Class: LibyearBundler::Calculators::Libyear

Inherits:
Object
  • Object
show all
Defined in:
lib/libyear_bundler/calculators/libyear.rb

Overview

A libyear is the difference in time between releases of the newest and installed versions of the gem in years

Class Method Summary collapse

Class Method Details

.calculate(installed_version_release_date, newest_version_release_date) ⇒ Object 



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# File 'lib/libyear_bundler/calculators/libyear.rb', line 7

def calculate(installed_version_release_date, newest_version_release_date)
  di = installed_version_release_date
  dn = newest_version_release_date
  if di.nil? || dn.nil? || dn <= di
    # Known issue: Backports and maintenance releases of older minor versions.
    # Example: json 1.8.6 (2017-01-13) was released *after* 2.0.3 (2017-01-12)
    years = 0.0
  else
    days = (dn - di).to_f
    years = days / 365.0
  end
  years
end