func Sub()

in pkg/common/resource.go [367:394]

• 23 lines of code
• 6 McCabe index (conditional complexity)

func Sub(left *si.Resource, right *si.Resource) *si.Resource {
	if left == nil {
		left = &si.Resource{}
	}
	if right == nil {
		return left
	}

	// clone left
	rb := NewResourceBuilder()
	for k, v := range left.Resources {
		rb.AddResource(k, v.Value)
	}
	result := rb.Build()

	// sub right
	for k, v := range right.Resources {
		if _, ok := result.Resources[k]; !ok {
			result.Resources[k] = &si.Quantity{
				Value: -v.Value,
			}
		} else {
			result.Resources[k].Value -= v.Value
		}
	}

	return result
}