mrbgemのためのRakefile

Rakefile

# frozen-string-literal: true

vendor_dir = "#{__dir__}/vendor"
ENV['MRUBY_ROOT'] = "#{vendor_dir}/mruby"
ENV['MRUBY_CONFIG'] = "#{__dir__}/build_config.rb"

namespace :mruby do
  if ENV['LOAD_MRUBY_RAKEFILE']
    load "#{ENV['MRUBY_ROOT']}/Rakefile"
  else
    task all: %w[mruby_rakefile!]
    task test: %w[mruby_rakefile!]
    task clean: %w[mruby_rakefile]
    task deep_clean: %w[mruby_rakefile]
  end
end

def exec_rake_with_mruby_rakefile(auto_setup: false)
  return if ENV['LOAD_MRUBY_RAKEFILE']

  Rake::Task['setup'].invoke if !File.exist?(ENV['MRUBY_ROOT']) && auto_setup

  ENV['LOAD_MRUBY_RAKEFILE'] = '1'
  exec 'rake', *ARGV
end

task :mruby_rakefile! do
  exec_rake_with_mruby_rakefile(auto_setup: true)
end

task :mruby_rakefile do
  exec_rake_with_mruby_rakefile if File.exist?(ENV['MRUBY_ROOT'])
end

desc 'setup'
task setup: %w[setup_mruby]

task :setup_mruby do
  # tarballをvendor_dirに展開するとかgit submodule update --initするとか
end

desc 'compile binary'
task compile: %w[mruby:all]

task default: %w[compile]