引用 windows 路径字符串中的属性

Question

我在 chef 中执行了以下命令：

#execute
execute 'service-api install' do
  command 'c:\buildinfo\service-api\api\approot\web-#{node['default']['env']}.cmd'
end

its 运行ning in windows and #{node['default']['env']} 是我试图在路径字符串中引用的属性多于。

当我运行时，出现以下错误：

> SyntaxError
> ==> default: -----------
> ==> default: C:\vagrant-chef9622f1791bb50a8f9441fd4c1ff806\cookbooks\djcm_paypal_win\recipes\installService.rb:76:
> syntax error, unexpected tIDENTIFIER, expecting keyword_end
> ==> default: ...api\approot\web-#{node['default']['env']}.cmd'

如果我尝试：

 #execute
    execute 'service-api install' do
      command "c:\buildinfo\service-api\api\approot\web-#{node['default']['env']}.cmd"
    end

斜线以不同的颜色显示（转义字符？）并且出现以下错误：

[execute] The filename, directory name, or volume label syntax is incorrect.
 command "c:\buildinfo ervice-api\api\approotweb-integration.cmd"

所以它在斜杠周围弄乱了但得到了属性。如何在带斜杠的字符串中指定属性？

编辑 1：我尝试了双斜杠和其他解决方案，即使它现在试图找到正确的路径但仍然会失败，即使文件存在于那个确切的位置并且我可以手动运行它。有什么想法吗？

现在的错误：

* execute[service-api install] action run
==> default:     [execute] The system cannot find the path specified.
==> default:     
==> default: 
==> default:     ================================================================================
==> default:     Error executing action `run` on resource 'execute[service-api install]'
==> default:     ================================================================================
==> default:     
==> default:     Mixlib::ShellOut::ShellCommandFailed
==> default:     ------------------------------------
==> default:     Expected process to exit with [0], but received '1'
==> default:     ---- Begin output of c:\buildinfo\service-api\api\approot\web-integration.cmd ----
==> default:     STDOUT: 
==> default:     STDERR: The system cannot find the path specified.
==> default:     ---- End output of c:\buildinfo\service-api\api\approot\web-integration.cmd ----
==> default:     Ran c:\buildinfo\service-api\api\approot\web-integration.cmd returned 1

Answer 1

使用单引号将不允许插值。使用双引号会使反斜杠有特殊意义，所以\b means "backspace".

您可以妥协，使用 % 运算符添加内容 printf-style:

command('c:\buildinfo\service-api\api\approot\web-%s.cmd' % node['default']['env'])

引用 windows 路径字符串中的属性

referencing an attribute in a windows path string

ruby

ruby-on-rails

chef-infra

ruby-on-rails-3

chef-recipe