define "execute some code"?

I have to tweak expansion time state for some macros

that doesn't sound like a good idea?

the set of sources that will be recompiled you can get by inspecting :build-sources, which is a vector of resource-ids. if there is a corresponding (get-in build-state [:output resource-id]) it won't be recompiled. otherwise it will be

maybe 🙂 but I cannot think of an alternative, I've got an atom that hold some kind of environment to be used in expansions depending on the targetting platform.

that sound really bad 😛

haha but really fun

if you want to expand on what you trying to do I can maybe make suggestions

an atom is not tracked or restored with caching in mind

so builds may become unpredictable with the state of the atom and cache in mind. unless of course you disable all caching, which again is really bad 😉

Yes disable caching entirely sound like a bad idea on the long run

oh and you can get more information about the source that is getting recompiled via (get-in build-state [:sources resource-id])

but I repeat that any side-effected state during compilation is not a good idea 😉

The issue is on hot-reloading only

Yes but I cannot find a better way to do what I want for now. I will try to explain what I'm trying to achieve better in order for you to be able to do wise suggestions 🙂

It is a library that aims to let me define and implement protocols in a cross-platform way (clj and cljs) without reader conditionals. For being able to do this I need to keep track of which type implements which methods and things like this. It is clearly a bad idea but its almost done and I would like to fix this hot-reloading issue (on the first compilation everything works) .

hmm but how do you track protocol implementations? I mean how would you "find" reify?

I'm not tracking reified things and do not intend to do so, I do not track already existing protocols neither. When a new method is defined using one of my macro, I capture all informations in my expansion-time state. In addition to that, I store all "prototypes" in a runtime atom, that can be used to share method implementations. Its kind of baroque I agree but I works like I want for now.

I think that the information that you gave to me will allow me do what I need, so thank you a lot !