02-spice

Adding spice

1. Start an R session in this directory (02-spice)

   • RStudio users, open the *.Rproj file in this directory

2. Build the project:

   remake::make()

3. Fetch the ragout:

   remake::fetch("ragout")

4. Modify raw_meat.txt in this directory

   • Change the contents to <adjective> meat, e.g., marinated meat

5. Build the project again. How has the output changed?

   • If nothing changes, check that you have the latest version of the cooking package installed

6. Fetch the ragout again. Has it changed?

7. Modify raw_meat.txt in this directory again

   • Add a second line with arbitrary contents, e.g., from supermarket

8. Build the project again. How has the output changed?

   • Why is the fried_meat target not rebuilt?

     • Hint: Run cooking::chop("raw_meat.txt") in your R session

9. Edit remake.yml to spice up the frying rule with any spice of your choice, like this:

     fried_meat:
       command: fry(chopped_meat, with = I(c("oil", "pepper")))
   

10. Build the project

11. Fetch the updated ragout:

    remake::fetch("ragout")

    What has changed?