class KPM::BaseArtifact

def skip_if_exists(artifact_info, coordinates, sha1_file)
  # If there is no sha1 from the binary server, we don't skip
  # (Unclear if this is even possible)
  return false if artifact_info[:sha1].nil?
  # If there is no such sha1_file, we don't skip
  return false if sha1_file.nil? || !File.exist?(sha1_file)
  #
  # At this point we have a valid sha1_file and a remote sha1
  #
  sha1_checker = Sha1Checker.from_file(sha1_file)
  local_sha1 = sha1_checker.sha1(coordinates)
  # Support convenient 'SKIP' keyword for allowing hacking deployments (dev mode)
  return true if local_sha1 == 'SKIP'
  if artifact_info[:is_tgz]
    # For Ruby plugins, if there is an entry in the sha1_file and it matches the remote, we can skip
    local_sha1 == artifact_info[:sha1]
  else
    # For Java plugins and other artifacts, verify the file is still around
    local_sha1 == artifact_info[:sha1] && File.file?(artifact_info[:file_path])
  end
end