Provide option to not update when on battery

[dvcrn]

Since it starts on boot, this can also happen when in a place like a cafe and running off battery

Provide a setting/flag to not run autoupdate when currently on battery

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.

[dvcrn]

Not stale

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.

[DomT4]

Have added some labels that will hopefully stop the bot automatically closing the issue.

[swissbuechi]

I did not find an option to handle this request with launchd.
We could add a check inside the /Users/$(whoami)/Library/Application Support/com.github.domt4.homebrew-autoupdate/brew_autoupdate script with pmset -g ps.
It's a bit "dirty" in my opinion, because we need to grep the output from pmset.

Example brew_autoupdate:

#!/bin/sh
if [[ $(pmset -g ps | head -1) =~ "Battery Power" ]]; then
  echo "Not starting autoupdate, because device is running on Battery"
  exit
fi

# Script content ...
echo "Starting autoupdate..."

A better solution would be to use this COM Interface from the IOKit https://developer.apple.com/documentation/iokit/iopowersources_h/1810316-iopsgetprovidingpowersourcetype.
It maybe can somehow be invoked from inside the brew_autoupdate script.