Class: Milkshake::DependencyResolver

Inherits:
Object
  • Object
show all
Includes:
TSort
Defined in:
lib/milkshake/dependency_resolver.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(gems) ⇒ DependencyResolver

Returns a new instance of DependencyResolver.



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# File 'lib/milkshake/dependency_resolver.rb', line 16

def initialize(gems)
  specs = gems.collect do |name,options|
    find_gemspec(name,options)
  end.compact
  
  @names = specs.collect { |spec| spec.name }
  @specs = specs.inject({}) { |memo, spec| memo[spec.name] = spec ; memo }
  @gems  = gems
end

Instance Attribute Details

#gems ⇒ Object (readonly)

Returns the value of attribute gems.



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# File 'lib/milkshake/dependency_resolver.rb', line 7

def gems
  @gems
end

#names ⇒ Object (readonly)

Returns the value of attribute names.



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# File 'lib/milkshake/dependency_resolver.rb', line 7

def names
  @names
end

#specs ⇒ Object (readonly)

Returns the value of attribute specs.



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# File 'lib/milkshake/dependency_resolver.rb', line 7

def specs
  @specs
end

Class Method Details

.load_for(gems) ⇒ Object 



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# File 'lib/milkshake/dependency_resolver.rb', line 9

def self.load_for(gems)
  dependency_loader = self.new(gems)
  dependency_loader.add_dependecies!
  dependency_loader.order_by_dependecies!
  return dependency_loader
end

Instance Method Details

#add_dependecies! ⇒ Object 



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# File 'lib/milkshake/dependency_resolver.rb', line 26

def add_dependecies!
  @specs.values.each do |spec|
    add_dependecies_for spec
  end
end

#each ⇒ Object 



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# File 'lib/milkshake/dependency_resolver.rb', line 36

def each
  @names.each do |name|
    yield(@specs[name])
  end
end

#order_by_dependecies! ⇒ Object 



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# File 'lib/milkshake/dependency_resolver.rb', line 32

def order_by_dependecies!
  @names = tsort
end

#reverse_each ⇒ Object 



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# File 'lib/milkshake/dependency_resolver.rb', line 42

def reverse_each
  @names.reverse.each do |name|
    yield(@specs[name])
  end
end