pipeline for building pi image

Author: donbing

.github/workflows/build-pi-image.yml

@@ -0,0 +1,38 @@
+# This workflow builds a Raspberry Pi image with Docker and Bitbot pre-installed
+# and uploads the bootable image as an artifact.
+
+name: Build Raspberry Pi Image
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [ main ]
+
+jobs:
+  build-pi-image:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y coreutils kpartx qemu-user-static debootstrap dosfstools rsync parted wget git
+
+      - name: Build Raspberry Pi image
+        run: |
+          cd build-image
+          sudo bash build.sh
+
+      - name: Upload image artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: bitbot-pi-image
+          path: build-image/output/bitbot-pi.img

.vscode/mcp.json

@@ -0,0 +1,7 @@
+{
+    "servers": {
+        "context7": {
+            "url": "https://mcp.context7.com/mcp"
+        }
+    }
+}

build-image/.gitignore

@@ -0,0 +1,3 @@
+# Directory for output image and mount point
+output/
+mnt/

build-image/build.sh

@@ -0,0 +1,53 @@
+#!/bin/bash
+# build.sh: Build a minimal Raspberry Pi OS image with Docker and Bitbot Docker Compose
+set -e
+
+IMG=output/bitbot-pi.img
+IMG_SIZE=4G
+MOUNT_DIR=mnt
+
+# Clean up previous build
+sudo umount -lf $MOUNT_DIR || true
+rm -rf $MOUNT_DIR output
+mkdir -p $MOUNT_DIR output
+
+# Download minimal Raspberry Pi OS Lite image
+wget -O output/rpi-os-lite.img https://downloads.raspberrypi.com/raspios_lite_armhf_latest
+
+# Extract the image
+mv output/rpi-os-lite.img $IMG
+
+# Mount the image
+LOOPDEV=$(sudo losetup -f --show $IMG)
+PART=$(sudo kpartx -av $LOOPDEV | grep -m1 'p2' | awk '{print $3}')
+sudo mount /dev/mapper/$PART $MOUNT_DIR
+
+# Copy Bitbot project and Docker Compose files
+sudo mkdir -p $MOUNT_DIR/home/pi/bitbot
+sudo rsync -a --exclude 'build-image' --exclude '.git' ../../ $MOUNT_DIR/home/pi/bitbot/
+
+# Install Docker and Docker Compose on first boot
+cat <<'EOF' | sudo tee $MOUNT_DIR/etc/rc.local > /dev/null
+#!/bin/bash
+# rc.local
+set -e
+if ! command -v docker &> /dev/null; then
+  curl -fsSL https://get.docker.com -o get-docker.sh
+  sh get-docker.sh
+  usermod -aG docker pi
+fi
+if ! command -v docker-compose &> /dev/null; then
+  pip3 install docker-compose
+fi
+cd /home/pi/bitbot
+/usr/local/bin/docker-compose up -d
+exit 0
+EOF
+sudo chmod +x $MOUNT_DIR/etc/rc.local
+
+# Unmount and clean up
+sudo umount $MOUNT_DIR
+sudo kpartx -d $LOOPDEV
+sudo losetup -d $LOOPDEV
+
+echo "Image ready: $IMG"