ruby - 通过 capistrano 将 Rails 应用程序部署到 bluehost 时出现参数错误

Question

我已经使用rails构建了一个示例应用程序，并尝试使用capistrano将其部署到bluehost。 但我没有这样做。我按照此http://vasil-y.com/2012/08/21/rails-capistrano-git-bluehost/中提到的说明进行操作

这是我的 config/deploy.rb 的内容:

require 'bundler/capistrano'

set :application, "rails_scaffold"

# BlueHost SSH user
set :user, "username"

# App Domain
set :domain, "example.com"

# We don't need sudo on BlueHost
set :use_sudo, false

# git is our SCM
set :scm, :git

# master is our default git branch
set :branch, "master"

# Use local git repository
set :repository,  "#{domain}:/home/#{user}/rails_apps/#{application}"
set :local_repository, "."

# Checkout, compress and send a local copy
set deploy_via, :copy
set deploy_to, "/home/#{user}/rails_apps/#{application}"

# We have all components of the app on the same server
server domain, :app, :web, :db, :primary => true

namespace :deploy do
  task :start do ; end
  task :stop do ; end

  # Touch tmp/restart.txt to tell Phusion Passenger about new version
  task :restart, :roles => :app, :except => { :no_release => true } do
    run "touch #{File.join(current_path, 'tmp', 'restart.txt')}"
  end
end

# Clean-up old releases
after "deploy:restart", "deploy:cleanup" 

但是当我运行 cap deploy:setup 命令时，出现以下错误:

/home/swaroop/.rvm/gems/ruby-1.9.3-p362/gems/capistrano-2.14.2/lib/capistrano/configuration/variables.rb:22:in `set': invalid variable `/u/apps/rails_scaffold' (variables must begin with an underscore, or a lower-case letter) (ArgumentError)

它表示应用程序名称必须以下划线或小写字母开头。我的应用程序名称看起来是有效的。 我在这里做错了什么？

谢谢

Answer 1

您的几个 set 调用具有非符号的参数:

set deploy_via, :copy
set deploy_to, "/home/#{user}/rails_apps/#{application}"

那些应该是:

set :deploy_via, :copy
set :deploy_to, "/home/#{user}/rails_apps/#{application}"

(请注意 deploy_via 和 deploy_to 之前的冒号)

如果我们检查包含 :deploy_to 的行中发生的情况，您就会明白为什么它看起来可能与您的 :application 变量相关:它首先调用 deploy_to 方法(因为缺少冒号，它看起来像一个方法调用)，并且 deploy_to 默认为 "/u/apps/#{application}"在 Capistrano source code :

_cset(:deploy_to) { "/u/apps/#{application}" }

实际上，您的代码正在有效地尝试运行此:

set "/u/apps/#{application}", "/home/#{user}/rails_apps/#{application}"

但是“/u/apps/#{application}”在Capistrano中不是有效的变量名称。在这些行中添加冒号应该可以修复它。