Knife script to clean up extra checksum files

clean_up_checksums.rb

require 'chef'

puts "Looking for leftover checksums..."

#Get all checksums
currentChecksums = Chef::Checksum.cdb_all_checksums.keys

#Get all cookbook information
cookbookVersions = Chef::MinimalCookbookVersion.load_full_versions_of(Chef::MinimalCookbookVersion.load_all(nil), nil)

cookbookVersions.each do |cookbookVersion|
  Chef::CookbookVersion::COOKBOOK_SEGMENTS.each do |segment|
    cookbookVersion.manifest[segment].each do |file|
      currentChecksums.delete(file[:checksum])
    end
  end
end

if currentChecksums.size > 0

  puts "Leftover checksums : #{currentChecksums.size}"
  
  currentChecksums.each do |checksumValue|
    checksum = Chef::Checksum.cdb_load(checksumValue).purge
  end
  
  puts "Leftover checksums purged successfully!"
else
  puts "No checksums to remove"
end