I believe this does the same thing as what you want:
https://github.com/hvr/base-noprelude/blob/pre-ghc710/Setup.hs
HTH,
Adam
On Sat, Nov 28, 2015 at 4:23 PM, Thomas Lippincott wrote: Hello, I'm seeing what I think is some strange (or at least, non-intuitive)
behavior in a custom package, and was wondering if someone could point me
in the right direction. Basically, I need the build process to generate
some additional exposed modules, i.e. add them to the "exposed-modules"
variable, and create the corresponding source files. It's easy to get the
list of modules and produce the source files at any point in the build
process (I know this is a questionable design, trying to do this as part of
Cabal, but suffice it to say there are good arguments on both sides for our
particular situation). I'm *so* close to having it working perfectly: in fact, if I run "cabal
repl", I get a shell with all the right modules compiled and exposed, so,
it should work the same way if it's installed and imported in ghci, right?
Well, when I do that, the auto-generated modules are *not* exposed. It's
clearly generating the source files and compiling them, maybe "cabal
install" isn't getting the updated module list or something? Here's what
I'm doing: I override "confHook" to call the original configure function, but then
get the list of auto-generated modules and add them to the exposedModules
field in the Library structure nested in the LocalBuildInfo structure
before returning it. The idea is that I've intercepted the list of exposed
modules as early as possible, and so it's as though the Cabal file had the
auto-generated modules listed from the start. I generate the actual source
files by overriding "preBuild". Nothing else is modified from the default
simpleUserHooks. This probably isn't the place for "how do I..." questions, so I'll frame
it as: why would "cabal repl" work, and "cabal install" and ghci+import not
work? I apologize if this is an inappropriate place to ask, but there
aren't exactly a ton of Cabal experts floating around! Thanks for any help, -Tom
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