Bug#1014302: os-prober: efi shell detection

[Pat Riehecky <riehecky@fnal.gov>]

Package: os-prober
Version: 1.79
Severity: wishlist
X-Debbugs-Cc: riehecky@fnal.gov

Dear Maintainer,

   * What led up to the situation?
     Some motherboards do not ship with an EFI shell within the
     firmware.  Adding a shell to the ESP can make this available, but
     it isn't currently detected by the existing scripts.

   * What exactly did you do (or not do) that was effective (or
     ineffective)?

     Add this script to all relevant arches.  Selecting the right efi
     shell binary to match the firmware is out of scope for os-prober.
     This script simply expects the admin has correctly pulled down the
     shell.efi that matches their system board.
     ```
     #!/usr/bin/sh
     # Detects a shell.efi bootloader on a EFI System Partition
     
     . /usr/share/os-prober/common.sh
     
     found=
     
     efi_shell=`find $1 -iname "shell.efi"`
     if [ -n "${efi_shell}" ]; then
	     bdir="${efi_shell%/*}"
	     bdir="${efi_shell##*/}"
	     filename=`basename ${efi_shell}`
	     long="EFI firmware management shell"
	     short="EFI_SHELL"
	     path=${bdir}/${filename}
	     found=true
     fi  
     
     if [ -n "$found" ]; then
	     label="$(count_next_label "$short")"
	     result "${path}:${long}:${label}"
     fi
     exit 0
     ```
   * What was the outcome of this action?

   The EFI shell binary is added to the detected list



-- System Information:
Debian Release: 11.3
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 5.17.12-300.fc36.x86_64 (SMP w/12 CPU threads; PREEMPT)
Kernel taint flags: TAINT_WARN
Locale: LANG=C, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /bin/dash
Init: unable to detect

Versions of packages os-prober depends on:
ii  grub-common  2.04-20
ii  libc6        2.31-13+deb11u3
ii  mount        2.36.1-8+deb11u1

os-prober recommends no packages.

os-prober suggests no packages.

-- no debconf information