first commit

.dockerignore

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+work
+

.github/workflows/build.yaml

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+name: build
+on: ["push", "pull_request"]
+jobs:
+  build:
+    name: build with docker
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Set env
+        run: |
+          echo "RELEASE_VERSION=${GITHUB_REF#refs/*/v}" >> $GITHUB_ENV
+          mkdir -p build
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      - name: Build
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          file: Dockerfile
+          outputs: type=tar,dest=build/image.tar
+      - name: Unpack image
+        run: |
+          cd build && tar -xf image.tar
+          sha256sum *
+      - name: Release
+        uses: softprops/action-gh-release@v1
+        if: startsWith(github.ref, 'refs/tags/')
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          files: |
+            build/*.iso
+

Dockerfile

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+FROM ubuntu:20.04 as builder
+ARG DEBIAN_FRONTEND=noninteractive
+
+############################## Make ROOTFS ##############################
+
+# Runtime Environment
+RUN apt-get update && \
+    apt-get install -y \
+    ca-certificates bash curl wget time \
+    tar xz-utils gzip squashfs-tools dosfstools \
+    xorriso \
+    isolinux \
+    syslinux-efi \
+    mtools bash
+
+COPY [ "alpine-chroot-install", "/opt/alpine-chroot-install" ]
+
+ARG TARGET_ARCH=x86_64
+
+RUN PACKAGES="bash ca-certificates curl gawk blkid util-linux mkinitfs efibootmgr dosfstools ethtool iproute2 dhcpcd sed wget tar xz gzip openssh-client openssh-server openssh-sftp-server linux-lts linux-firmware-none grub grub-bios grub-efi" && \
+    mkdir -p /work/rootfs && \
+    chmod +x /opt/alpine-chroot-install && \
+    /opt/alpine-chroot-install \
+    -a "${TARGET_ARCH}" \
+    -b v3.13 \
+    -p "${PACKAGES}" \
+    -d /work/rootfs && \
+    mkdir -p /work/rootfs/tmp/pkg/${TARGET_ARCH}
+
+COPY [ "target-install.sh", "/work/rootfs/tmp/target-install.sh" ]
+
+RUN chmod +x /work/rootfs/tmp/target-install.sh && \
+    /work/rootfs/enter-chroot /tmp/target-install.sh && \
+    rm -rf /work/rootfs/tmp/*
+
+RUN time mksquashfs /work/rootfs /work/rootfs.sqfs -comp gzip -b 131072
+
+############################## Make ISO for development ##############################
+
+ARG ISO_WORKDIR=/work/iso
+RUN mkdir -p \
+    $ISO_WORKDIR/staging \
+    $ISO_WORKDIR/staging/isolinux \
+    $ISO_WORKDIR/staging/live \
+    $ISO_WORKDIR/staging/target \
+    $ISO_WORKDIR/staging/boot && \
+    cp /work/rootfs.sqfs $ISO_WORKDIR/staging/rootfs.sqfs
+
+COPY [ "initramfs-ramroot.sh", "/work/rootfs/tmp/initramfs-ramroot.sh" ]
+RUN chmod +x /work/rootfs/tmp/initramfs-ramroot.sh && \
+    /work/rootfs/enter-chroot mkinitfs \
+    -C gzip \
+    -F "ata base cdrom ext4 keymap scsi squashfs" \
+    -i "/tmp/initramfs-ramroot.sh" \
+    -b / \
+    $(ls /work/rootfs/lib/modules/ | head -n 1) && \
+    cp /work/rootfs/boot/vmlinuz-* $ISO_WORKDIR/staging/live/vmlinuz && \    
+    cp /work/rootfs/boot/initramfs-* $ISO_WORKDIR/staging/live/initrd
+
+COPY [ "isolinux.cfg", "/tmp/" ]
+RUN cp /usr/lib/ISOLINUX/isolinux.bin $ISO_WORKDIR/staging/isolinux/ && \
+    cp /usr/lib/syslinux/modules/bios/* $ISO_WORKDIR/staging/isolinux/ && \
+    cp /tmp/isolinux.cfg $ISO_WORKDIR/staging/isolinux/
+
+RUN xorriso \
+    -as mkisofs \
+    -iso-level 3 \
+    -o "/work/pe.iso" \
+    -full-iso9660-filenames \
+    -volid "alpine-live" \
+    -isohybrid-mbr /usr/lib/ISOLINUX/isohdpfx.bin \
+    -eltorito-boot \
+        isolinux/isolinux.bin \
+        -no-emul-boot \
+        -boot-load-size 4 \
+        -boot-info-table \
+        --eltorito-catalog isolinux/isolinux.cat \
+    "$ISO_WORKDIR/staging"
+
+FROM scratch
+COPY --from=builder [ "/work/pe.iso", "/" ]
+