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instance method
Gem::Specification#spec_file
spec_file
lib/rubygems/specification.rb
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# File tmp/rubies/ruby-3.0.5/lib/rubygems/specification.rb, line 2360
def spec_file
@spec_file ||= File.join spec_dir, "#{full_name}.gemspec"
end
Returns the full path to this spec’s gemspec file. eg: /usr/local/lib/ruby/gems/1.8/specifications/mygem-1.0.gemspec