<img src="bluefin.png" width="48" height="48">

# Auto GRUB Class Setup for Bluefin

## Introduction

GRUB themes display icons according to each entry's class. On some rpm-ostree systems, including Bluefin, new boot entries are created without a class, which means no icon is shown in the menu. 

This setup fixes that by adding a dedicated Bluefin icon to your active GRUB theme and installing a helper script that ensures every BootLoaderSpec (BLS) entry includes `grub_class bluefin`. With this in place, GRUB automatically picks up the correct icon and your Bluefin deployments appear with their own distinctive symbol in the boot menu.

(Developed and tested on `bluefin-dx:latest-42.20251012.1`)

## Acknowledgements

This setup borrows the icon for the Bluefin GRUB [theme created by Raindrac](https://github.com/Raindrac/Banner/) and is inspired by and meant as a replacement for a previous [solution by Tomasz Drozdz](https://codeberg.org/TomaszDrozdz/Fedora-Silverblue-rpm-ostree-generate-grub-theme-icon-class).

## Installation

If you don't have a GRUB theme installed, [check these out](https://www.gnome-look.org/browse?cat=109&ord=latest). I am currently using [this one](https://www.gnome-look.org/p/2227016).

### 1. Find the icons folder of your currently used GRUB theme

```bash
sudo awk -F= '/set theme=/ {f=$2; sub(/\/[^/]*$/, "", f); print f "/icons"}' /boot/grub2/user.cfg
```

should print something like `"/boot/grub2/themes/<theme>/icons`

### 2. Copy bluefin icon to that folder

```bash
sudo cp bluefin.png /boot/grub2/themes/<theme>/icons/
```

### 3. Install helper script

```bash
sudo cp bls-add-bluefin.sh /usr/local/sbin/
sudo chmod 755 /usr/local/sbin/bls-add-bluefin.sh
```

### 4. Install rpm-ostree hook

```bash
sudo mkdir -p /etc/systemd/system/ostree-finalize-staged.service.d
sudo cp bluefin-icons.conf /etc/systemd/system/ostree-finalize-staged.service.d/
```

### 5. (Optional) Test helper script

```bash
sudo /usr/local/sbin/bls-add-bluefin.sh
grep -n '^grub_class' /boot/loader/entries/ostree*.conf

# Expected Result

/boot/loader/entries/ostree-1.conf
     2:	grub_class bluefin

/boot/loader/entries/ostree-2.conf
     2:	grub_class bluefin

```