# File lib/rake.rb, line 1951
1951:     def collect_tasks
1952:       @top_level_tasks = []
1953:       ARGV.each do |arg|
1954:         if arg =~ /^(\w+)=(.*)$/
1955:           ENV[$1] = $2
1956:         else
1957:           @top_level_tasks << arg
1958:         end
1959:       end
1960:       @top_level_tasks.push("default") if @top_level_tasks.size == 0
1961:     end