End of Life Ruby 3.1 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

class method

Gem.solaris_platform?

solaris_platform?

# File tmp/rubies/ruby-3.1.3/lib/rubygems.rb, line 1012
def self.solaris_platform?
  RUBY_PLATFORM =~ /solaris/
end

Is this platform Solaris?

See also .ruby_version .source_date_epoch .rubygems_version .source_date_epoch_string also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2