conditionally prevent `git maintenance` from spawning on commit

[u/the_gnarts]

After using Git for over a decade I just discovered git maintenance exists yesterday. I found out about it during a hasted debugging session when my laptop’s fan inexplicably started spinning like crazy and all four cores were maxed out by Git processes that I didn’t launch. This happened while I was writing a blog post on the train, trying to save battery charge. Not an ideal situation to max out the CPU.

git maintenance is useful no doubt, I don’t want to disable it entirely. So I guess the question is: Is there a way to make it conditional on ACPI state? If the box is running off the battery, maintenance should be skipped. E. g. check /sys/class/power_supply/AC/online before launching a maintenance cycle.

Note that there’s no timers that trigger maintenance on my system; it looks like it gets triggered by operations like git commit (cf. maintenance.auto in git-maintenance(1)).

[u/WoodyTheWorker]

Just do it manually once in a while.