Recipe Demonstrating how chef's two pass model, and lazy evaluation interacts

two-pass-example.rb

node.set[:lazy] = false

log 'compile evaluation' do
  message node[:lazy].to_s
end
# false

log 'execute evaluation' do
  message lazy { node[:lazy].to_s }
end
# true

ruby_block 'set lazy during execute' do
  block do
    node.set[:lazy] = true
  end
end

log 'after ruby block not lazy' do
  message node[:lazy].to_s
end
# false

log 'lazy' do
  message lazy { node[:lazy].to_s }
end
# true

node.set[:lazy] = true

log ' after compile not lazy' do
  message node[:lazy].to_s
end
# true

log 'lazy' do
  message lazy { node[:lazy].to_s }
end
# true