安装 bcrypt (3.1.11) 时出错，Bundler 无法继续。答案

【问题标题】：An error occurred while installing bcrypt (3.1.11), and Bundler cannot continue.安装 bcrypt (3.1.11) 时出错，Bundler 无法继续。
【发布时间】：2016-05-11 09:34:15
【问题描述】：

我尝试使用 capistrano 部署我的项目，但没有成功。

错误说，

 An error occurred while installing bcrypt (3.1.11), and Bundler cannot
 continue. Make sure that `gem install bcrypt -v '3.1.11'` succeeds
 before bundling.

这是我的错误。

INFO [c11e0369] Running $HOME/.rbenv/bin/rbenv exec bundle install --path /var/www/peace/shared/bundle --without development test --deployment --quiet as ec2-user@52.193.101.5
DEBUG [c11e0369] Command: cd /var/www/peace/releases/20160511092524 && ( export RBENV_ROOT="$HOME/.rbenv" RBENV_VERSION="2.1.7" ; $HOME/.rbenv/bin/rbenv exec bundle install --path /var/www/peace/shared/bundle --without development test --deployment --quiet )
DEBUG [c11e0369]    An error occurred while installing bcrypt (3.1.11), and Bundler cannot continue.
Make sure that `gem install bcrypt -v '3.1.11'` succeeds before bundling.
(Backtrace restricted to imported tasks)
cap aborted!
SSHKit::Runner::ExecuteError: Exception while executing as ec2-user@52.193.101.5: bundle exit status: 5
bundle stdout: An error occurred while installing bcrypt (3.1.11), and Bundler cannot continue.
Make sure that `gem install bcrypt -v '3.1.11'` succeeds before bundling.
bundle stderr: Nothing written

我的 gem 文件中没有 bcript。这是我的 Gem 文件

source 'https://rubygems.org'


# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '4.2.0'
# Use sqlite3 as the database for Active Record
group :development, :test do
  gem 'sqlite3'
end



group :production do
  gem 'mysql2', '~> 0.3.20'
end

# Use SCSS for stylesheets
gem 'bootstrap-datetimepicker-rails'
gem 'bootstrap-timepicker-rails'
gem 'awesome_nested_fields'
gem 'sass-rails', '~> 5.0'
gem 'kaminari'
gem 'whenever', require: false
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.1.0'
gem 'google-analytics-rails'
gem 'sitemap_generator'
gem 'rails-i18n'
# See https://github.com/sstephenson/execjs#readme for more supported runtimes
#gem 'therubyracer', platforms: :ruby
gem 'rails_admin'
gem 'rails_admin_tag_list'#, :git => 'git://github.com/imouaddine/rails_admin_tag_list.git', :ref => 'a9a4e31af6fdd2124110d0dff81ab97950803e65'
gem 'devise'
gem 'omniauth-twitter'
gem 'omniauth-facebook'
gem 'font-awesome-rails'
gem 'jqplot-rails'
gem 'ransack'
gem 'mail_form'
gem 'simple_form'
gem 'redis', '3.2.2'
gem 'streamio-ffmpeg'


group :production, :staging do

    gem 'unicorn'

end

group :development do
  gem 'capistrano', '~> 3.4.0'
  gem 'capistrano-rails',   '~> 1.1', require: false
  gem 'capistrano-bundler', '~> 1.1', require: false
  gem 'capistrano-rbenv', '~> 2.0', require: false
  gem 'capistrano3-unicorn'
end



# SEO
gem 'meta-tags', :require => 'meta_tags'

gem 'acts-as-taggable-on', '~> 3.4'

gem 'carrierwave'
gem 'rmagick'
gem 'fog'
# Use jquery as the JavaScript library
gem 'jquery-rails'
gem 'jquery-ui-rails'
# Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
gem 'turbolinks'
gem 'jquery-turbolinks'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.0'
# bundle exec rake doc:rails generates the API under doc/api.
gem 'sdoc', '~> 0.4.0', group: :doc

# Use ActiveModel has_secure_password


# Use Unicorn as the app server
# gem 'unicorn'

# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug'
  gem 'pry'
  gem 'pry-doc'
  gem 'pry-byebug'
  gem 'pry-rails'
  gem 'awesome_print'
  gem 'bullet'

  # Access an IRB console on exception pages or by using <%= console %> in views
  gem 'web-console', '~> 2.0'

  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
  gem 'spring'


end

有谁知道我该如何解决这个问题？

谢谢

【问题讨论】：

尝试删除 Gemfile.lock 并再次运行 bundle install。 Bcrypt 带有 Rails，用于保护密码等。
我已经这样做了，但它不起作用。我遇到了同样的错误。
您的问题解决了吗？
还没有......我删除了 gemfile.lock 并运行捆绑安装。然后我在尝试部署时遇到了同样的错误

标签： ruby-on-rails ruby-on-rails-4 rubygems capistrano

【解决方案1】：

sudo apt-get install ruby-dev

救了我

【讨论】：

但是为什么需要安装ruby-dev呢？

【解决方案2】：

bcrypt 依赖于 gmp 库。

在 Ubuntu 上安装 libgmp-dev 包

sudo apt-get install libgmp-dev

在 Cent 操作系统上，安装 libgmp-devel 包

sudo yum install libgmp-devel

【讨论】：

它说你不能使用libgmp-devel。（它是日本人写的，所以我翻译了）。我使用 Amazon Linux 作为服务器。

【解决方案3】：

添加

gem 'bcrypt', '~> 3.1.7'

进入您的 Gemfile 并删除您的 Gemlockfile，

然后运行

bundle install

【讨论】：

【解决方案4】：

尝试将此行添加到您的 Gemfile gem 'bcrypt', '~> 3.1', '>= 3.1.10' 并运行 bundle install

【讨论】：

【解决方案5】：

它说你不能使用libgmp-devel。（它是日本人写的，所以我翻译了）。我使用 Amazon Linux 作为服务器。

Amazon Linux 基于 CentOS，因此您可以使用 yum 命令和 libgmp-devel 库。

【讨论】：

【解决方案6】：

在 mac OSx 上试试这个。 gem brew install gmp。

【讨论】：