rake argument for task group

Question

How can I pass an argument to a group of rake tasks?

I can pass an argument to each individual task (foo1, foo2):

desc "foo1"
task :foo1, [ :mode ] => :environment do |t, args|

  mode = args[:mode]
  puts "foo1 mode = #{mode}"

end

desc "foo2"
task :foo2, [ :mode ] => :environment do |t, args|

  mode = args[:mode]
  puts "foo2 mode = #{mode}"

end

desc "all_foos"
task :all_foos, [ :mode ] => [ :foo1, :foo2 ]

As you can see, foo1 and foo2 are grouped in all_foos. The all_foos task also accepts the mode argument, but I have no clue how to pass the mode argument to foo1 and foo2 in all_foos.

score 1 · Accepted Answer · edited May 23 '17 at 12:06

1

You can invoke the tasks from your all_foos task and pass in any args you want:

desc "all_foos"
task :all_foos, [ :mode ] => :environment do |task, args|
  Rake::Task['foo1'].invoke args[:mode]
  Rake::Task['foo2'].invoke args[:mode]
end

Here's more: How to run Rake tasks from within Rake tasks?

edited May 23 '17 at 12:06

Community

1
1

answered Nov 27 '13 at 15:09

DiegoSalazar

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Which tutorial you used to learn `Rake`. I am also learning `Rake`. – Arup Rakshit Nov 27 '13 at 15:11
this is why i always like official documentation – Irfan Ahmad Oct 29 '16 at 06:52

score 0 · Answer 2 · answered Nov 27 '13 at 20:17

Did you try your code?

When I execute your code

require 'rake'

task :environment 

desc "foo1"
task :foo1, [ :mode ] => :environment do |t, args|

  mode = args[:mode]
  puts "foo1 mode = #{mode}"

end

desc "foo2"
task :foo2, [ :mode ] => :environment do |t, args|

  mode = args[:mode]
  puts "foo2 mode = #{mode}"

end

desc "all_foos"
task :all_foos, [ :mode ] => [ :foo1, :foo2 ]

Rake.application['all_foos'].invoke('par1')

I get

foo1 mode = par1
foo2 mode = par1

With

Rake.application['all_foos'].invoke('par2')

I get:

foo1 mode = par2
foo2 mode = par2

This is the solution you want.

Remark: Rake.application['all_foos'].invoke('par2') is the same as an external rake call rake all_foos[par2]

To go further: You can also use different parameters.

CHeck this code:

require 'rake'

task :environment 

desc "foo1"
task :foo1, [ :mode1 ] => :environment do |t, args|

  mode = args[:mode1]
  puts "foo1 mode = #{mode}"

end

desc "foo2"
task :foo2, [ :mode2 ] => :environment do |t, args|

  mode = args[:mode2]
  puts "foo2 mode = #{mode}"

end

desc "all_foos"
task :all_foos, [ :mode1, :mode2 ] => [ :foo1, :foo2 ]

Rake.application['all_foos'].invoke('par1', 'par2')

With Rake.application['all_foos'].invoke('par1', 'par2') (or rake all_foos[par1,par2]) I get:

foo1 mode = par1
foo2 mode = par2

With Rake.application['all_foos'].invoke('par1', 'par2') (or rake all_foos[par1,par2]) I get:

foo1 mode = par1
foo2 mode = par2

With Rake.application['all_foos'].invoke(nil, 'par2') I get

foo1 mode = 
foo2 mode = par2

With Rake.application['all_foos'].invoke('par1') I get

foo1 mode = par1
foo2 mode =

If your main task contains all parameter names, you can pick the needed parameters in your subtasks.

Disadvantage: The sequence in the call differs between main task and subtasks.

rake argument for task group

2 Answers2