`$RAKE_PRELOAD` to load custom Ruby file before starting application

Rake application loads Rakefile AFTER Rake.application.run() started.
Therefore it is not able to customize Rake.application.run() (or other methods defined in Rake.application) in Rakefile.

For example, I want to change Rake::Application#handle_options() to use parser.order(argv) instead of parser.parse(argv) in order not to parse options after task names.
(I'm developing rake extension to allow command-line options for each task, and parser.order() is necessary for this purpose.)

Here is my challenge (Rakefile):

## Rakefile

module Rake
  Application.class_eval do
    def handle_options(argv)
      set_default_options
      OptionParser.new do |opts|
        opts.banner = "#{Rake.application.name} [-f rakefile] {options} targets..."
        opts.separator ""
        opts.separator "Options are ..."

        opts.on_tail("-h", "--help", "-H", "Display this help message.") do
          puts opts
          exit
        end

        standard_rake_options.each { |args| opts.on(*args) }
        opts.environment("RAKEOPT")
      #end.parse(argv)    # !! original !!
      end.order(argv)     # !! customize !!
    end
  end
end

But the above Rakefile doesn't work intendedly because Rake application loads Rakefile after Rake.application.run() started.

Therefore, I hope Rake to provide a certain method to load custom ruby file before Rake.application.run() started.

One solution is to load a ruby file specified by the $RAKE_PRELOAD environment variable in rake command.

rake command:

#!/usr/bin/env ruby

require "rake"

preload = ENV['RAKE_PRELOAD']         # !!!
if preload && ! preload.empty?        # !!!
  require preload                     # !!!
end                                   # !!!

Rake.application.run

I'd like the dev team to consider this idea.

Inizia dal punto di ingresso del comando rake e segui il modo in cui Rake.application.run carica il Rakefile e invoca handle_options. Determina come potrebbe essere caricato un file di precaricamento prima di run, preservando il comportamento RAKE_PRELOAD proposto; il lavoro è completato quando il meccanismo è concordato, implementato e coperto da test per la personalizzazione di Rake.application.