I need to check a variable's existence in an
if statement. Some kind of analogy
if [ -v $somevar ] then echo "Variable somevar exists!" else echo "Variable somevar does not exist!"
And the closest question to that was this, which doesn't actually answer my question.
In modern bash (version 4.2 and above).
[[ -v name_of_var ]]
help test .
-v VAR, True if the shell variable VAR is set