Comment by dzbarsky
13 hours ago
Look into Bazel, a very standard build system used at many large tech companies. It splits fetches from build/test actions and allows blocking network for build/test actions with a single CLI flag. No hassle at all.
The fact that you haven't come across this kind of setup suggests that your hundreds of CI systems are not representative of the industry as a whole.
I agree our sample may not be representative but we try to stay focused on the current and next crop of tpuf customers rather than the software industry as a whole. So far "CI prohibits network access during tests" just hasn't come up as a pain point for any of them, but as I mentioned in another comment [0], we're definitely keeping an open mind about introducing an offline dev experience.
(I am familiar with Bazel, but I'll have to save the war stories for another thread. It's not a build tool we see our particular customers using.)
[0]: https://news.ycombinator.com/item?id=46758156