ruby-on-rails – Capistrano部署到系统范围的RVM,看不到已安装

当我运行我的Cap文件时,Cap pukes并说没有安装Ruby.

但是,实际上安装了Ruby. (部署用户是rvm组的一部分,可以手动在命令行上使用.)

我可能做错了什么？

Capfile的相关部分

$:.unshift(File.expand_path('./lib',ENV['rvm_path'])) # Add RVM's lib directory to the load path.

require "bundler/capistrano"
require "rvm/capistrano"
require "erb"

set(:rvm_type)          { :system }
set(:ruby_version)      { '1.9.2' }
set(:rvm_ruby_string)   { "#{ruby_version}@#{application}" }
set(:rvm_path)          { "/usr/local/rvm" }
#set(:rvm_bin_path)      { "#{rvm_path}/bin" }

before "deploy:setup","rvm:debug_gemset"
before "deploy:setup","bundle:install_gem"

namespace :rvm do
  desc "Creates gemset for application"
  task :debug_gemset do
    disable_rvm_shell do
      run "/usr/local/rvm/bin/rvm list rubies" do |ch,stream,data|
        if stream == :err
          logger.debug "capured output on STDERR: #{data}"
        else # stream == :out
          logger.debug "capured output on STDOUT: #{data}"
        end
      end
    end    
  end
end

# We need this so that we can install rvm first!
def disable_rvm_shell(&block)
  default_shell = self[:default_shell]
  self[:default_shell] = nil
  yield
  self[:default_shell] = default_shell
end

上限输出

* executing `deploy:setup'
  triggering before callbacks for `deploy:setup'
* executing `rvm:debug_gemset'
* executing "/usr/local/rvm/bin/rvm list rubies"  # <----- ran outside of rvm-shell
  servers: ["XX.XXX.XXX.XXX"]
Password: 
  [XX.XXX.XXX.XXX] executing command
* capured output on STDOUT:
* capured output on STDOUT: rvm rubies
* capured output on STDOUT:
* ruby-1.8.7-p352 [ x86_64 ]
* capured output on STDOUT:
* ree-1.8.7-2011.03 [ x86_64 ]
* capured output on STDOUT:
* ruby-1.9.2-p290 [ x86_64 ]
*

好的,太棒了：安装了1.9.2. (这是预期的 – 我手动安装了1.8.7,REE和1.9.2！)

但这并非所有Capistrano都说……

command finished
  * executing `bundle:install_gem'
  * executing "gem install bundler"
    servers: ["XX.XXX.XXX.XXX"]
    [XX.XXX.XXX.XXX] executing command
 ** [out ::XX.XXX.XXX.XXX] WARN: ruby ruby-1.9.2-p290 is not installed.

最后一行声称没有安装1.9.2？!!

** [out ::XX.XXX.XXX.XXX] To install do: 'rvm install ruby-1.9.2-p290'
*** [err ::XX.XXX.XXX.XXX] ERROR: Gemset 'MY_APP' does not exist,rvm gemset create 'MY_APP' first.
*** [err ::XX.XXX.XXX.XXX] Error: RVM was unable to use '1.9.2@MY_APP'
    command finished
failed: "rvm_path=/usr/local/rvm /usr/local/rvm/bin/rvm-shell '1.9.2@MY_APP' -c 'gem install bundler'" on XX.XXX.XXX.XXX

使用cap shell进行调试

Jim Gay问道,“用shell shell调试怎么样？”

rvm / capinstrano通过rvm-shell运行命令,rvm-shell在执行命令之前立即查找版本和gemset. (因此我们之前定义的disable_rvm_shell用于执行初始rvm列表rubies.

例如：

cap> which rvm
[establishing connection(s) to XX.XXX.XXX.XX]
Password: 
** [out :: XX.XXX.XXX.XX] WARN: ruby ruby-1.9.2-p290 is not installed.
** [out :: XX.XXX.XXX.XX] To install do: 'rvm install ruby-1.9.2-p290'
*** [err :: XX.XXX.XXX.XX] ERROR: Gemset 'MY_APP' does not exist,rvm gemset create 'MY_APP' first.
*** [err :: XX.XXX.XXX.XX] Error: RVM was unable to use '1.9.2@MY_APP'
error: failed: "rvm_path=/usr/local/rvm /usr/local/rvm/bin/rvm-shell '1.9.2@MY_APP' -c 'which rvm'" on XX.XXX.XXX.XX

结论

我显然做错了什么,但是什么？

将1.9.2设置为默认的Ruby不是一个选项,因为我还将在此框中托管1.8.7应用程序(理想情况下).这就是为什么我在系统级别使用RVM开始).

根据RVM文档,我还确保部署用户位于RVM组中.