Add GitHub Actions test

.github/workflows/qemu.yml

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+name: sd-card-images CI
+
+on:
+  push:
+    branches: "*"
+  schedule:
+    - cron: "00 03 * * 0"
+
+env:
+  MAKEFLAGS: -j2
+
+jobs:
+  bullseye-x86:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Install dependencies
+      timeout-minutes: 5
+      env:
+        DEBIAN_FRONTEND: noninteractive
+      run: |
+        sudo apt-get update
+        sudo apt-get --assume-yes \
+                     --no-install-recommends \
+                     install bc \
+                             bison \
+                             bzip2 \
+                             ca-certificates \
+                             debian-archive-keyring \
+                             debootstrap \
+                             device-tree-compiler \
+                             dosfstools \
+                             e2fsprogs \
+                             flex \
+                             gcc \
+                             gcc-arm-none-eabi \
+                             gcc-i686-linux-gnu \
+                             git \
+                             libssl-dev \
+                             make \
+                             mtools \
+                             parted \
+                             pwgen \
+                             python2-dev \
+                             python3-dev \
+                             python3-pkg-resources \
+                             qemu-system-x86 \
+                             ssh \
+                             sshpass \
+                             swig
+
+    - name: Checkout
+      uses: actions/checkout@v2
+
+    - name: Build qemu_x86_virt
+      timeout-minutes: 5
+      run: |
+        env PATH=$GITHUB_WORKSPACE/scripts:$PATH \
+            ARTIFACTS_DIR=$RUNNER_TEMP \
+            build-boot qemu_x86_virt \
+                       qemu-x86 \
+                       qemu-x86_defconfig \
+                       i686-linux-gnu
+
+    - name: Build bullseye i386
+      timeout-minutes: 5
+      run: |
+        sudo env PATH=$GITHUB_WORKSPACE/scripts:$PATH \
+                 ARTIFACTS_DIR=$RUNNER_TEMP \
+                 build-debian debian \
+                              i386 \
+                              bullseye
+
+    - name: Test qemu_x86_virt + bullseye i386
+      timeout-minutes: 5
+      run: |
+        ./test/qemu.sh $RUNNER_TEMP/boot-qemu_x86_virt.bin.gz \
+                       $RUNNER_TEMP/debian-bullseye-i386-*.bin.gz

test/qemu.sh

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+#!/bin/bash
+# Boot up and shutdown
+
+BOOT="${1:-boot-qemu_aarch64_virt.bin.gz}"
+DEBIAN="${2:-debian-bullseye-arm64-XXXXXX.bin.gz}"
+
+set -ex
+
+# Parse out stuff
+IFS="-." read -a PARTS1 <<< `basename "${BOOT}"`
+BOARD="${PARTS1[1]}"
+echo "Using board ${BOARD}"
+
+# Parse out stuff
+IFS="-." read -a PARTS2 <<< `basename "${DEBIAN}"`
+ARCH="${PARTS2[2]}"
+SSHPASS="${PARTS2[3]}"
+echo "Using password ${SSHPASS}"
+
+# Build image
+zcat "${BOOT}" "${DEBIAN}" > image.bin
+
+# Extract U-Boot (u-boot.rom in x86 case)
+dd if=image.bin of=bios.bin count=2048 skip=16
+
+case "${BOARD}" in
+qemu*)
+	;;
+*)
+	echo "Unsupported \$BOARD: ${BOARD}"
+	exit 1
+	;;
+esac
+
+case "${ARCH}" in
+amd64)
+	QEMU_ARCH="x86_64"
+	QEMU_MACHINE="pc"
+	QEMU_CPU="qemu64"
+	;;
+i386)
+	QEMU_ARCH="i386"
+	QEMU_MACHINE="pc"
+	QEMU_CPU="qemu32"
+	;;
+arm64)
+	QEMU_ARCH="aarch64"
+	QEMU_MACHINE="virt"
+	QEMU_CPU="cortex-a53"
+	;;
+armhf)
+	QEMU_ARCH="arm"
+	QEMU_MACHINE="virt"
+	QEMU_CPU="cortex-a9"
+	;;
+*)
+	echo "Unknown \$ARCH: ${ARCH}"
+	exit 1
+	;;
+esac
+
+# Launch QEMU with U-Boot and image
+qemu-system-${QEMU_ARCH} -machine ${QEMU_MACHINE} \
+                         -cpu ${QEMU_CPU} \
+                         -m 512 \
+                         -bios bios.bin \
+                         -serial stdio \
+                         -no-reboot \
+                         -display none \
+                         -drive file=image.bin,format=raw,media=disk \
+                         -nic user,hostfwd=tcp:127.0.0.1:5555-:22 &
+
+sleep 15
+
+# Pass password to sshpass
+export SSHPASS
+
+# SSH into QEMU and shut it down
+until sshpass -e ssh -o "ConnectTimeout=5" \
+                     -o "StrictHostKeyChecking=no" \
+                     -o "UserKnownHostsFile=/dev/null" \
+                     -p 5555 \
+                     -q \
+                     root@localhost "sleep 5 && poweroff"; do
+	sleep 1
+done
+
+# Wait for QEMU to exit
+wait