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|
module LeapCli
#
# This class represents the configuration for a single node, service, or tag.
#
class Config < Hash
def initialize(config_type, manager)
@manager = manager
@type = config_type
end
#
# lazily eval dynamic values when we encounter them.
#
def [](key)
value = fetch(key, nil)
if value.is_a? Array
value
elsif value.nil?
nil
else
if value =~ /^= (.*)$/
value = eval($1)
self[key] = value
end
value
end
end
#
# make the type appear to be a normal Hash in yaml.
#
def to_yaml_type
"!map"
end
#
# just like Hash#to_yaml, but sorted
#
def to_yaml(opts = {})
YAML::quick_emit(self, opts) do |out|
out.map(taguri, to_yaml_style) do |map|
keys.sort.each do |k|
v = self.fetch(k)
map.add(k, v)
end
end
end
end
#
# make obj['name'] available as obj.name
#
def method_missing(method, *args, &block)
if has_key?(method.to_s)
self[method.to_s]
else
super
end
end
#
# convert self into a plain hash, but only include the specified keys
#
def to_h(*keys)
keys.map(&:to_s).inject({}) do |hsh, key|
if has_key?(key)
hsh[key] = self[key]
end
hsh
end
end
def nodes
if @type == :node
@manager.nodes
else
@nodes ||= ConfigList.new
end
end
def services
if @type == :node
self['services'] || []
else
@manager.services
end
end
def tags
if @type == :node
self['tags'] || []
else
@manager.tags
end
end
private
##
## MACROS
## these are methods used when eval'ing a value in the .json configuration
##
#
# inserts the contents of a file
#
def file(filename)
filepath = Path.find_file(name, filename)
if filepath
File.read(filepath)
else
log0('no such file, "%s"' % filename)
""
end
end
end # class
end # module
|
