backup script improved with multi-repo-support

backup.nix

@@ -1,8 +1,8 @@
-{config, pkgs, ... }:
+{config, pkgs, lib, ... }:
 
 # NOTE: For this to work you should use MariaDB as your Forgejo-Database running on the same host. If this is not the case, update this script accordingly.
 let
-  forgejo-borgbackup = pkgs.writeShellScriptBin "forgejo-borgbackup" ''
+  makeBackupForRepo = repo: lib.getExe (pkgs.writeShellScriptBin "forgejo-borgbackup" ''
     #!/bin/sh
     set -e
     #stop forgejo
@@ -12,7 +12,7 @@ let
     ${pkgs.mariadb}/bin/mysqldump -u root ''${MYSQL_DATABASE} > /borgbackupcache/forgejobackup.sql
     # BorgBackup
     export BORG_PASSCOMMAND="cat /etc/nixos/borgpassword"
-    export BORG_REPO=$(cat /etc/nixos/borgrepo)
+    export BORG_REPO=${repo}
     export BACKUP_NAME="forgejo-$(date +%Y-%m-%d-%H-%M)"
 
     # Add everything to be backed up
@@ -20,14 +20,21 @@ let
       $BORG_REPO::$BACKUP_NAME \
       /var/lib/forgejo/repositories/ \
       /var/lib/forgejo/data/ \
-      /borgbackupcache/forgejobackup.sql
+      /borgbackupcache/forgejobackup.sql \
+      /etc/nixos/
     # Delete DB dump
     rm /borgbackupcache/forgejobackup.sql
     # Start Forgejo again
     systemctl start forgejo.service
     # Prune old backups
     ${pkgs.borgbackup}/bin/borg prune --list $BORG_REPO --prefix 'forgejo-' --show-rc --keep-daily=7 --keep-weekly=4 --keep-monthly=6
-  '';
+  '');
+  repos = repolistfile: lib.pipe repolistfile [
+    builtins.readFile
+    (lib.splitString "\n")
+    (lib.filter (s: s != ""))
+  ];
+  backups = repolistfile: builtins.map makeBackupForRepo (repos repolistfile);
   in
   {
     environment.systemPackages = [ pkgs.borgbackup ];
@@ -39,7 +46,7 @@ let
    systemd.services.borg-backup = {
    description = "Borg Backup for Forgejo and the Forgejo MySQL Database";
    serviceConfig = {
-     ExecStart = "${forgejo-borgbackup}/bin/forgejo-borgbackup";
+     ExecStart = lib.getExe (pkgs.writeShellScriptBin "doBackups" (lib.concatStringsSep ";" (backups config._module.args.borgrepolistfile)));
      User = "root";
    };
    requires= ["mysql.service"];

configuration.nix

@@ -11,6 +11,8 @@
       # comment in backup.nix for borgbackuping forgejo 
       ./backup.nix
     ];
+  # Write path for borgbackup repos for backup.nix
+  _module.args.borgrepolistfile = ./borgrepos;
 
   # Enable Flakes and the new command-line tool
   nix.settings.experimental-features = [ "nix-command" "flakes" ];