Added a script that backups obsidian notes

modules/scripts/obsidianbackup.nix

@@ -0,0 +1,64 @@
+{
+  writeShellApplication,
+  rclone,
+  libnotify,
+  rsync,
+  ...
+}:
+
+writeShellApplication {
+  name = "custom-obsidianbackup";
+  runtimeInputs = [
+    rclone
+    libnotify
+    rsync
+  ];
+  text = ''
+    #!/usr/bin/env bash
+
+    SOURCE_DIR="$HOME/Documents/Notes"
+    DEST_DIR="$HOME/kdrive/Notes"
+    BACKUP_DIR="$HOME/.Notes.backup"
+
+    mkdir -p "$DEST_DIR"
+    mkdir -p "$BACKUP_DIR"
+
+    while true; do
+      # Timestamp for this run
+      TIMESTAMP=$(date +%Y-%m-%d_%H-%M)
+      TIMESTAMPED_BACKUP="$BACKUP_DIR/$TIMESTAMP"
+      mkdir -p "$TIMESTAMPED_BACKUP"
+
+      echo "[$(date)] Starting Obsidian backup..."
+
+      # Check rclone mount
+      status=$(rclone about kdrive: 2>&1 || true)
+      if [[ "$status" =~ .*CRITICAL.* ]]; then
+        echo "[$(date)] rclone failed:"
+        echo "$status"
+        notify-send -u critical "rclone failed" \
+          "rclone might be broken or you need to deactivate this script in HomeManager."
+      else
+        # Run rsync with verbose debugging
+        echo "[$(date)] Running rsync..."
+        rsync -Lavh --progress --update --backup --backup-dir="$TIMESTAMPED_BACKUP" \
+          --exclude='.obsidian/cache/**' \
+          "$SOURCE_DIR/" "$DEST_DIR/"
+
+        echo "[$(date)] Backup completed for this run."
+      fi
+
+      # Safely remove backups older than 30 days
+      if [[ -d "$BACKUP_DIR" && "$BACKUP_DIR" == "$HOME/.Notes.backup" ]]; then
+        echo "[$(date)] Cleaning old backups..."
+        find "$BACKUP_DIR/" -mindepth 1 -maxdepth 1 -type d -mtime +30 -exec rm -rf {} \;
+      else
+        echo "[$(date)] Backup directory not safe. Skipping cleanup."
+      fi
+
+      # Wait 1 hour
+      echo "[$(date)] Sleeping for 1 hour..."
+      sleep 3600
+    done
+  '';
+}