不知道如何建立任务 - 为调用其他任务

Question

我有一个名为setup_a_new_set_of_snippets rake任务父任务，看起来像这样：我调用它像这样

load './lib/tasks/fetch_and_create_snippets.rake' 
load './lib/tasks/generate_diffs_for_snippets.rake' 
load './lib/tasks/cleanup_snippets_with_empty_diffs.rake' 

desc "Setup a new set of Snippets" 
task :setup_a_new_set_of_snippets, [:repo, :path, :entry_id, :framework_id, :method_name] => :environment do |task, args| 
    repo = args[:repo] 
    path = args[:path] 
    entry_id = args[:entry_id] 
    framework_id = args[:framework_id] 
    method_name = args[:method_name] 
    Rake::Task["fetch_and_create_snippets[#{repo},#{path},#{entry_id},#{framework_id},#{method_name}]"].invoke 
    Rake::Task["generate_diffs_for_snippets"].invoke 
    Rake::Task["cleanup_snippets_with_empty_diffs"].invoke 
end 

：

$ rake setup_a_new_set_of_snippets["some/repo","some/viable/path",1,1,has_many] 
** Invoke setup_a_new_set_of_snippets (first_time) 
** Invoke environment (first_time) 
** Execute environment 
** Execute setup_a_new_set_of_snippets 
rake aborted! 
Don't know how to build task 'fetch_and_create_snippets[some/repo,some/viable/path,1,1,has_many]' (see --tasks) 
/lib/tasks/setup_new_snippet_set.rake:12:in `block in <top (required)>' 
/gems/rake-11.2.2/exe/rake:27:in `<top (required)>' 
/bin/ruby_executable_hooks:15:in `eval' 
/bin/ruby_executable_hooks:15:in `<main>' 
Tasks: TOP => setup_a_new_set_of_snippets 
(See full trace by running task with --trace) 

这是它被挂在任务：

desc 'Fetch and Create Snippets from Github' 

task :fetch_and_create_snippets, [:repo, :path, :entry_id, :framework_id, :method_name] => :environment do |task, args| 
    # truncated for brevity 
end 

FWIW，当我运行fetch_and_create_snippets个任务本身......它像一个魅力。

这可能是什么原因造成的？

Answer 1

您没有正确地将参数传递给rake任务。见How to pass command line arguments to a rake task

具体来说，就在这里：

Rake::Task["fetch_and_create_snippets[#{repo},#{path},#{entry_id},#{framework_id},#{method_name}]"].invoke 

它看起来像你正在使用的语法Rake.application.invoke_task而对于Rake::Task[name].invoke正确的语法是：

Rake::Task["fetch_and_create_snippets"].invoke(repo, path, entry_id, framework_id, method_name) 

Answer 2

来传递参数的语法到耙子任务是：

Rake::Task['fetch_and_create_snippets'].invoke(
    repo, path, entry_id, framework_id, method_name 
)