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# File 'lib/referral/ensures_working_ruby.rb', line 5
def call
major, minor = RUBY_VERSION.split(".").map(&:to_i)
unless major >= 3 || (major == 2 && minor >= 6)
warn <<-ERROR.gsub(/^ {10}/, "")
Error: referral must be run with Ruby 2.6 or later, but this is #{RUBY_VERSION}.
You can often analyze older Ruby code by running this CLI with a newer
Ruby than the code being inspected.
Tools like rbenv may help you manage this issue. If you install
referral into a supported Ruby, you can specify that it be run with
an environment variable, even if the current directory is locked
to an older version of Ruby. Just specify the Ruby you want to use:
RBENV_VERSION=2.6.3 referral
ERROR
raise Referral::Error.new(
"Unsupported Ruby version (expected 2.6.0 or later, was #{RUBY_VERSION}"
)
end
end
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