Question

我为我正在构建的项目设置了一系列自定义rake任务，这些项目的名称是间隔的。可以通过从控制台运行rake tasks来查看这些任务。

desc 'List all available placewise rake tasks for this application.'
task :tasks do
    result = %x[rake -T | sed -n '/placewise:/{/grep/!p;}']
    result.each_line do |task|
            puts task
    end
end

所有这些任务都存储在lib/tasks/placewise中，并按如下方式构建：

namespace :placewise do
    namespace :db do
    desc "Drop and create the current database, the argument [env] = environment."
    task :recreate, [:env] do |t,args|
            env = environments(args.env)
            msg("Dropping the #{env} database")
            shell("RAILS_ENV=#{env} rake db:drop", step: "1/3")
            msg("Creating the #{env} database")
            shell("RAILS_ENV=#{env} rake db:create", step: "2/3")
            msg("Running the #{env} database migrations")
            shell("RAILS_ENV=#{env} rake db:migrate", step: "3/3")
    end
  end
end

例如，新任务可以从基本设置开始，如下所示：

namespace :placewise do
    namespace :example do
    desc "example"
    task :example do

    end
  end
end

如您所见，每次都会复制namespace :placewise do。我想将所有自定义rake任务保留在同一个组中，但是，我很好奇是否有办法避免必须将该命名空间添加到每个.rake文件中？

干杯。

Answer 1

不幸的是，我被建议反对这个策略，并且在发现过程中我发现我的帮助方法没有正确设置。所以这里。

我在lib/modules中创建了一个新的模块文件夹，其中包含该目录中的新helper_functions.rb文件。这是我的助手：

模块HelperFunctions

    # ------------------------------------------------------------------------------------
    # Permitted environments
    # ------------------------------------------------------------------------------------
    def environments(arg)
        arg = arg || "development"
        environments = ["development", "test", "production"]
        if environments.include?(arg)
            puts
            msg("Environment parameter is valid")
            return arg
        else
            error("Invalid environment parameter")
            exit
        end
    end
    # ------------------------------------------------------------------------------------
    # Console message handler
    # ------------------------------------------------------------------------------------
    def msg(txt, periods: "yes", new_line: "yes")
        txt = txt + "..." if periods == "yes"
        puts "===> " + txt
        puts if new_line == "yes"
    end
    def error(reason)
        puts "**** ERROR! ABORTING: " + reason + "!"
    end
    # ------------------------------------------------------------------------------------
    # Execute Shell Commands
    # ------------------------------------------------------------------------------------
    def shell(cmd, step: nil)
        msg("Starting step #{step}", new_line: "no") if step.present?
        if ENV['TRY']
            puts "-->> " + cmd
        else
            sh %{#{cmd}}
        end
        msg("#{step} completed!", periods: "no")
    end
end

然后在Rakefile添加：

# Shared Ruby functions used in rake tasks
require File.expand_path('../lib/modules/helper_functions', __FILE__)
include HelperFunctions

Rails.application.load_tasks

# Do not add other tasks to this file, make files in the primary lib/tasks dir ending in .rake
# All placewise tasks should be under the lib/tasks/placewise folder and end in .rake
desc 'List all available placewise rake tasks for this application.'
task :tasks do
    result = %x[rake -T | sed -n '/placewise:/{/grep/!p;}']
    result.each_line do |task|
            puts task
    end
end

最后我的.rake任务看起来像：

namespace :placewise do
# ------------------------------------------------------------------------------------
    namespace :db do
        # ------------------------------------------------------------------------------------
    desc "Drop and create the current database, the argument [env] = environment."
    task :recreate, [:env] do |t,args|
            env = HelperFunctions::environments(args.env)
            HelperFunctions::msg("Dropping the #{env} database")
            HelperFunctions::shell("RAILS_ENV=#{env} rake db:drop", step: "1/3")
            HelperFunctions::msg("Creating the #{env} database")
            HelperFunctions::shell("RAILS_ENV=#{env} rake db:create", step: "2/3")
            HelperFunctions::msg("Running the #{env} database migrations")
            HelperFunctions::shell("RAILS_ENV=#{env} rake db:migrate", step: "3/3")
    end
        # ------------------------------------------------------------------------------------
  end
# ------------------------------------------------------------------------------------
end

rake任务使命名空间干掉命名空间

1 个答案: