btop output in json format

[matteoguglielmi]

I use btop as a tool to gather the CPU temperatures of X86, ARM, and RISC-V systems by parsing its non-plain text output via a one-shot systemd service that executes this command:

script -c 'timeout 5 btop -p 0' /dev/null |
  sed 's/\x1b\[[0-9;]*[a-zA-Z]//g' |
  grep -Pho 'CPU.+\s+\K\d+(?='"$(echo $'\xc2\xb0')"'C)' |
  head -1

I use btop because it is a simple tool that works on any system, and I need just that.

Therefore, I'm asking the developer of btop to add two more command-line options to output btop's data in JSON format, e.g.:

btop -J -n2

which would generate two system snapshots in JSON format and then quit the program.

Thank you!