Use micropython-uncrustify from pypi instead of apt package

[dhalbert]

MicroPython depends on a particular version of uncrustify to format its C code. This version is available from https://launchpad.net/~pybricks/+archive/ubuntu/ppa, but not for Ubuntu 24.04. A .deb from a previous version could be installed, but that's not necessarily a long-term solution. (The long-term solution is to update to a newer version of uncrustify.)

See https://github.com/orgs/micropython/discussions/14496 for background.

The maintainer of that PPA has now created a PyPi package for that version of uncrustify: https://pypi.org/project/micropython-uncrustify/. The repo for that is here: https://github.com/dlech/micropython-uncrustify.

This PR switches to installing that uncrustify by putting it in requirements-dev.txt.

If and when MicroPython switches to a newer uncrustify, we can undo this.

[dhalbert]

I'm mystified why builds were working before without the setuptools in requirements-dev.txt. But adding that fixes a problem with the silabs builds.

[jepler]

Makes sense. Do docs or learn need to be updated too?

[dhalbert]

Do docs or learn need to be updated too?

Worth checking. I looked, and not that I can see. uncrustify is only used in this repo.

[jepler]

it was specifically https://learn.adafruit.com/building-circuitpython/linux#install-build-tools-on-ubuntu-2986713 that I wondered about, but you must have updated it already. thanks!

[jepler]

there may be a couple of references left in the source tree to the apt/dpkg-based installation method:

origin/main:.devcontainer/common_tools.sh:sudo apt-get -y install uncrustify mtools
origin/main:ports/silabs/README.md:    sudo apt install default-jre gcc-arm-none-eabi wget python3 python3-pip git git-lfs gettext uncrustify