Get command from every flatpak app and generate wrapper script for it

flatpak-wrapper-from-commands.sh

#!/usr/bin/env bash

set -ef
if [ -z "$1" ]
then
	outdir="output"
else
	outdir="$1"
fi
mkdir -p "$outdir"
set -u

while read -r appid
do
	command="$(flatpak info -m "$appid" | awk -F= '/^command=/ { print $2; exit 0; }')"

	filename="$outdir/$command"
	newfilename="$filename"
	suffix=0

	while [ -f "${newfilename}" ]
	do
		suffix=$((suffix+1))
		newfilename="${filename}_${suffix}"
	done
	filename="$newfilename"
	unset newfilename suffix

	cat > "$filename" <<-EOF
		#!/bin/bash
		exec flatpak run --command="$command" "$appid" "\$@"
	EOF
	chmod +x "$filename"
done < <(flatpak list --app --columns=application)

exit 0