Add image for the silabs firmware flasher

.github/workflows/universal-silabs-flasher.yml

@@ -0,0 +1,51 @@
+---
+name: Build Universal Silabs Flasher
+
+on: # yamllint disable-line rule:truthy
+  push:
+    branches:
+      - main
+    paths:
+      - .github/workflows/universal-silabs-flasher.yml
+      - images/universal-silabs-flasher/**
+  pull_request:
+    branches:
+      - main
+    paths:
+      - .github/workflows/universal-silabs-flasher.yml
+      - images/universal-silabs-flasher/**
+
+jobs:
+  build-container:
+    env:
+      EARTHLY_TOKEN: ${{ secrets.EARTHLY_TOKEN }}
+      EARTHLY_ORG: marinatedconcrete
+      EARTHLY_SATELLITE: config-repo
+    runs-on: "ubuntu-latest"
+    permissions:
+      contents: "read"
+      packages: "write"
+
+    steps:
+      - uses: earthly/actions-setup@v1.0.8
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          # renovate: datasource=docker depName=earthly/earthly
+          version: "v0.7.22"
+      - uses: "actions/checkout@v4.1.1"
+
+      - name: "Login to GitHub Container Hub"
+        run: docker login --username "${{ github.actor }}" --password "${{ secrets.GITHUB_TOKEN }}" ghcr.io
+
+      - id: tags
+        run: echo "TAG=$BRANCH" | tr / _ >> "$GITHUB_ENV"
+        env:
+          BRANCH: ${{ github.event_name != 'pull_request' && 'latest' || format('pr-{0}', github.head_ref) }}
+
+      - name: "Build Universal Silabs Flasher"
+        run: earthly ./images/universal-silabs-flasher/+image --TAG=$TAG
+        env:
+          EARTHLY_CI: true
+          EARTHLY_PUSH: true
+          # Only one platform per https://docs.earthly.dev/docs/earthly-command#build-options
+          EARTHLY_PLATFORMS: linux/amd64

images/Earthfile

@@ -4,4 +4,5 @@ FROM alpine
 all:
     BUILD ./kairos-ubuntu-22-lts/+image
     BUILD ./kairos-zsh-bundle/+image
+    BUILD ./universal-silabs-flasher/+image
     BUILD ./usb-image/+image

images/universal-silabs-flasher/Earthfile

@@ -0,0 +1,15 @@
+VERSION 0.7
+# renovate: datasource=docker depName=python
+ARG PYTHON_VERSION=3.12.0-bullseye
+FROM python:$PYTHON_VERSION
+
+image:
+    COPY requirements.txt .
+    RUN pip install -r requirements.txt
+    # Firmware appears to be unversioned in a way that renovate can handle
+    ARG FIRMWARE_BRANCH='main'
+    RUN git clone https://github.com/NabuCasa/silabs-firmware.git --branch $FIRMWARE_BRANCH
+    ARG TAG='latest'
+    SAVE IMAGE --push ghcr.io/marinatedconcrete/universal-silabs-flasher:$TAG
+
+

images/universal-silabs-flasher/requirements.txt

@@ -0,0 +1,2 @@
+universal-silabs-flasher==0.0.15
+