class Chef::Whitelist
Public Class Methods
filter(data, whitelist=nil)
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filter takes two arguments - the data you want to filter, and a whitelisted array of keys you want included. You can capture a subtree of the data to filter by providing a “/”-delimited string of keys. If some key includes “/”-characters, you must provide an array of keys instead.
{ "filesystem" => { "/dev/disk" => { "size" => "10mb" }, "map - autohome" => { "size" => "10mb" } }, "network" => { "interfaces" => { "eth0" => {...}, "eth1" => {...} } } }, ["network/interfaces/eth0", ["filesystem", "/dev/disk"]])
will capture the eth0 and /dev/disk subtrees.
# File lib/chef/whitelist.rb, line 30 def self.filter(data, whitelist=nil) return data if whitelist.nil? new_data = {} whitelist.each do |item| self.add_data(data, new_data, item) end new_data end
Private Class Methods
add_data(data, new_data, item)
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Walk the data has according to the keys provided by the whitelisted item and add the data to the whitelisting result.
# File lib/chef/whitelist.rb, line 44 def self.add_data(data, new_data, item) parts = self.to_array(item) all_data = data filtered_data = new_data parts[0..-2].each do |part| unless all_data[part] Chef::Log.warn("Could not find whitelist attribute #{item}.") return nil end filtered_data[part] ||= {} filtered_data = filtered_data[part] all_data = all_data[part] end unless all_data[parts[-1]] Chef::Log.warn("Could not find whitelist attribute #{item}.") return nil end filtered_data[parts[-1]] = all_data[parts[-1]] new_data end
to_array(item)
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Accepts a String or an Array, and returns an Array of String keys that are used to traverse the data hash. Strings are split on “/”, Arrays are assumed to contain exact keys (that is, Array elements will not be split by “/”).
# File lib/chef/whitelist.rb, line 73 def self.to_array(item) return item if item.kind_of? Array parts = item.split("/") parts.shift if !parts.empty? && parts[0].empty? parts end