Can I change the terminal's PS1 only when working in certain directories/sub-directories?

Question

I would like to change PS1, but only if I am working in a particular directory. Is this possible, and how can I do this?

Answer 1

Yes this is possible. I have used PROMPT_COMMAND to make this possible. This function is executed before any other command and is here where you can compare your current directory and make whatever you need. As you can see I am only checking the last path of the directory and just showing the apple logo if matches.

function __get_dir {
    DIR=$(basename `pwd`)
    if [[ $DIR == "desiredDir" ]]
    then
    LOGO=" "
    else
    LOGO=""
    fi
}

PROMPT_COMMAND='__get_dir'

PS1="\W \u\[\033[0;33m\]\$(parse_git_branch_and_add_brackets) \$LOGO\[\033[0m\]\$ "