Receives a namespace, arguments and the behavior to invoke the generator.
It’s used as the default entry point for generate, destroy and update
commands.
# File railties/lib/rails/generators.rb, line 272
def invoke(namespace, args = ARGV, config = {})
names = namespace.to_s.split(":")
if klass = find_by_namespace(names.pop, names.any? && names.join(":"))
args << "--help" if args.empty? && klass.arguments.any?(&:required?)
klass.start(args, config)
else
options = sorted_groups.flat_map(&:last)
suggestions = options.sort_by { |suggested| levenshtein_distance(namespace.to_s, suggested) }.first(3)
suggestions.map! { |s| "'#{s}'" }
msg = "Could not find generator '#{namespace}'. ".dup
msg << "Maybe you meant #{ suggestions[0...-1].join(', ')} or #{suggestions[-1]}\n"
msg << "Run `rails generate --help` for more options."
puts msg
end
end
