ruby - 无法加载从 git 源安装的 gem (LoadError : cannot load such file)

Question

我在 monorepo 结构中创建了一个名为 registry_client 的 gem。希望我可以在我的 frontend-app 内部使用它。但是，当我尝试使用 bundler bundle exec ruby​​ app.rb 运行它时遇到了这个错误:

LoadError: cannot load such file -- registry_client

frontend-app 中的 Gemfile:

source 'https://rubygems.org'

gem 'registry_client', git: 'https://github.com/.../some_repo.git', branch: 'master', glob: 'registry-client/*.gemspec'

我在 bundle install 之后用 bundle list 验证了 gem 是否成功安装:

Gems included by the bundle:
  ...
  * registry_client (0.1.1 f93f5bd)
  ...

这是 repo 结构:

├── frontend-app
│   ├── Gemfile
│   ├── Gemfile.lock
│   ├── Rakefile
│   ├── app.rb
│   ├── config
│   ├── config.ru
│   ├── test
│   └── views
└── registry-client
    ├── Gemfile
    ├── lib
    ├── registry_client.gemspec
    └── test

应用.rb

require 'registry_client'

...

registry_client.gemspec

# frozen_string_literal: true

require_relative 'lib/version'

Gem::Specification.new do |spec|
  spec.name          = 'registry_client'
  spec.summary       = 'Registry client for using Redis as Service Registry.'
  spec.authors       = ['Author']
  spec.version       = RegistryClient::VERSION
  spec.required_ruby_version = Gem::Requirement.new('>= 2.3.0')

  # Specify which files should be added to the gem when it is released.
  # The `git ls-files -z` loads the files in the RubyGem that have been added into git.
  spec.files = Dir.chdir(File.expand_path(__dir__)) do
    `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
  end
  spec.bindir        = 'exe'
  spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
  spec.require_paths = ['lib']
end

编辑:添加了 gemspec 文件

Answer 1

require 方法查看 $LOAD_PATH 中的目录，并尝试查找名称与参数 registry_client 匹配的文件。 gemspec 中的 spec.required_pa​​ths 属性指定:

Paths in the gem to add to $LOAD_PATH when this gem is activated. The default value is "lib"

因此，您的lib 目录必须有一个名为registry_client 的文件(在您的例子中，它将有.rb 扩展名)。更多相关信息:https://guides.rubygems.org/patterns/#loading-code