[Haskell-cafe] When the gauge depends on what it measures

[Alexander Bernauer]

Hi,

I am currently working on benchmarking the pretty library.

Pretty itself has no non-trivial dependencies. But criterion and
language-c, which I use to perform the benchmarks, directly and/or
indirectly depend on pretty. Everything is configured in one Cabal file via
library and benchmark sections.

Now, whenever I modify pretty and want to rebuild the bench executable,
things become messy. Either I rebuild criterion et al. as well, or the
bench executable ends up with two different pretty version built in - if
this is even possible.

Until now I could not find a robust workflow for this scenario. At some
point pretty "shadows" itself and the build fails (c.f. my previous caffee
post).

What is the right way to handle this scenario?

Confused greetings,

Alex
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