-boot.enable = true;
     loader.efi.canTouchEfiVariables = true;
 
-    # initrd.postDeviceCommands = lib.mkAfter ''
-    #   mkdir /btrfs_tmp
-    #   mount /dev/sda2 /btrfs_tmp
-    #   if [[ -e /btrfs_tmp/rootfs ]]; then
-    #       mkdir -p /btrfs_tmp/old_roots
-    #       timestamp=$(date --date="@$(stat -c %Y /btrfs_tmp/rootfs)" "+%Y-%m-%-d_%H:%M:%S")
-    #       mv /btrfs_tmp/rootfs "/btrfs_tmp/old_roots/$timestamp"
-    #   fi
-
-    #   delete_subvolume_recursively() {
-    #       IFS=$'\n'
-    #       for i in $(btrfs subvolume list -o "$1" | cut -f 9- -d ' '); do
-    #           delete_subvolume_recursively "/btrfs_tmp/$i"
-    #       done
-    #       btrfs subvolume delete "$1"
-    #   }
-
-    #   for i in $(find /btrfs_tmp/old_roots/ -maxdepth 1 -mtime +10); do
-    #       delete_subvolume_recursively "$i"
-    #   done
-
-    #   btrfs subvolume create /btrfs_tmp/rootfs
-    #   umount /btrfs_tmp
-    # '';
     initrd.postDeviceCommands = lib.mkAfter ''
       mkdir /btrfs_tmp
       mount /dev/sda2 /btrfs_tmp
       if [[ -e /btrfs_tmp/rootfs ]]; then
-          btrfs subvolume delete /btrfs_tmp/rootfs
+          mkdir -p /btrfs_tmp/old_roots
+          timestamp=$(date --date="@$(stat -c %Y /btrfs_tmp/rootfs)" "+%Y-%m-%-d_%H:%M:%S")
+          mv /btrfs_tmp/rootfs "/btrfs_tmp/old_roots/$timestamp"
       fi
 
+      delete_subvolume_recursively() {
+          IFS=$'\n'
+          for i in $(btrfs subvolume list -o "$1" | cut -f 9- -d ' '); do
+              delete_subvolume_recursively "/btrfs_tmp/$i"
+          done
+          btrfs subvolume delete "$1"
+      }
+
+      for i in $(find /btrfs_tmp/old_roots/ -maxdepth 1 -mtime +5); do
+          delete_subvolume_recursively "$i"
+      done
+
       btrfs subvolume create /btrfs_tmp/rootfs
       umount /btrfs_tmp
     '';