Mac OS X has a nice command-line utility called powermetrics that can perform a range of power-related measurements. Does anybody know if the source code is available for it? I’ve looked on Apple’s Open Source site but couldn’t find it. (In contrast, I did find the source code for top, which has some much simpler power measurements.)

I’d also love to see source code for the Activity Monitor, but given that it’s a graphical application rather than a command-line application, it seems less likely it will be available.

https://blog.mozilla.org/nnethercote/2015/08/06/source-code-for-powermetrics/