How to add alias to .bashrc via shell script?

Question

I would like to append a command alias to a .bashrc file via script. However, I got confused when it comes to escaping it.
The alias is simple:

logtee() {
    tee -a "${SCENARIO_LOG_FOLDER:?'empty_log_folder'}/$1"
}

I've seen answers to similar question, but echo -e doesn't work in this case.

Answer 1

You have to escape " and $ in your content:

echo -e "logtee() {
    tee -a \"\${SCENARIO_LOG_FOLDER:?'empty_log_folder'}/\$1\"
}" >> ~/.bashrc