ruby-on-rails - webpacker 在 Rails 4.2 上安装不成功

Question

终端:Windows 10 上 Ubuntu 上的 bash rails :4.2.8npm:5.5.1 Node :v8.9.1 yarn :1.3.2

rake webpacker:install后，控制台显示如下。虽然最后显示“安装成功”，但日志中出现了一些错误。正常吗？

  create  config/webpacker.yml
Copying webpack core config and loaders
  create  config/webpack
  create  config/webpack/development.js
  create  config/webpack/environment.js
  create  config/webpack/production.js
  create  config/webpack/test.js
Copying .postcssrc.yml to app root directory
  create  .postcssrc.yml
Copying .babelrc to app root directory
  create  .babelrc
Creating javascript app source directory
   exist  app/javascript
   identical  app/javascript/packs/application.js
Installing binstubs
     run  bundle binstubs webpacker from "."
  append  .gitignore
Installing all JavaScript dependencies
     run  yarn add @rails/webpacker coffeescript@1.12.7 from "."
yarn add v1.3.2
info No lockfile found.
[1/4] Resolving packages...
[2/4] Fetching packages...
info fsevents@1.1.3: The platform "linux" is incompatible with this module.
info "fsevents@1.1.3" is an optional dependency and failed compatibility check. Excluding it from installation.
[3/4] Linking dependencies...
warning "@rails/webpacker > postcss-cssnext@3.0.2" has unmet peer dependency "caniuse-lite@^1.0.30000697".
error An unexpected error occurred: "EINVAL: invalid argument, lstat '/mnt/d/Github/cfegame/node_modules/babel-core/package-lock.json'".
info If you think this is a bug, please open a bug report with the information provided in "/mnt/d/Github/cfegame/yarn-error.log".
info Visit https://yarnpkg.com/en/docs/cli/add for documentation about this command.
Installing dev server for live reloading
     run  yarn add --dev webpack-dev-server from "."
yarn add v1.3.2
info No lockfile found.
[1/4] Resolving packages...
[2/4] Fetching packages...
info fsevents@1.1.3: The platform "linux" is incompatible with this module.
info "fsevents@1.1.3" is an optional dependency and failed compatibility check. Excluding it from installation.
[3/4] Linking dependencies...
warning "webpack-dev-server > webpack-dev-middleware@1.12.1" has unmet peer dependency "webpack@^1.0.0 || ^2.0.0 || ^3.0.0".
warning " > webpack-dev-server@2.9.4" has unmet peer dependency "webpack@^2.2.0 || ^3.0.0".
error An unexpected error occurred: "EINVAL: invalid argument, lstat '/mnt/d/Github/cfegame/node_modules/camelcase-keys/node_modules/camelcase/license'".
info If you think this is a bug, please open a bug report with the information provided in "/mnt/d/Github/cfegame/yarn-error.log".
info Visit https://yarnpkg.com/en/docs/cli/add for documentation about this command.
Webpacker successfully installed 🎉 🍰

当我“成功安装”webpacker并想检查webpack-dev-server是否正常工作时，控制台显示如下。这是否意味着我没有正确安装 webpacker？

(home_dir)/.rvm/gems/ruby-2.3.3/gems/webpacker-3.0.2/lib/webpacker/dev_server_runner.rb:47:in `exec': No such file or directory - (project_dir)/node_modules/.bin/webpack-dev-server (Errno::ENOENT)
        from (home_dir)/.rvm/gems/ruby-2.3.3/gems/webpacker-3.0.2/lib/webpacker/dev_server_runner.rb:47:in `block in execute_cmd'
        from (home_dir)/.rvm/gems/ruby-2.3.3/gems/webpacker-3.0.2/lib/webpacker/dev_server_runner.rb:46:in `chdir'
        from (home_dir)/.rvm/gems/ruby-2.3.3/gems/webpacker-3.0.2/lib/webpacker/dev_server_runner.rb:46:in `execute_cmd'
        from (home_dir)/.rvm/gems/ruby-2.3.3/gems/webpacker-3.0.2/lib/webpacker/dev_server_runner.rb:11:in `run'
        from (home_dir)/.rvm/gems/ruby-2.3.3/gems/webpacker-3.0.2/lib/webpacker/runner.rb:6:in `run'
        from (home_dir)/.rvm/gems/ruby-2.3.3/gems/webpacker-3.0.2/exe/webpack-dev-server:8:in `<top (required)>'
        from bin/webpack-dev-server:17:in `load'
        from bin/webpack-dev-server:17:in `<main>'

Answer 1

基本上，yarn 正在管理您的包。他尝试使用 yarn add --dev webpack-dev-server from "." 安装 webpack-dev-server- 但失败了。这是关于 yarn add command 的文档

npm 是使用 yarn 安装软件包的替代方法，因此在服务器终端中运行

npm install webpack-dev-server

它应该安装依赖项

When I "successfully installed" webpacker and I want to check if webpack-dev-server worked properly, the console shows as follows. Did it mean I don't install webpacker properly?

(home_dir)/.rvm/gems/ruby-2.3.3/gems/webpacker-3.0.2/lib/webpacker/dev_server_runner.rb:47:in `exec': No such file or directory - (project_dir)/node_modules/.bin/webpack-dev-server (Errno::ENOENT)

您要么没有安装它，要么您正在搜索错误的路径，也许gem安装在.rvm/gems/ruby-2.3.3somethingelse

您可能想阅读的一些讨论

https://github.com/Microsoft/WSL/issues/2448

https://github.com/yarnpkg/yarn/issues/4188