Selective update of depencencies

[depau]

It's quite annoying to wait for the recompilation of everything, including the slower Python, while the only thing that needs to be update is kivy. I think that the update argument should use this syntax:

--update all     # current behavior of update
--update module  # update just that module and then do all the other stuff (e.g. build the apk)

# for example:
--update kivy

Is it possible?

[tito]

There is multiples things to take in account:

• after the distribution is built, the toolchain is cleaned to save disk space (as requested by some users). We need to not do it by default i guess, and do it only when "buildozer clean" is invoked.
• it's hard to determine what and how it should be updated. Updating kivy itself may require an update of python-for-android
• it's really depending of the toolchain behind i guess. python-for-android can force an update of a specific module. But for the others, it's not possible. It it's about virtualenv, then special option can be passed.

It should'nt be slower if you have ccache installed on your system :)

[depau]

No I don't think I have ccache, but if you say that it helps I'll run and install it :)
The purpose of my request is this: I forked deflectouch, and to solve some random crashes due to some of my changes I also forked kivy stable and added some try-excepts in some modules preventing it to make the whole app crash. The problem is that I have to try it directly on android, because the problem occurs only on android.
It happens that I make syntax errors, or forget an import somewhere; modifying the files in python-install to fix it quickly doesn't work, and the only way I found to make it work is actually removing all the dist directory so that it downloads '''everything''' again. In a few words I have to wait 10 minutes before I hear the music coming from my tablet or an exception in the logcat. That sucks very much! That's why I'd like to have a way to force the re-download and re-compilation of just a specific module.

[tito]

Yes, really, just install ccache. We handle the rest.
You might even reduce more the compilation time using the env CCACHE_COMPILERCHECK=content. On my computer, a recompilation from scratch is 1m30. On a cloud builder, it's around 2m10.

Or, go into the toolchain and update the lib you want yourself :)