I'm learning ruby recently and I'm a front-end developer, I found the dependecies are installed to C:/Ruby31-x64/lib/ruby/gems/3.1.0 folder when I use bundle install. it seems dependencies are installed globally by default like the npm install -g. I know that Bundler also have a way to install the gems to the local folder, so I wonder is it recommend to install the dependencies to the local folder like npm does?

CodePudding user response：

Similar to Composer, Bundler takes care of maintaining your dependencies, but rather than installing everything in the project folder, it distributes your gems system-wide, which are then shared by all of your projects. Using the Gemfile in your project folder, it keeps track of which libraries each project needs. Bundler is the default package manager for Rails, so you should simply let it do its thing. It does it quite well.

Hope this helps.

CodePudding user response：

Use a Version Manager for Ruby, and Bundler for Gem Version Management

There are occasionally reasons to install gems in from one another isolation, but most often you should use a Ruby version manager to manage your non-system Rubies and Bundler to handle multiple gem versions and locations. Avoid modifying your system Ruby or its gems whenever possible. Also, be aware that even using RVM gemsets (or similar features in other version managers) without tweaking some poorly documented features like rvm gemset globalcache enable can create a level of isolation that is likely unnecessary and can bloat disk usage dramatically.

If You Need Gem Isolation...

That said, if you want to ensure you are isolating your gems or localizing them to your application and aren't using direnv's Ruby layout to manage all the various environment variables involved, you can use Bundler's BUNDLE_PATH environment variable to "vendor" your gems into the local application directory (these days usually under vendor/bundle). For deployments or containerization, you can also invoke bundle-install with the --deployment or --standalone flags and a list of gem groups to install if you don't want to rely on the availability of Bundler itself after installing the gems.

This sort of thing might be useful for building containers or tarballs, but isn't really very useful for development. Don't do it unless you have a really strong reason.