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Is there a standard help command for individual rake tasks?
rake -h displays the options for rake.
rake -D describes the rake tasks.
rake mytask runs mytask.
Is there something like rake -h mytask that would describe mytask, and list its optional and/or required arguments?
For example, the following code will run an individual test in rails:
rake test TEST=path_to_test
How do I discover that TEST=path_to_test is an optional argument to rake test?
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Go to Websites & Domains and click Ruby. After gems installation you can try to run a Rake task by clicking Run rake task. In the opened dialog, you can provide some parameters and click OK - this will be equivalent to running the rake utility with the specified parameters in the command line.
You can create these custom rake tasks with the bin/rails generate task command. If your need to interact with your application models, perform database queries and so on, your task should depend on the environment task, which will load your application code.
The command rake -D test does not on my system. Instead you can use
# list test command with details
rake test -D
# list all test tasks with description
rake test -T
# list all test tasks even without description(Recommened)
rake test -T -A
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