Initializes an object to calculate the checksum of a file. The given “digest_klass“ should implement the “DigestClass“ interface. Note that the built-in Ruby digest classes duck type this properly: Digest::MD5, Digest::SHA1, etc.
# File lib/vagrant/util/file_checksum.rb, line 17 def initialize(path, digest_klass) @digest_klass = digest_klass @path = path end
This calculates the checksum of the file and returns it as a string.
@return [String]
# File lib/vagrant/util/file_checksum.rb, line 26 def checksum digest = @digest_klass.new File.open(@path, "rb") do |f| while !f.eof begin buf = f.readpartial(BUFFER_SIZE) digest.update(buf) rescue EOFError # Although we check for EOF earlier, this seems to happen # sometimes anyways [GH-2716]. break end end end return digest.hexdigest end