I'd consider defining config_hash like this
```ruby
@config_hash = Hash.new { |h, k| h[k] = {} }
```

so I could do this
```ruby
@config_hash[section.to_sym][key.to_sym] = aug.get(path)
```

also I'd
```ruby
(section, key) = path.split('/')[-2..-1].map(&:to_sym)
```

so result would look like
```ruby
@config_hash[section][key] = aug.get(path)
```