Rake -T 无法识别任务

Question

我正在尝试设置一个 Rake 任务（没有 Rails），从而创建了一个演示 Hello World 任务。但是，运行

rake -T

或

rake --tasks

时不会返回任何内容，就好像任务尚未识别一样。我在这里做错了什么？

另外，当我运行

rake hello_world

时，我收到以下错误：

➜  ~/GitHub/Cerner/test git:(master) ✗ rake hello_world
rake aborted!
Don't know how to build task 'hello_world' (See the list of available tasks with `rake --tasks`)
/usr/share/rvm/gems/ruby-2.6.6/gems/rake-13.0.6/exe/rake:27:in `<top (required)>'
/home/hsbagga28/gems/bin/ruby_executable_hooks:22:in `eval'
/home/hsbagga28/gems/bin/ruby_executable_hooks:22:in `<main>'
(See full trace by running task with --trace)

[更新] rakefile：

# frozen_string_literal: true

# Add your own tasks in files placed in lib/tasks ending in .rake,
# for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
$LOAD_PATH.push File.expand_path('lib', __dir__)

Answer 1

我最终创建了一个默认的 Rakefile：

# Add your own tasks in files placed in lib/tasks ending in .rake,
# for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.

require_relative "config/application"

Rails.application.load_tasks

此后

rake -T

似乎返回了我在

lib/tasks

下定义的任务