Rake Capistrano - how to pass dynamic parameters to execute a shell command

Question

In my Rake capistrano script, I am creating shell commands that needs to have dynamic arguments. My rake code is as below

execute "sed -i '/SPARK_HOME=/c\\export SPARK_HOME=<arg1>' #{release_path}/backend_layer/configs/hdfs/cluster.sh"

How can I call this rake and send the argument <arg1>, so that my command is dynamic

Answer 1

Write your rake task like below

desc 'Passing argument on rake task'
task :symlink_shared, [:arg1] => :environment do |t, args|
  execute "sed -i '/SPARK_HOME=/c\\export SPARK_HOME=#{args.arg1}' #{release_path}/backend_layer/configs/hdfs/cluster.sh"
end

then, run the cap script with argument like below

cap staging postdeploy:symlink_shared[<your_arg1>]