class Bosh::Director::Jobs::Helpers::StemcellsToDeletePicker
Public Class Methods
new(stemcell_manager)
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# File lib/bosh/director/jobs/helpers/stemcells_to_delete_picker.rb, line 4 def initialize(stemcell_manager) @stemcell_manager = stemcell_manager end
Public Instance Methods
pick(stemcells_to_keep)
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# File lib/bosh/director/jobs/helpers/stemcells_to_delete_picker.rb, line 8 def pick(stemcells_to_keep) unused_stemcell_names_and_versions = @stemcell_manager .find_all_stemcells .select { |stemcell| stemcell['deployments'].empty? } unused_stemcells_grouped_by_name = unused_stemcell_names_and_versions.inject({}) do |h, stemcell| h[stemcell['name']] ||= [] h[stemcell['name']] << stemcell h end stemcells_to_versions_to_delete = unused_stemcells_grouped_by_name.each_pair do |_, versions| versions.sort! do |sc1, sc2| Bosh::Common::Version::StemcellVersion.parse(sc1['version']) <=> Bosh::Common::Version::StemcellVersion.parse(sc2['version']) end versions.pop(stemcells_to_keep) end stemcells_to_versions_to_delete.values.flatten end