最簡單的例子
task :hello_wold do
puts 'Hello World!'
end
怎麼用？
$ rake hello_world
Hello World!
這種 rake db:migrate 有兩層的怎麼做?
namespace :db do
task :migrate do
# ...
end
end
rake -T 看到的簡短敘述哪來的？
desc "A hello world example!"
task :hello_wold do
puts 'Hello World!'
end
怎麼在 B 任務執行之前先執行 A?
A = :first, B = :second
namespace :dev do
desc "first"
task :first do
puts "first do this."
end
desc "second"
task :second => :first do
puts "then do this"
end
end
如何讓 C 任務在 A、B 都執行完後再執行？
C = :third
namespace :dev do
desc "first"
task :first do
puts "first do this."
end
desc "second"
task :second => :first do
puts "then do this"
end
task :third => [:second]
end
或是寫成這樣：
namespace :dev do
desc "first"
task :first do
puts "first do this."
end
desc "second"
task :second do
puts "then do this"
end
task :third => [:first, :second]
end
注意到區塊是可選的，即 :third 任務無需使用 do…end。
Rake 怎麼從命令行傳入參數：https://stackoverflow.com/questions/825748/how-to-pass-command-line-arguments-to-a-rake-task