Q:

Bash -- Double quotes within Backtick

I'm using the following conditional in a bash script:
if `grep -q "${ACTION_LABEL} Action" "${OVERRIDE_ACTIONS}"`; then
  ....
fi

It basically works.   Except if any part of the path in ${OVERRIDE_ACTIONS} contains a space, then the grep fails.   How can I get this to work with paths containing spaces>

A:

Remove the backticks:
if grep -q "${ACTION_LABEL} Action" "${OVERRIDE_ACTIONS}"; then
    ...
fi

Why?  grep will return a value of 0 if it succeeded in finding occurences for your pattern, or 1 if it failed.  The body of the if statement will be executed, if the condition evaluates to 0. 