如何从根目录之外安装配置文件？

当我从我的应用程序目录中rackup运行，它工作得很好：如何从根目录之外安装配置文件？

[email protected]:~/discourse$ rackup config.ru 
Flushing redis (development mode) 
/home/walkraft/.rvm/gems/ruby-1.9.3-p374/gems/activesupport-3.2.11/lib/active_support/dependencies.rb:251:in `block in require': iconv will be deprecated in the future, use String#encode instead. 
/home/walkraft/discourse/vendor/gems/message_bus/lib/message_bus.rb:130: warning: already initialized constant ENCODE_SITE_TOKEN 
>> Thin web server (v1.5.0 codename Knife) 
>> Maximum connections set to 1024 
>> Listening on 0.0.0.0:9292, CTRL+C to stop

不过，如果我尝试从这个目录之外运行rackup：

[email protected]:~$ rackup discourse/config.ru 
/home/walkraft/discourse/config/application.rb:7:in `require': cannot load such file -- ./lib/discourse_plugin_registry (LoadError) 
     from /home/walkraft/discourse/config/application.rb:7:in `<top (required)>' 
     from /home/walkraft/.rvm/rubies/ruby-1.9.3-p374/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require' 
     from /home/walkraft/.rvm/rubies/ruby-1.9.3-p374/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require' 
     from /home/walkraft/discourse/config/environment.rb:2:in `<top (required)>' 
     from /home/walkraft/.rvm/rubies/ruby-1.9.3-p374/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require' 
     from /home/walkraft/.rvm/rubies/ruby-1.9.3-p374/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require' 
     from /home/walkraft/discourse/config.ru:2:in `block in <main>' 
     from /home/walkraft/.rvm/gems/ruby-1.9.3-p374/gems/rack-1.4.4/lib/rack/builder.rb:51:in `instance_eval' 
     from /home/walkraft/.rvm/gems/ruby-1.9.3-p374/gems/rack-1.4.4/lib/rack/builder.rb:51:in `initialize' 
     from /home/walkraft/discourse/config.ru:in `new' 
     from /home/walkraft/discourse/config.ru:in `<main>' 
     from /home/walkraft/.rvm/gems/ruby-1.9.3-p374/gems/rack-1.4.4/lib/rack/builder.rb:40:in `eval' 
     from /home/walkraft/.rvm/gems/ruby-1.9.3-p374/gems/rack-1.4.4/lib/rack/builder.rb:40:in `parse_file' 
     from /home/walkraft/.rvm/gems/ruby-1.9.3-p374/gems/rack-1.4.4/lib/rack/server.rb:200:in `app' 
     from /home/walkraft/.rvm/gems/ruby-1.9.3-p374/gems/rack-1.4.4/lib/rack/server.rb:304:in `wrapped_app' 
     from /home/walkraft/.rvm/gems/ruby-1.9.3-p374/gems/rack-1.4.4/lib/rack/server.rb:254:in `start' 
     from /home/walkraft/.rvm/gems/ruby-1.9.3-p374/gems/rack-1.4.4/lib/rack/server.rb:137:in `start' 
     from /home/walkraft/.rvm/gems/ruby-1.9.3-p374/gems/rack-1.4.4/bin/rackup:4:in `<top (required)>' 
     from /home/walkraft/.rvm/gems/ruby-1.9.3-p374/bin/rackup:19:in `load' 
     from /home/walkraft/.rvm/gems/ruby-1.9.3-p374/bin/rackup:19:in `<main>' 
     from /home/walkraft/.rvm/gems/ruby-1.9.3-p374/bin/ruby_noexec_wrapper:14:in `eval' 
     from /home/walkraft/.rvm/gems/ruby-1.9.3-p374/bin/ruby_noexec_wrapper:14:in `<main>'

如何运行rackup当我m不在根目录内？

来源

2013-02-12 Casebash

你可以'cd到该目录并运行'rackup' – 2013-02-12 12:48:35

@SergioTulentsev：当然他们有一些选择，所以你不这样做？ – Casebash 2013-02-12 12:54:58

那么，相对于当前目录而言，你还能成功执行文件查找吗？为什么你不能'cd'，你能否详细说明一下？ – 2013-02-12 12:57:38

其实，这不是rackup问题;这是你的代码有问题。

你有

require './lib/discourse_plugin_registry'

地方。这并不理想。它应该是这样的：

require File.expand_path('../../lib/discourse_plugin_registry', __FILE__)

你有它的方式，它采用了当前目录明确，无论你做什么rackup，直到你改变当前目录 - 它不会工作。

来源

2013-02-12 13:44:52 Incidently

如果不想手动cd的话语根文件夹，那么为什么不只是增加一个固定的rackup config.ru文件：

# Insert as first line in config.ru 
Dir.chdir(File.dirname(File.expand_path(__FILE__)))

来源

2013-02-12 13:33:42 Casper

如何从根目录之外安装配置文件？

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