How to do continuous build in Koka compiler?

[swarnpriya]

I made some changes in the compiler and built the compiler using "stack update; stack build; stack exec koka ..." to test my new changes. Now when I make other changes to the same function (newly added) in the compiler, the built does not incorporate it and gets stuck to the old built (even after performing "stack clean; stack update; stack build; stack exec koka ..." again).

[TimWhiting]

You do not need to do stack clean / stack update every time. In particular I typically use stack run koka instead of stack build stack exec koka. First try doing that.

If that doesn't work:
I can think of a few potential reasons for your issues currently.

1. You are not running stack exec and are just running koka and you are getting some other koka installation - most likely not this, but it doesn't hurt to check.
2. It could also be a difference between stack build --fast and stack build, since those create two different optimization levels of the binary. To debug stack issues try running stack path, and look for the install path (you can run Koka directly from there).
3. Another issue is that you might have errors in stack build - there is no partial compilation in Haskell, so if there are any type errors or anything, you will not get a new binary.
4. The final issue that I can think of is that you are getting the new function, but it just isn't doing what you expect due to Haskell's laziness.