Question

While working with old app using rails 2.0.2 with ruby 1.8.6, getting following problem…

when I try to execute any rake(v 0.8.3) command { eg. rake routes}.

rake aborted!
Don't know how to build task 'routes'
~/.rvm/gems/ruby-1.8.6-p420@rails202/gems/rake-0.8.3/lib/rake.rb:1706:in `[]'
~/.rvm/gems/ruby-1.8.6-p420@rails202/gems/rake-0.8.3/lib/rake.rb:2018:in `invoke_task'
 ~/.rvm/gems/ruby-1.8.6-p420@rails202/gems/rake-0.8.3/lib/rake.rb:1997:in `top_level'
~/.rvm/gems/ruby-1.8.6-p420@rails202/gems/rake-0.8.3/lib/rake.rb:1997:in `each'
~/.rvm/gems/ruby-1.8.6-p420@rails202/gems/rake-0.8.3/lib/rake.rb:1997:in `top_level'
~/.rvm/gems/ruby-1.8.6-p420@rails202/gems/rake-0.8.3/lib/rake.rb:2036:in `standard_exception_handling'
~/.rvm/gems/ruby-1.8.6-p420@rails202/gems/rake-0.8.3/lib/rake.rb:1991:in `top_level'
~/.rvm/gems/ruby-1.8.6-p420@rails202/gems/rake-0.8.3/lib/rake.rb:1970:in `run'
~/.rvm/gems/ruby-1.8.6-p420@rails202/gems/rake-0.8.3/lib/rake.rb:2036:in `standard_excetion_handling'
~/.rvm/gems/ruby-1.8.6-p420@rails202/gems/rake-0.8.3/lib/rake.rb:1967:in `run'
~/.rvm/gems/ruby-1.8.6-p420@rails202/bin/rake:31

Initially there was no rakefile, I added one with following contents

# Add your own tasks in files placed in lib/tasks ending in .rake,
# for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.

require File.expand_path('../config/application', __FILE__)
require 'rake'

XXX::Application.load_tasks

Answer 1

I have a rails 2.3.8 app

The Rakefile looks like this:

# Add your own tasks in files placed in lib/tasks ending in .rake,
# for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
require 'thread'
require(File.join(File.dirname(__FILE__), 'config', 'boot'))

require 'rake'
require 'rake/testtask'
require 'rake/rdoctask'

require 'tasks/rails'

The rake file you have added is rails 3 compatible ,I do not think it works for earlier version.

EDIT: You must be having the setup for rails 2.0.2 already , i would recommend to create a new rails 2.0.2 app and identify the missing links.