Use shell script function directly on bash

Question

I have a utilitarian shell script full of goodies and wish to bring them to the bash environment. I used the command source before as analogous to import or include in other languages.

printer.sh

#!/bin/bash

printAwesome () {
    echo "Awesome!"
}

printMoo () {
    echo "Moo!"
}

I think it is only running the command source printer.sh on terminal. Is it really? Do we have any other procedure to follow?

In python, we have environments which we activate and deactivate.

Answer 1

If I understand correctly what it is you are trying to achieve, then loading your file with source is not enough. If you wish to use printer.sh as a module, you need to export each function's name that should be available outside your script. So printer.sh should look like this:

#!/bin/bash

printAwesome () {
    echo "Awesome!"
}

printMoo () {
    echo "Moo!"
}

export -f printAwesome
export -f printMoo

And then you can write something like this in myscript.sh:

#!/bin/bash

source printer.sh
echo "Let's run these functions ..."
printAwesome
printMoo
echo "Hey, that works now!"