不要重複自己在Capistrano的3

Question

我當前名字空間看起來是這樣的：

namespace :deploy do 
    task :npm_install do 
    on roles :all do 
     within release_path do 
     execute :npm, :install 
     end 
    end 
    end 

    task :bower_install do 
    on roles :all do 
     within release_path do 
     execute './node_modules/.bin/bower', :install 
     end 
    end 
    end 

    task :build do 
    on roles :all do 
     within release_path do 
     invoke 'deploy:npm_install' 
     invoke 'deploy:bower_install' 
     end 
    end 
    end 

    after :finishing, :build 
end 

我不知道是否有一個另一種方式，以避免重複和roles和release_path嵌套塊。

我該如何寫得更簡潔？

Answer 1

我相信你寫它的方式是Capistrano的標準。例如，官方的Rails的任務，做同樣的方式：https://github.com/capistrano/rails/blob/master/lib/capistrano/tasks/assets.rake

namespace :assets do 
    task :precompile do 
    on release_roles(fetch(:assets_roles)) do 
     within release_path do 
     with rails_env: fetch(:rails_env) do 
      execute :rake, "assets:precompile" 
     end 
     end 
    end 
    end 

    task :backup_manifest do 
    on release_roles(fetch(:assets_roles)) do 
     within release_path do 
     # snipped… 
     end 
    end 
    end 

    task :restore_manifest do 
    on release_roles(fetch(:assets_roles)) do 
     within release_path do 
     # snipped… 
     end 
    end 
    end 
end