How to have multiple build flavors with stack?

Question

When developing, I want to build everything with -O0 to save time.

But when building the same package on a CI system, I want to use -O.

One option I see would be to have two different stack.yaml files differing in their ghc-options, but then I'd have to make all changes to stack.yaml in two places.

Having an alias for stack --ghc-options=-O0 doesn't work, because I want -O0 to apply only to local packages, not the snapshot, and there's no way to specify that on the command line, from what I know.

Are there any better options?

Michael Snoyman · Accepted Answer · 2015-09-07 14:26:48Z

2

Actually, stack build --ghc-options=-O0 will apply -O0 to only the local packages, not to the snapshot packages. For more information, see:

https://github.com/commercialhaskell/stack/blob/master/GUIDE.md#ghc-options

answered Sep 7, 2015 at 14:26

Michael Snoyman

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2 Comments

Roman Cheplyaka Over a year ago

Thanks, good to know. So would this be the recommended solution for unoptimized builds?

Michael Snoyman Over a year ago

Yes, it's exactly what I do during development.

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