Custom Preprocessed Files Don't Rebuild

[deech]

I have a custom preprocessor that converts files in my src directory to Haskell files. However when any of those originals change stack build doesn't appear to reprocess. If I do stack clean first that works.

[mgsloan]

Are those files listed in extra-source-files in your cabal file? If so, this could be a bug. It seems prudent to treat a package as being dirty if these files are changed. I don't see this being done anywhere here

[deech]

Yes they are. If it helps in my scenario I'm only building executables (no library). As I found out extra-source-files is only allowed once at the top of the Cabal file. If I put it in each executable's stanza, Cabal complains.

[NicolasT]

I believe I'm having a similar issue: a source file is listed in extra-source-files in the global section of my package, and then converted into a data-files member (also listed in the global section) through Custom build (Setup.hs calling out to some tool in the buildHook).

Unexpectedly, whenever I modify the source file, no rebuild is triggered: not when using stack build --file-watch, nor when running plain stack build multiple times.

[borsboom]

I think this is resolved by the merge of #2362. Please re-open if not.