Rake tasks
| Your first task | |
| Describe tasks | |
| Dependencies | |
| Default task |
Your first task
Rake reads a file named Rakefile in the current directory and runs the requested task.
A task pairs a name with a block, and rake greet runs the block from the terminal.
task :greet do
puts "Hello from Rake"
end
rake greet
Hello from Rake
Describe tasks
The desc line documents the task below it for the task list.
Run rake -T to see every described task with its one line summary.
desc "Say hello"
task :greet do
puts "Hello from Rake"
end
rake -T
rake greet # Say hello
Dependencies
Tasks declare prerequisites that run first, which models real build order.
Greet depends on prepare, so preparing always happens before greeting.
task :prepare do
puts "Preparing"
end
task greet: :prepare do
puts "Hello from Rake"
end
rake greet
Preparing
Hello from Rake
Default task
The default task runs when the command names no task at all.
Point default at greet to make a bare rake call prepare and greet in order.
task :prepare do
puts "Preparing"
end
task greet: :prepare do
puts "Hello from Rake"
end
task default: :greet
rake
Preparing
Hello from Rake
Next: Environment and CLI
Article author: Arthur Isaev
