Pin base image to Raspberry Pi OS Trixie

.github/workflows/validate.yml

@@ -21,10 +21,10 @@ jobs:
     runs-on: ubuntu-24.04-arm      # native arm64 container
     steps:
       - uses: actions/checkout@v4
-      - name: Run customize.sh in an arm64 Bookworm container and assert
+      - name: Run customize.sh in an arm64 Trixie container and assert
         run: |
           docker run --rm -v "$PWD:/src" \
-            arm64v8/debian:bookworm bash -euo pipefail -c '
+            arm64v8/debian:trixie bash -euo pipefail -c '
               apt-get update
               apt-get install -y --no-install-recommends curl ca-certificates iproute2 procps dbus
               mkdir -p /boot/firmware && : > /boot/firmware/config.txt

README.md

@@ -7,7 +7,7 @@ dependencies and installs them with `uv`.
 
 ## What the image bakes in
 
-- **OS**: Raspberry Pi OS Bookworm 64-bit (arm64), Desktop
+- **OS**: Raspberry Pi OS Trixie 64-bit (arm64), Desktop
 - **Hardware**: I2C, SPI, and UART enabled. `dtoverlay=disable-bt` so
   `/dev/serial0` is the PL011 UART for the SlushEngine / DPi bus. `i2c-dev` loaded.
 - **Networking (`eth0`)**: DHCP for internet, plus an always-on static
@@ -50,7 +50,7 @@ a specific Raspberry Pi OS release for reproducibility.
 
 ### In CI, on every PR (`.github/workflows/validate.yml`)
 
-Runs `shellcheck`, then runs `customize.sh` inside an arm64 Bookworm container
+Runs `shellcheck`, then runs `customize.sh` inside an arm64 Trixie container
 and asserts what can be checked without hardware: `uv` present, the 5358 avahi
 `.deb` installed, the I2C/SPI/UART lines written, and the eth0 NetworkManager
 profile present. This gates merges to `main`.

build-image.sh

@@ -18,7 +18,7 @@ WORK="${WORK:-$HERE/.build}"
 
 # Stock Raspberry Pi OS (arm64, desktop). PIN a dated release for reproducibility;
 # check https://downloads.raspberrypi.com/raspios_arm64/images/ for the current one.
-BASE_URL="${BASE_URL:-https://downloads.raspberrypi.com/raspios_arm64/images/raspios_arm64-2025-05-13/2025-05-13-raspios-bookworm-arm64.img.xz}"
+BASE_URL="${BASE_URL:-https://downloads.raspberrypi.com/raspios_arm64/images/raspios_arm64-2026-06-19/2026-06-18-raspios-trixie-arm64.img.xz}"
 GROW_MB="${GROW_MB:-2048}"        # headroom for our added packages
 OUT_IMG="$WORK/dpea-pi-$(date +%Y%m%d).img"
 

lib/common.sh

@@ -3,7 +3,7 @@
 # Sourced by provision.sh to configure a running Pi. The image bakes the same
 # choices at build time via customize.sh.
 #
-# Target: Raspberry Pi OS Bookworm, 64-bit (aarch64).
+# Target: Raspberry Pi OS Trixie, 64-bit (aarch64).
 #
 # Layering rule:
 #   apt / packages.txt   -> NON-Python OS libraries only (SDL2, i2c-tools, ...).
@@ -31,7 +31,7 @@ dpea_install_packages() {
 
 dpea_enable_interfaces() {
   # I2C, SPI, and the serial *hardware* (not the login console). Needs a recent
-  # raspi-config (ships on Bookworm). In a build chroot, edit config.txt directly.
+  # raspi-config (ships on Raspberry Pi OS). In a build chroot, edit config.txt directly.
   raspi-config nonint do_i2c 0
   raspi-config nonint do_spi 0
   raspi-config nonint do_serial_hw 0

provision.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-# Provision a running DPEA Raspberry Pi from stock Raspberry Pi OS 64-bit (Bookworm).
+# Provision a running DPEA Raspberry Pi from stock Raspberry Pi OS 64-bit (Trixie).
 # Idempotent: safe to re-run. Run with sudo.
 #
 #   sudo ./provision.sh [--hostname arnav-pi]