jlobue10/rEFInd_GUI v3.4.6 on GitHub

rEFInd_GUI 3.4.6

The installer works again on Debian, Ubuntu and Linux Mint (#104, #105). The README's curl ... | sh runs the script under dash on those distros, and since 3.4.3 the checksum step used two bash-only constructs, so the install died with [[: not found / Bad substitution before the package, the sudoers rule and the menu entry were installed. Fedora and Arch were never affected because their sh is bash. The installer is now plain POSIX sh, the README says | bash, and CI lints the script as sh so this cannot come back.
Two further dash incompatibilities found while testing are fixed as well: a multi-assignment local line that only bash evaluates left to right, and a case pattern that dash never matches.

The deb, rpm and Arch packages now ship the menu entry and icon (/usr/share/applications/rEFInd_GUI.desktop, /usr/share/pixmaps/rEFInd_GUI.png), so installing a bare package by hand gets a launcher. The installer script still adds the passwordless sudoers rule that Install Config and Install Themes need; without it those two buttons cannot run, because the GUI never prompts for a password.

Re-run the installer for your platform:

curl -L https://github.com/jlobue10/rEFInd_GUI/raw/main/install-rEFInd-GUI.sh | bash

No configuration changes are needed. The GUI and its helper are updated together.