Question

我正在尝试将我的Rails应用程序部署到Heroku，按照以下说明进行测试：

http://devcenter.heroku.com/articles/rails3#prerequisites

这是我正在尝试运行的命令：

heroku create --stack cedar

我收到此错误消息：

/home/sergio/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- readline (LoadError)
    from /home/sergio/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from /home/sergio/.rvm/gems/ruby-1.9.3-p125/gems/heroku-2.20.1/lib/heroku/command/run.rb:1:in `<top (required)>'
    from /home/sergio/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from /home/sergio/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from /home/sergio/.rvm/gems/ruby-1.9.3-p125/gems/heroku-2.20.1/lib/heroku/command.rb:14:in `block in load'
    from /home/sergio/.rvm/gems/ruby-1.9.3-p125/gems/heroku-2.20.1/lib/heroku/command.rb:13:in `each'
    from /home/sergio/.rvm/gems/ruby-1.9.3-p125/gems/heroku-2.20.1/lib/heroku/command.rb:13:in `load'
    from /home/sergio/.rvm/gems/ruby-1.9.3-p125/gems/heroku-2.20.1/lib/heroku/cli.rb:8:in `start'
    from /home/sergio/.rvm/gems/ruby-1.9.3-p125/gems/heroku-2.20.1/bin/heroku:15:in `<top (required)>'
    from /home/sergio/.rvm/gems/ruby-1.9.3-p125/bin/heroku:19:in `load'
    from /home/sergio/.rvm/gems/ruby-1.9.3-p125/bin/heroku:19:in `<main>'

这是相关文件的内容：

#--
# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
# All rights reserved.
# See LICENSE.txt for permissions.
#++

module Kernel

  if defined?(gem_original_require) then
    # Ruby ships with a custom_require, override its require
    remove_method :require
  else
    ##
    # The Kernel#require from before RubyGems was loaded.

    alias gem_original_require require
    private :gem_original_require
  end

  ##
  # When RubyGems is required, Kernel#require is replaced with our own which
  # is capable of loading gems on demand.
  #
  # When you call <tt>require 'x'</tt>, this is what happens:
  # * If the file can be loaded from the existing Ruby loadpath, it
  #   is.
  # * Otherwise, installed gems are searched for a file that matches.
  #   If it's found in gem 'y', that gem is activated (added to the
  #   loadpath).
  #
  # The normal <tt>require</tt> functionality of returning false if
  # that file has already been loaded is preserved.

  def require path
    if Gem.unresolved_deps.empty? then
      gem_original_require path
    else
      spec = Gem::Specification.find { |s|
        s.activated? and s.contains_requirable_file? path
      }

      unless spec then
        found_specs = Gem::Specification.find_in_unresolved path
        unless found_specs.empty? then
          found_specs = [found_specs.last]
        else
          found_specs = Gem::Specification.find_in_unresolved_tree path
        end

        found_specs.each do |found_spec|
          found_spec.activate
        end
      end

      return gem_original_require path
    end
  rescue LoadError => load_error
    if load_error.message.end_with?(path) and Gem.try_activate(path) then
      return gem_original_require(path)
    end

    raise load_error
  end

  private :require

end

我可以使用rails -s在本地运行我的应用程序，但我似乎无法将其发布到Heroku。

Answer 1

iltempo和buru的回答帮助了我：

sudo apt-get install libreadline-dev

rvm remove 1.9.3

rvm install 1.9.3

Then add to your Gemfile:

gem 'rb-readline'

Answer 2

为我工作：

gem install rb-readline

Answer 3

这样的错误通常发生在你的rvm ruby编译时没有readline扩展时（在ruby编译之前没有安装readline头时会发生）。因此，请尝试以下操作：安装libreadline-dev，然后重新安装ruby：

rvm remove 1.9.3 
rvm install 1.9.3

Answer 4

让它对我有用！

gem 'rb-readline', "~> 0.5.0.pre.1", :require => false

Answer 5

安装ruby依赖项的最简单方法是运行：

rvm remove 1.9.3

然后

rvm install 1.9.3

在最后一个命令实际安装ruby之前，它会要求您安装依赖项。在我的情况下，我得到了这个提示：

sudo apt-get install build-essential openssl libreadline6 libreadline6-dev curl git-core zlib1g zlib1g-dev libssl-dev libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt-dev autoconf libc6-dev ncurses-dev automake libtool bison subversion pkg-config

这应该在继续安装之前在另一个终端中运行。

Answer 6

如果你碰巧在Ubuntu上使用rbenv

sudo apt-get install libreadline-dev
CONFIGURE_OPTS="--with-readline-dir=/usr/include/readline" rbenv install 1.9.3-p125

写在http://vvv.tobiassjosten.net/ruby/readline-in-ruby-with-rbenv/

Answer 7

听起来像应用程序宝石需要您的应用程序，但未在您的Gemfile中指定。请尝试添加它。

无法加载此类文件 - 运行heroku create --stack cedar时的readline（LoadError）

7 个答案: