How to use a function defined in a bash profile in a bash script?

Question

I have a Projection function in my bash_profile. Now I am trying to call this function from a bash script however I get a not found error. How do I make the projection function visible to the bash script?

Answer 1

You must export the function

export -f foo

ref

Answer 2

The sane but not necessarily elegant approach is to put the function in a separate file, and source it from your profile and from your script.

You need to export the function if you want to make it available to all your scripts, but -- as with global variables -- this is not very maintainable in the long run.