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require 'librarian/spec'
module Librarian
class Dsl
class Target
class SourceShortcutDefinitionReceiver
def initialize(target)
singleton_class = class << self; self end
singleton_class.class_eval do
define_method(:source) do |options|
target.source_from_options(options)
end
target.source_types.each do |source_type|
name = source_type[0]
define_method(name) do |*args|
args.push({}) unless Hash === args.last
target.source_from_params(name, *args)
end
end
end
end
end
SCOPABLES = [:source, :sources]
attr_accessor :dsl
private :dsl=
attr_reader :dependency_name, :dependency_type
attr_reader :source_types, :source_types_map, :source_types_reverse_map, :source_type_names, :source_shortcuts
attr_reader :dependencies, :source_cache, *SCOPABLES
def initialize(dsl)
self.dsl = dsl
@dependency_name = dsl.dependency_name
@dependency_type = dsl.dependency_type
@source_types = dsl.source_types
@source_types_map = Hash[source_types]
@source_types_reverse_map = Hash[source_types.map{|pair| a, b = pair ; [b, a]}]
@source_type_names = source_types.map{|t| t[0]}
@source_cache = {}
@source_shortcuts = {}
@dependencies = []
@exclusions = []
SCOPABLES.each do |scopable|
instance_variable_set(:"@#{scopable}", [])
end
dsl.source_shortcuts.each do |name, param|
define_source_shortcut(name, param)
end
end
def to_spec
Spec.new(@sources, @dependencies, @exclusions)
end
def dependency(name, *args)
options = args.last.is_a?(Hash) ? args.pop : {}
source = source_from_options(options) || @source
dep = dependency_type.new(name, args, source)
@dependencies << dep
end
def exclusion(name)
@exclusions << name
end
def source(name, param = nil, options = nil, &block)
if !(Hash === name) && [Array, Hash, Proc].any?{|c| c === param} && !options && !block
define_source_shortcut(name, param)
elsif !(Hash === name) && !param && !options
source = source_shortcuts[name]
scope_or_directive(block) do
@source = source
@sources = @sources.dup << source
end
else
name, param, options = *normalize_source_options(name, param, options || {})
source = source_from_params(name, param, options)
scope_or_directive(block) do
@source = source
@sources = @sources.dup << source
end
end
end
def precache_sources(sources)
sources.each do |source|
key = [source_types_reverse_map[source.class], *source.to_spec_args]
source_cache[key] = source
end
end
def scope
currents = { }
SCOPABLES.each do |scopable|
currents[scopable] = instance_variable_get(:"@#{scopable}").dup
end
yield
ensure
SCOPABLES.reverse.each do |scopable|
instance_variable_set(:"@#{scopable}", currents[scopable])
end
end
def scope_or_directive(scoped_block = nil)
unless scoped_block
yield
else
scope do
yield
scoped_block.call
end
end
end
def normalize_source_options(name, param, options)
if name.is_a?(Hash)
extract_source_parts(name)
else
[name, param, options]
end
end
def extract_source_parts(options)
if name = source_type_names.find{|name| options.key?(name)}
options = options.dup
param = options.delete(name)
[name, param, options]
else
nil
end
end
def source_from_options(options)
if options[:source]
source_shortcuts[options[:source]]
elsif source_parts = extract_source_parts(options)
source_from_params(*source_parts)
else
nil
end
end
def source_from_params(name, param, options)
source_cache[[name, param, options]] ||= begin
type = source_types_map[name]
type.from_spec_args(environment, param, options)
end
end
def source_from_source_shortcut_definition(definition)
case definition
when Array
source_from_params(*definition)
when Hash
source_from_options(definition)
when Proc
receiver = SourceShortcutDefinitionReceiver.new(self)
receiver.instance_eval(&definition)
end
end
def define_source_shortcut(name, definition)
source = source_from_source_shortcut_definition(definition)
source_shortcuts[name] = source
end
def environment
dsl.environment
end
end
end
end
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