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I would like to execute a number of bash commands from a Rakefile.
I have tried the following in my Rakefile
task :hello do %{echo "World!"} end but upon executing rake hello there is no output? How do I execute bash commands from a Rakefile?
NOTE:This is not a duplicate as it's specifically asking how to execute bash commands from a Rakefile.
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When the program being executed is a shell script, bash will create a new bash process using a fork. This subshell reads the lines from the shell script one line at a time. Commands on each line are read, interpreted and executed as if they would have come directly from the keyboard.
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.
I think the way rake wants this to happen is with: http://rubydoc.info/gems/rake/FileUtils#sh-instance_method Example:
task :test do sh "ls" end The built-in rake function sh takes care of the return value of the command (the task fails if the command has a return value other than 0) and in addition it also outputs the commands output.
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