Ok, so googling found lots of interesting things to read; some deprecated some new.
So looking more deeply into some of the eclasses [1], it helps me to examine different ebuilds an eclass is inherited into; then specifically how those eclass constructs are used, by subsequently looking into a specific ebuild. Evidently, I'm not alone in this adventure as I have read lots of stuff about folks not choosing the best eclass to use for a specific task, not using a given eclass correctly and new (eclass) features that should be used which have been added to an existing eclass or as part of a new eclass. Surely this can be very dynamic, but, I'm mostly hacking at relatively straightforward ebuilds, so the existing semantics are probably fine for me in most cases, no bleeding edges here. So for a given eclass, how to I find the list of all ebuilds that use that eclass I'm interested in? Is my only option a brute force search of the "inherit" inside every ebuild? What if I only want to look at an eclass, like systemd, limited to a specific category of ebuilds, for example sys-cluster; what is the best tool/script to search for a specific eclass limited to a single category? James [1] https://devmanual.gentoo.org/eclass-reference/index.html
