backup.nix

@@ -11,7 +11,30 @@ let
     runtimeInputs = [
       pkgs.restic
     ];
-    text = (builtins.readFile ./backup.sh);
+    text = ''
+      if [ -z "$BACKUP_HELPER_DIRS"  ]; then
+        echo "BACKUP_HELPER_DIRS is not set"
+        exit 1;
+      fi
+      exit_code=0;
+      for i in ''${BACKUP_HELPER_DIRS//,/ }; do
+        echo "Starting backup of $i";
+        if ! output=$(restic backup "$i"); then
+          exit_code=1;
+          echo "Backup of $i failed with exit code $?:"
+          echo "$output"
+        else
+          echo "Backup of $i successful:"
+          echo "$output"
+        fi
+      done
+      if [ "$BACKUP_FORGET" -eq 1 ]; then
+        echo "Removing old backups"
+        output=$(restic forget -d 7 -w 4 -m 6 --keep-within 1d --prune)
+        echo "$output"
+      fi
+      exit "$exit_code";
+    '';
   };
 in
 {
@@ -27,11 +50,6 @@ in
       default = [ ];
       description = "Directories to be backed up.";
     };
-    backup-commands = lib.mkOption {
-      type = lib.types.listOf lib.types.str;
-      default = [ ];
-      description = "Backup the stdout of commands. Format strings like key:command";
-    };
     schedule = lib.mkOption {
       type = lib.types.str;
       default = "*-*-* 00:00:00";
@@ -65,9 +83,6 @@ in
         }
         // lib.attrsets.optionalAttrs (builtins.hasAttr "password-file" cfg) {
           RESTIC_PASSWORD_FILE = cfg.password-file;
-        }
-        // lib.attrsets.optionalAttrs (cfg.backup-commands != [ ]) {
-          BACKUP_HELPER_COMMANDS = lib.strings.concatStringsSep ";" cfg.backup-commands;
         };
       serviceConfig = {
         Type = "oneshot";

backup.sh

@@ -1,49 +0,0 @@
-#!/usr/bin/env bash
-
-# If neither of BACKUP_HELPER_DIRS and BACKUP_HELPER_COMMANDS not set. Exit
-if [ -z "$BACKUP_HELPER_DIRS" ] && [ -z "$BACKUP_HELPER_COMMANDS" ]; then
-  echo "BACKUP_HELPER_DIRS is not set"
-  exit 1;
-fi
-exit_code=0;
-
-# Backup directories
-if [ -n "$BACKUP_HELPER_DIRS" ]; then
-  for i in ${BACKUP_HELPER_DIRS//,/ }; do
-    echo "Starting backup of $i";
-    if ! output=$(restic backup "$i"); then
-      exit_code=1;
-      echo "Backup of $i failed with exit code $?:"
-      echo "$output"
-    else
-      echo "Backup of $i successful:"
-      echo "$output"
-    fi
-  done
-fi
-
-# Backup command outputs
-if [ -n "$BACKUP_HELPER_COMMANDS" ]; then
-  IFS=";" read -r -a pairs <<< "$BACKUP_HELPER_COMMANDS"
-
-  for pair in "${pairs[@]}"; do
-      IFS=":" read -r key value <<< "$pair"
-
-      if ! output=$(restic backup --stdin-filename "$key" --stdin-from-command -- "$value"); then
-        exit_code=1;
-        echo "Backup of $i failed with exit code $?:"
-        echo "$output"
-      else
-        echo "Backup of $i successful:"
-        echo "$output"
-      fi
-        
-  done
-fi
-
-if [ "$BACKUP_FORGET" -eq 1 ]; then
-  echo "Removing old backups"
-  output=$(restic forget -d 7 -w 4 -m 6 --keep-within 1d --prune)
-  echo "$output"
-fi
-exit "$exit_code"

flake.nix

@@ -3,8 +3,7 @@
 
   inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
 
-  outputs =
-    { self, nixpkgs }:
+  outputs = { self, nixpkgs }:
     let
       allSystems = [
         "x86_64-linux"
@@ -12,31 +11,24 @@
         "x86_64-darwin"
         "aarch64-darwin"
       ];
-      forAllSystems =
-        f:
-        nixpkgs.lib.genAttrs allSystems (
-          system:
-          f {
-            pkgs = import nixpkgs { inherit system; };
-          }
-        );
+      forAllSystems = f: nixpkgs.lib.genAttrs allSystems (system: f {
+        pkgs = import nixpkgs { inherit system; };
+      });
     in
     {
       nixosModules.backup-helper = import ./backup.nix;
       nixosModules.default = self.nixosModules.backup-helper;
 
-      devShells = forAllSystems (
-        { pkgs }:
-        {
-          default = pkgs.mkShell {
-            packages = with pkgs; [
+      devShells = forAllSystems ({ pkgs }: {
+        default = pkgs.mkShell {
+          packages = with pkgs;
+            [
               restic
               bash
               jq
               curl
             ];
-          };
-        }
-      );
+        };
+      });
     };
 }