# File lib/nanoc/base/compilation/item_rep_recorder_proxy.rb, line 70 def snapshot(snapshot_name, params={}) @rule_memory << [ :snapshot, snapshot_name, params ] # Count existing = Set.new names = @rule_memory.select { |r| r[0] == :snapshot }.map { |r| r[2] } names.each do |n| if existing.include?(n) raise Nanoc::Errors::CannotCreateMultipleSnapshotsWithSameName.new(@item_rep, snapshot_name) end existing << n end end