使用 Capistrano 部署时出现 psych.rb 错误“在此上下文中不允许映射”答案

【问题标题】：psych.rb error when deploying with Capistrano 'mapping not allowed in this context'使用 Capistrano 部署时出现 psych.rb 错误“在此上下文中不允许映射”
【发布时间】：2013-03-31 17:00:52
【问题描述】：

我正在尝试将 Rails 应用程序部署到 CentOS 6/nginx/passenger 服务器，但 cap deploy:cold 给了我一个错误。这是部署输出的相关部分：

  * 2013-03-31 17:49:59 executing `deploy:assets:update_asset_mtimes'
  * executing "[ -e /home/appuser/apps/britaincares/shared/assets/manifest.yml ] && cat /home/appuser/apps/britaincares/shared/assets/manifest.yml || echo"
    servers: ["www.britaincares.co.uk"]
    [www.britaincares.co.uk] executing command
    command finished in 303ms
*** [deploy:update_code] rolling back
  * executing "rm -rf /home/appuser/apps/britaincares/releases/20130331164733; true"
    servers: ["www.britaincares.co.uk"]
    [www.britaincares.co.uk] executing command
 ** [out :: www.britaincares.co.uk] /home/appuser/.bashrc: eval: line 26: syntax error: unexpected end of file
    command finished in 932ms
/Users/chriswickett/.rvm/rubies/ruby-1.9.3-p374/lib/ruby/1.9.1/psych.rb:203:in `parse': (<unknown>): mapping values are not allowed in this context at line 1 column 28 (Psych::SyntaxError)
    from /Users/chriswickett/.rvm/rubies/ruby-1.9.3-p374/lib/ruby/1.9.1/psych.rb:203:in `parse_stream'
    from /Users/chriswickett/.rvm/rubies/ruby-1.9.3-p374/lib/ruby/1.9.1/psych.rb:151:in `parse'
    from /Users/chriswickett/.rvm/rubies/ruby-1.9.3-p374/lib/ruby/1.9.1/psych.rb:127:in `load'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/recipes/deploy/assets.rb:63:in `block (3 levels) in load'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:138:in `instance_eval'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:138:in `invoke_task_directly'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:25:in `invoke_task_directly_with_callbacks'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:89:in `execute_task'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:101:in `find_and_execute_task'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/callback.rb:38:in `call'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:141:in `block in trigger'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:141:in `each'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:141:in `trigger'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:23:in `invoke_task_directly_with_callbacks'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:89:in `execute_task'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:101:in `find_and_execute_task'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/callback.rb:38:in `call'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:141:in `block in trigger'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:141:in `each'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:141:in `trigger'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:27:in `invoke_task_directly_with_callbacks'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:89:in `execute_task'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/namespaces.rb:191:in `method_missing'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/namespaces.rb:110:in `block in define_task'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/recipes/deploy.rb:229:in `block (3 levels) in load'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:56:in `transaction'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/namespaces.rb:191:in `method_missing'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/recipes/deploy.rb:228:in `block (2 levels) in load'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:138:in `instance_eval'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:138:in `invoke_task_directly'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:25:in `invoke_task_directly_with_callbacks'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:89:in `execute_task'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/namespaces.rb:191:in `method_missing'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/namespaces.rb:110:in `block in define_task'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/recipes/deploy.rb:517:in `block (2 levels) in load'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:138:in `instance_eval'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:138:in `invoke_task_directly'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:25:in `invoke_task_directly_with_callbacks'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:89:in `execute_task'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:101:in `find_and_execute_task'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/cli/execute.rb:46:in `block in execute_requested_actions'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/cli/execute.rb:45:in `each'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/cli/execute.rb:45:in `execute_requested_actions'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/cli/help.rb:19:in `execute_requested_actions_with_help'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/cli/execute.rb:34:in `execute!'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/cli/execute.rb:14:in `execute'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/bin/cap:4:in `<top (required)>'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/bin/cap:19:in `load'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374

导轨 3.2.1。

提到的 manifest.yml 文件包含“jquery.min.map” - 这就是“不允许映射”部分所指的内容吗？如果是这样，我不知道如何阻止 jQuery 尝试包含此地图文件。

我已经尝试通过各种在线验证器将 manifest.yml 文件的上下文放入 - 效果很好。据我所知，没有缺少空格或制表符。

谢谢！

【问题讨论】：

标签： ruby-on-rails capistrano

【解决方案1】：

我遇到了这个问题，并按照here 的建议删除了myapp/shared/assets 下的.json 清单文件（实际上，他们建议重命名它们，但这对我不起作用）。

【讨论】：

这对我有用。但我实际上删除了manifest.yml 文件。 Rails 4 现在使用 .json，在文件名中包含一个 bust-string。
当您有两个清单文件时会发生此问题，无论是一个 .yml 和一个 .json 还是两个 .json 文件。我在使用 capistrano-local-precompile 后发现了这一点，它没有删除以前的资产文件并阻止我部署，直到我删除了旧的 manifest-.json 文件

【解决方案2】：

我解决了这个问题。之所以调用 Psych，是因为 Capistrano 的 deploy/assets.rb 中的文件使用了 YAML.load。

它正在加载的变量是命令行 cat 命令的“捕获”，并且因为我的 .bashrc 中有语法错误，它正在捕获该错误的输出并将其传递给 YAML.load .修复了.bashrc 错误，一切正常！

【讨论】：