Usage Message

Show a usage status when the command is missing.

usage_message.lua

local command = 
local status = "usage"
local message = "usage: tool <command>"
if command ~= "" then
  status = "ready"
  message = "execute:" .. command
end
print("status=" .. status)
print("message=" .. message)

local command = 
local status = "usage"
local message = "usage: tool <command>"
if command ~= "" then
  status = "ready"
  message = "execute:" .. command
end
print("status=" .. status)
print("message=" .. message)

local command = 
local status = "usage"
local message = "usage: tool <command>"
if command ~= "" then
  status = "ready"
  message = "execute:" .. command
end
print("status=" .. status)
print("message=" .. message)

usage message Command-line programs usually show usage text when required arguments are missing.