How to avoid recompiling in this cabal file?

Question

I\'ve been working on this Haskell project, and I have a cabal file for it. Now, my project is structured as a library that implements a simple interpreter. I also have a ve

Answer 1

In your executable section, add the library in Build-Depends so that the executable depends on the library.

There's a small gotcha, though: You also have to move the Main.hs of the executable (and any other source files specific to the executable) to a different subdirectory and specify a different Hs-Source-Dirs so that it doesn't pick up the library modules by being in the same folder.

executable HaSC
    Build-Depends: HaSC
    Main-Is: Main.hs
    Hs-Source-Dirs: foo -- Directory you moved Main.hs to

For this to work, you will need to specify Cabal-Version >= 1.8. See Cabal ticket #89 for the details.