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build: bake the rpi-lgpio build toolchain into the image #10

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Merged
ArnavVWadhwa merged 1 commit into from
Sep 1, 2026
Merged

build: bake the rpi-lgpio build toolchain into the image #10

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1 change: 1 addition & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,7 @@ Current contents:

- core: `git`, `curl`, `ca-certificates`
- I2C: `i2c-tools`
- rpi-lgpio build toolchain (lgpio compiles from source at `uv sync`): `swig`, `python3-dev`, `liblgpio-dev`
- kivy runtime: `libsdl2-2.0-0`, `libsdl2-image-2.0-0`, `libsdl2-mixer-2.0-0`, `libsdl2-ttf-2.0-0`, `libmtdev1`, `libgl1-mesa-dri`
- mDNS resolution: `libnss-mdns`

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17 changes: 14 additions & 3 deletions packages.txt
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Expand Up @@ -2,8 +2,10 @@
# ----------------------------------------------------------------------
# NON-Python OS packages ONLY. Every Python library (kivy, pidev, dpeaDPi,
# RPi.GPIO, spidev, smbus2, adafruit-*) is a per-repo uv dependency declared in
# that repo's pyproject.toml. apt python3-* packages do NOT populate a uv venv,
# so they never belong here.
# that repo's pyproject.toml. apt python3-* LIBRARY packages do NOT populate a uv
# venv, so they never belong here. The lone exception is build tooling: python3-dev
# ships the CPython headers used to COMPILE a C extension (e.g. lgpio) into a venv,
# it is not itself a venv library.
#
# Read during the image build (build-image.sh copies it in, customize.sh installs
# it). Lines starting with # and blank lines are ignored. Keep this list
Expand All @@ -14,9 +16,18 @@ git
curl
ca-certificates

# --- I2C / SPI bus tooling (SlushEngine + DPi boards) ---
# --- I2C bus tooling (SlushEngine + DPi boards; SPI is left off, see customize.sh) ---
i2c-tools

# --- rpi-lgpio build toolchain (DPi boards) ---
# dpeaDPi imports RPi.GPIO, provided on modern Pi OS / Python 3.13 by rpi-lgpio,
# whose lgpio dep has no aarch64 cp313 wheel and so compiles from source at
# `uv sync` time. swig + python3-dev build the C extension, liblgpio-dev links it
# (and pulls the runtime liblgpio shared lib). See the python3-dev note up top.
swig
python3-dev
liblgpio-dev

# --- kivy runtime: SDL2 + multitouch + GL (the kivy wheel links these at runtime) ---
libsdl2-2.0-0
libsdl2-image-2.0-0
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