Apple - Finding MacBook power status from command line (AC plugged in, or not)?

The pmset command has much shorter output than system_profiler:

pmset -g batt

The first line on my MacBook says "Now drawing from ..." either "AC Power" or "Battery Power" when it runs.

pmset -g batt | head -n 1 | cut -d \' -f2

You can just use the delimiter to and escape the single quote to get the extracted text.