Bundler 2未安装在docker内部

Question

我正在尝试在docker文件中安装bundler v2，并且安装成功。当我运行rubocop时，出现以下错误。

 warn_for_outdated_bundler_version': You must use Bundler 2 or greater with this lockfile. (Bundler::LockfileError)

似乎仍然认为我使用的是旧版本的捆绑器，如何解决此错误

Dockerfile是

FROM ruby:2.3.4-alpine

WORKDIR "/var/www/app"
COPY Gemfile Gemfile
COPY Gemfile.lock Gemfile.lock

RUN gem install bundler && bundle install

bin /捆绑文件是

require "rubygems"

m = Module.new do
  module_function

  def invoked_as_script?
    File.expand_path($0) == File.expand_path(__FILE__)
  end

  def env_var_version
    ENV["BUNDLER_VERSION"]
  end

  def gemfile
    gemfile = ENV["BUNDLE_GEMFILE"]
    return gemfile if gemfile && !gemfile.empty?
    File.expand_path("../../Gemfile", __FILE__)
  end

  def bundler_version
    @bundler_version ||= begin
      env_var_version || cli_arg_version ||
        lockfile_version || "#{Gem::Requirement.default}.a"
    end
  end

  def load_bundler!
    ENV["BUNDLE_GEMFILE"] ||= gemfile

    # must dup string for RG < 1.8 compatibility
    activate_bundler(bundler_version.dup)
  end

  def activate_bundler(bundler_version)
    if Gem::Version.correct?(bundler_version) && Gem::Version.new(bundler_version).release < Gem::Version.new("2.0")
      bundler_version = "< 2"
    end
    gem_error = activation_error_handling do
      gem "bundler", bundler_version
    end
    return if gem_error.nil?
    require_error = activation_error_handling do
      require "bundler/version"
    end
    return if require_error.nil? && Gem::Requirement.new(bundler_version).satisfied_by?(Gem::Version.new(Bundler::VERSION))
    warn "Activating bundler (#{bundler_version}) failed:\n#{gem_error.message}\n\nTo install the version of bundler this project requires, run `gem install bundler -v '#{bundler_version}'`"
    exit 42
  end

  def activation_error_handling
    yield
    nil
  rescue StandardError, LoadError => e
    e
  end
end

m.load_bundler!

if m.invoked_as_script?
  load Gem.bin_path("bundler", "bundle")
end

并且Gemfile.lock中的捆绑程序版本为2.0.2

Answer 1

在Dockerfile中设置BUNDLER_VERSION环境变量：

ENV BUNDLER_VERSION=2.0.2

或者如果您有docker.env：

BUNDLER_VERSION=2.0.2

Answer 2

我也遇到了这个问题，但除了定义BUNDLER_VERSION环境变量外，我还需要将该版本安装到我的容器中。

因此，我的Dockerfile看起来像：

FROM ruby:2.3.4-alpine

WORKDIR "/var/www/app"
ENV BUNDLER_VERSION=2.0.2

COPY Gemfile Gemfile
COPY Gemfile.lock Gemfile.lock

RUN gem install bundler -v "$BUNDLER_VERSION" && bundle install