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Here's probably a very "newbieish" question on Bundler, but I'm wondering how bundle install knows what environment to use or how to set it? Or do I even need to? My problem is that I've grouped my gems (in Gemfile) by environments and when deploying now I only want production gems to be installed.
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Bundler. require sets up the load paths and automatically requires every dependency, saving you from having to manually require each one.
The executables bundle & bundler have the same functionality and therefore can be used interchangeably. You can see in the bundler/exe directory that the bundler executable just loads the bundle executable. It seems to me that the bundle command is more commonly used than the bundler command.
At the top of the application.rb file you can see
# If you have a Gemfile, require the gems listed there, including any gems
# you've limited to :test, :development, or :production.
Bundler.require(:default, Rails.env) if defined?(Bundler)
When Rails is booted, Bundler automatically loads all the dependencies for the :default group and current environment.
Please note that when you run bundle install, Bundler resolves and install dependencies for all the environments, unless you specify a --without option
$ bundle install --without staging development test
In production, you might also want to add the --deployment flag.
More info about bundle install.
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