'What exactly is the 'platforms' argument for gem in Gemfile?
To start with basics, I see things like this in the Gemfile
# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
Is this code telling the Gemfile: "only install tzinfo-data gem if the platform is one of these: mingw, mswin, x64_mingw, jruby; if it's any other operating system, don't install it"?
Background: The reason for the interest in this is because I get a warning when running bundle install and I just want to understand how it all works before I start tinkering with it.
Also note: I searched https://api.rubyonrails.org/ for 'gem', 'group', and 'platforms' but I couldn't spot an explanation there.
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