chmod a+x /path/to/file.appimage

#!/bin/bash

# create target directory
mkdir -p /var/lib/swcatalog/yaml/
cd /var/lib/swcatalog/yaml/

# download components
for suite in excalibur excalibur-updates excalibur-backports; do
  debsuite=$(echo $suite|sed -e 's/excalibur/trixie/g')
  for component in main contrib non-free non-free-firmware; do
    echo "Downloading: component: ${suite}-${component}..."
    wget -q https://appstream.debian.org/data/${debsuite}/${component}/Components-amd64.yml.gz -O devuan-${suite}-${component}_amd64.yml.gz
  done
done

echo "Patching component: excalibur-main_amd64 ..."
gunzip devuan-excalibur-main_amd64.yml.gz
lstart=$(grep -n ^Type:\ operating-system devuan-excalibur-main_amd64.yml | cut -d : -f 1)
lcount=$(tail -n +${lstart} devuan-excalibur-main_amd64.yml | grep -n ^---$ | head -n 1 | cut -d : -f 1)
lresume=$((lstart + lcount))
head -n ${lstart} devuan-excalibur-main_amd64.yml > devuan-excalibur-main_amd64.tmp
cat <<HERE >>devuan-excalibur-main_amd64.tmp
ID: org.devuan.devuan
Name:
  C: Devuan GNU/Linux
Summary:
  C: The universal operating system
Description:
  C: >-
    <p>
      Devuan is a free operating system (OS) for your computer.
      An operating system is the set of basic programs and utilities that make your computer run.
    </p>
    <p>
      Devuan is based on the Debian project, but with a focus on init freedom.
    </p>
Developer:
  id: org.devuan
  name:
    C: The Devuan Project
Url:
  homepage: https://www.devuan.org/
Icon:
  cached:
  - name: devuan-logo.png
    width: 48
    height: 48
  - name: devuan-logo.png
    width: 64
    height: 64
  - name: devuan-logo.png
    width: 128
    height: 128
Releases:
- version: "7"
  type: development
  description:
    C: >-
      <p>The current development version of Devuan, codename freia.</p>
- version: "6"
  type: stable
  description:
    C: >-
      <p>The current stable version of Devuan, codename excalibur.</p>
- version: "5"
  type: oldstable
  description:
    C: >-
      <p>The oldstable version of Devuan, codename daedalus.</p>
- version: "4"
  type: oldoldstable
  description:
    C: >-
      <p>The oldoldstable version of Devuan, codename chimaera.</p>
---
HERE
tail -n +${lresume} devuan-excalibur-main_amd64.yml >> devuan-excalibur-main_amd64.tmp
mv devuan-excalibur-main_amd64.yml devuan-excalibur-main_amd64.yml~
mv devuan-excalibur-main_amd64.tmp devuan-excalibur-main_amd64.yml
gzip -f devuan-excalibur-main_amd64.yml

# download icons
for suite in excalibur excalibur-updates excalibur-backports; do
  debsuite=$(echo $suite|sed -e 's/excalibur/trixie/g')
  for component in main contrib non-free non-free-firmware; do
    for size in 48x48 64x64 128x128; do
      echo "Downloading ${size} icons for ${suite}-${component}..."
      mkdir -p /var/lib/swcatalog/icons/debian-${debsuite}-${component}/${size}
      cd /var/lib/swcatalog/icons/debian-${debsuite}-${component}/${size}
      wget -q https://appstream.debian.org/data/${debsuite}/${component}/icons-${size}.tar.gz
      tar xf icons-${size}.tar.gz
      mkdir -p /var/lib/swcatalog/icons/debian-${debsuite}-${component}/${size}@2
      cd /var/lib/swcatalog/icons/debian-${debsuite}-${component}/${size}@2
      wget -q https://appstream.debian.org/data/${debsuite}/${component}/icons-${size}@2.tar.gz
      tar xf icons-${size}@2.tar.gz
    done
  done
done

backend = "xrender";
vsync = "opengl-svc";
paint-on-overlay = true;

startpar: service(s) refused failure: x11-common ... failed! # no longer displays as a result of installing x11-common

[E][17:29:29.641816] pw.core      | [          core.c:  389 core_new()] 0x5633fd18a6e0: can't find protocol 'PipeWire:Protocol:Native': Operation not supported
[E][17:29:29.641858] mod.filter-chain | [module-filter-ch: 2096 pipewire__module_init()] can't connect: Operation not supported
[E][17:29:29.642273] pw.core      | [          core.c:  389 core_new()] 0x5633fd18a6e0: can't find protocol 'PipeWire:Protocol:Native': Operation not supported