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module Declarative
# {Defaults} is a mutable DSL object that collects default directives via #merge!.
# Internally, it uses {Variables} to implement the merging of defaults.
class Defaults
def initialize
@static_options = {}
@dynamic_options = ->(*) { {} }
end
# Set default values. Usually called in Schema::defaults.
# This can be called multiple times and will "deep-merge" arrays, e.g. `_features: []`.
def merge!(hash={}, &block)
@static_options = Variables.merge( @static_options, handle_array_and_deprecate(hash) )
@dynamic_options = block if block_given?
self
end
# Evaluate defaults and merge given_options into them.
def call(name, given_options)
# TODO: allow to receive rest of options/block in dynamic block. or, rather, test it as it was already implemented.
evaluated_options = @dynamic_options.(name, given_options)
options = Variables.merge( @static_options, handle_array_and_deprecate(evaluated_options) )
Variables.merge( options, handle_array_and_deprecate(given_options) ) # FIXME: given_options is not tested!
end
def handle_array_and_deprecate(variables)
wrapped = Defaults.wrap_arrays(variables)
warn "[Declarative] Defaults#merge! and #call still accept arrays and automatically prepend those. This is now deprecated, you should replace `ary` with `Declarative::Variables::Append(ary)`." if wrapped.any?
variables.merge(wrapped)
end
# Wrap arrays in `variables` with Variables::Append so they get appended to existing
# same-named arrays.
def self.wrap_arrays(variables)
Hash[ variables.
find_all { |k,v| v.instance_of?(Array) }.
collect { |k,v| [k, Variables::Append(v)] }
]
end
end
end
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3 entries across 3 versions & 3 rubygems