Class: Rubino::Config::Writer

Inherits:
Object
  • Object
show all
Defined in:
lib/rubino/config/writer.rb

Overview

Writes configuration changes back to the YAML file.

Instance Method Summary collapse

Constructor Details

#initialize(config_path:) ⇒ Writer

Returns a new instance of Writer.



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# File 'lib/rubino/config/writer.rb', line 10

def initialize(config_path:)
  @config_path = config_path
end

Instance Method Details

#get(key_path) ⇒ Object

Returns the value at a dot-notation key path



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# File 'lib/rubino/config/writer.rb', line 35

def get(key_path)
  raw = load_raw
  keys = key_path.split(".")
  # A scalar intermediate node (e.g. a String) has no #dig; treat such a
  # path as "not found" rather than crashing with a TypeError.
  raw.dig(*keys)
rescue TypeError
  nil
end

#set(key_path, value) ⇒ Object

Sets a single key (dot-notation) to a value and persists



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# File 'lib/rubino/config/writer.rb', line 15

def set(key_path, value)
  raw = load_raw
  keys = key_path.split(".")
  hash = raw

  keys[0..-2].each_with_index do |k, i|
    hash[k] ||= {}
    hash = hash[k]
    next if hash.is_a?(Hash)

    traversed = keys[0..i].join(".")
    raise ConfigurationError,
          "cannot set '#{key_path}': '#{traversed}' is a scalar value, not a section"
  end

  hash[keys.last] = coerce_value(value)
  save(raw)
end