Seems a decent approach for people already up to speed on Go language/tooling idioms.

Bash is definitely archaic, but personally I find it fairly sane and productive despite that. There's tolerable archaic and there's run-for-the-hills archaic.

Speaking of the latter, it's aversion to the ordeal that is getting anything done in the Windows Batch language (cmd.exe) that would drive me to seek out a nonstandard tool like mage.

As a makefile pragmatist (they’re awful but easy to get started with/most know them) I’m debating between mage and Bazel.

I like mage because it would eliminate a lot of make and bash silliness, but I also want to get into Bazel because of all the things it promises.