Try additional file extensions in msys2 shell (bash/zsh currently)

path-try-additional-ext.inc.sh

path_try_additional_ext_find_names() {
	local fn="$1" result=()
	shift
	result+=("(" "-name" "$fn.$1")
	shift
	while (( $# )); do
		result+=("-o" "-name" "$fn.$1")
		shift
	done
	result+=(")")
	echo "${result[@]}"
}

path_try_additional_ext() {
	local exts=(
		"bat"
	)
	#local cmd="$(echo $PATH | tr -d '\n' | sed 's#\([a-zA-Z]\):\\#/\1/#g ; s#\\#/#g ; s/:/\x0/g' | find -files0-from - -maxdepth 1 $(path_try_additional_ext_find_names $1 "${exts[@]}") 2>/dev/null | head -n 1)"
	local cmd="$(ash -c 'echo $PATH' | tr -d '\n' | sed 's#\([a-zA-Z]\):\\#/\1/#g ; s#\\#/#g ; s/:/\x0/g' | find -files0-from - -maxdepth 1 $(path_try_additional_ext_find_names $1 "${exts[@]}") 2>/dev/null | head -n 1)"
	[[ -z "$cmd" ]] && return 127
	shift
	"$cmd" "$@"
}

if [[ -n "$BASH_VERSION" ]]; then
	if declare -f command_not_found_handle >/dev/null; then
		eval "path_try_additional_ext_bak() $(declare -f command_not_found_handle | tail -n +2)"
		command_not_found_handle() {
			path_try_additional_ext "$@"
			local ret=$?
			if [[ $ret -eq 127 ]]; then
				path_try_additional_ext_bak "$@"
				return $?
			fi
			return $ret
		}
	else
		command_not_found_handle() {
			path_try_additional_ext "$@"
			local ret=$?
			[[ $ret -eq 127 ]] && echo "$(basename $0): command not found: $1"
			return $ret
		}
	fi
elif [[ -n "$ZSH_VERSION" ]]; then
	if declare -f command_not_found_handler >/dev/null; then
		eval "path_try_additional_ext_bak() { $(declare -f command_not_found_handler | tail -n +2)"
		command_not_found_handler() {
			path_try_additional_ext "$@"
			local ret=$?
			if [[ $ret -eq 127 ]]; then
				path_try_additional_ext_bak "$@"
				return $?
			fi
			return $ret
		}
	else
		command_not_found_handler() {
			path_try_additional_ext "$@"
			local ret=$?
			[[ $ret -eq 127 ]] && echo "$(basename $0): command not found: $1"
			return $ret
		}
	fi
fi