func()

in path.go [217:254]

• 29 lines of code
• 7 McCabe index (conditional complexity)

func (p cfgPath) SetValue(cfg *Config, opt *options, val value) Error {
	fields := p.fields
	node := value(cfgSub{cfg})

	// 1. iterate until intermediate node not having some required child node
	for ; len(fields) > 1; fields = fields[1:] {
		field := fields[0]
		v, err := field.GetValue(opt, node)
		if err != nil {
			if err.Reason() == ErrMissing {
				break
			}
			return err
		}

		if isNil(v) {
			break
		}
		node = v
	}

	// 2. build intermediate nodes from bottom up

	for ; len(fields) > 1; fields = fields[:len(fields)-1] {
		field := fields[len(fields)-1]

		next := New()
		next.metadata = val.meta()
		v := cfgSub{next}
		if err := field.SetValue(opt, v, val); err != nil {
			return err
		}
		val = v
	}

	// 3. insert new sub-tree into config
	return fields[0].SetValue(opt, node, val)
}