Class: Dry::Effects::Providers::Env

Inherits:
Object
  • Object
show all
Defined in:
lib/dry/effects/providers/env.rb

Constant Summary collapse

Locate = 
Effect.new(type: :env, name: :locate)

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#parent ⇒ Object (readonly)

Returns the value of attribute parent.



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# File 'lib/dry/effects/providers/env.rb', line 13

def parent
  @parent
end

Instance Method Details

#call(values = EMPTY_HASH, options = EMPTY_HASH) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Yield the block with the handler installed



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# File 'lib/dry/effects/providers/env.rb', line 41

def call(values = EMPTY_HASH, options = EMPTY_HASH)
  unless values.empty?
    @values = @values.merge(values)
  end

  if options.fetch(:overridable, false)
    @parent = ::Dry::Effects.yield(Locate) { EMPTY_HASH }
  else
    @parent = EMPTY_HASH
  end

  yield
end

#key?(key) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dry/effects/providers/env.rb', line 66

def key?(key)
  values.key?(key) || (key.is_a?(::String) && ::ENV.key?(key)) || parent.key?(key)
end

#locate ⇒ Provider

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Locate handler in the stack

Returns:



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# File 'lib/dry/effects/providers/env.rb', line 34

def locate
  self
end

#provide?(effect) ⇒ Boolean

Parameters:

Returns:

  • (Boolean) 


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# File 'lib/dry/effects/providers/env.rb', line 58

def provide?(effect)
  if super
    !effect.name.equal?(:read) || key?(effect.payload[0])
  else
    false
  end
end

#read(key) ⇒ Object 



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# File 'lib/dry/effects/providers/env.rb', line 15

def read(key)
  parent.fetch(key) { fetch(key) }
end