Add new script for generating test images.

Changelog: None

Signed-off-by: Kristian Amlie <kristian.amlie@northern.tech>

configs/debian-qemux86-64_config

@@ -2,8 +2,7 @@
 #
 # The image is generated with the following command:
 #
-#    mkosi --root-size=2G --distribution=debian --release=bullseye --format=gpt_ext4 --bootable --checksum
-#          --password password --package=openssh-server,dhcpcd5 --output=Debian-11-x86-64.img build
+# mender-convert/scripts/test/generate-image.sh debian
 #
 # Then manually uploaded to Mender's AWS S3 bucket for CI testing
 #

configs/ubuntu-qemux86-64_config

@@ -2,8 +2,7 @@
 #
 # The image is generated with the following command:
 #
-#    mkosi --root-size=2G --distribution=ubuntu --release=focal --format=gpt_ext4 --bootable --checksum
-#          --password password --package=openssh-server,dhcpcd5 --output=Ubuntu-Focal-x86-64.img build
+# mender-convert/scripts/test/generate-image.sh ubuntu
 #
 # Then manually uploaded to Mender's AWS S3 bucket for CI testing
 #

scripts/test/generate-image.sh

@@ -0,0 +1,169 @@
+#!/bin/bash
+
+set -e
+
+usage() {
+    cat 1>&2 <<EOF
+Please run with either "debian" or "ubuntu" as argument.
+EOF
+}
+
+if [ "$UID" -ne 0 ]; then
+    echo "We'll need root for this..." 1>&2
+    exec sudo "$0" "$@"
+fi
+
+while [ -n "$1" ]; do
+    case "$1" in
+        "ubuntu")
+            GENERATE_VARIANT=generate_ubuntu
+            ;;
+        "debian")
+            GENERATE_VARIANT=generate_debian
+            ;;
+        *)
+            usage
+            exit 1
+            ;;
+    esac
+    shift
+done
+
+cleanup_losetup() {
+    set +e
+    for dev in ${LO_DEVICE}p*; do
+        umount $dev
+    done
+    losetup -d $LO_DEVICE
+    rmdir tmp-p1
+    rmdir tmp-p2
+}
+
+generate_debian() {
+    local -r image="Debian-11-x86-64.img"
+
+    mkosi --root-size=2G --distribution=debian --release=bullseye --format=gpt_ext4 --bootable --checksum \
+          --password password --package=openssh-server,dhcpcd5 --package grub-efi-amd64-signed \
+          --package shim-signed --package lsb-release --output="$image" build
+
+    post_process_image "$image"
+
+    echo "Image successfully generated!" 1>&2
+}
+
+generate_ubuntu() {
+    local -r image="Ubuntu-Focal-x86-64.img"
+
+    mkosi --root-size=2G --distribution=ubuntu --release=focal --format=gpt_ext4 --bootable --checksum \
+          --password password --package=openssh-server,dhcpcd5 --package grub-efi-amd64-signed \
+          --package shim-signed --package lsb-release --output="$image" build
+
+    post_process_image "$image"
+
+    echo "Image successfully generated!" 1>&2
+}
+
+post_process_image() {
+    local -r image="$1"
+
+    mkdir -p tmp-p1
+    mkdir -p tmp-p2
+
+    LO_DEVICE=$(losetup --find --show --partscan "$image")
+    trap cleanup_losetup EXIT
+    mount ${LO_DEVICE}p1 tmp-p1
+    mount ${LO_DEVICE}p2 tmp-p2
+
+    pre_tweaks tmp-p1 tmp-p2
+
+    create_grub_regeneration_service tmp-p1 tmp-p2
+    umount tmp-p1
+    umount tmp-p2
+    regenerate_grub_live "$image"
+    mount ${LO_DEVICE}p1 tmp-p1
+    mount ${LO_DEVICE}p2 tmp-p2
+
+    post_tweaks tmp-p1 tmp-p2
+}
+
+pre_tweaks() {
+    local -r boot="$1"
+    local -r root="$2"
+
+    # Fstab is missing for some reason. I'm not exactly sure why systemd-boot
+    # works without this, and GRUB doesn't.
+    cat > "$root/etc/fstab" <<EOF
+/dev/root / auto defaults 0 0
+/dev/sda1 /boot/efi auto defaults 0 0
+EOF
+
+    # Real installers create a /etc/default/grub file with a distributor in
+    # them.
+    if [ ! -e "$root/etc/default/grub" ]; then
+        mkdir -p $root/etc/default
+        echo 'GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null`' > $root/etc/default/grub
+    fi
+
+    sed -E -i -e 's/^#? *PermitRootLogin .*/PermitRootLogin yes/' $root/etc/ssh/sshd_config
+}
+
+post_tweaks() {
+    local -r boot="$1"
+    local -r root="$2"
+
+    # Delete systemd-boot, which isn't normally present in images that were
+    # installed with OS installers, at least not at the time of writing.
+    rm -rf "$boot/EFI/systemd"
+
+    # Also replace bootx64.efi, which is the default bootloader. Mkosi installs
+    # systemd-bootx86.efi, but we want the shim.
+    rm -f "$boot/EFI/BOOT/*"
+    mkdir -p "$boot/EFI/BOOT"
+    cp "$root/usr/lib/shim/shimx64.efi.signed" "$boot/EFI/BOOT/BOOTX64.EFI"
+}
+
+# Unfortunately installing grub scripts is something which is not really
+# possible when offline. This is something which is easier with systemd-boot, so
+# longterm GRUB will probably follow, or systemd-boot will take over. Anyway,
+# let's do it by using a systemd service to perform the job, and then shut down.
+create_grub_regeneration_service() {
+    local -r boot="$1"
+    local -r root="$2"
+
+    cat > "$root/etc/systemd/system/mender-regenerate-grub-and-shutdown.service" <<EOF
+[Unit]
+Description=Regenerate grub scripts, disable itself and then shut down.
+
+[Service]
+Type=oneshot
+ExecStart=sh -c "grub-install && update-grub && systemctl disable mender-regenerate-grub-and-shutdown.service && poweroff"
+EOF
+
+    ln -sf "$root/etc/systemd/system/mender-regenerate-grub-and-shutdown.service" "$root/etc/systemd/system/multi-user.target.wants/"
+}
+
+regenerate_grub_live() {
+    local -r image="$1"
+
+    local -r nvvars=$(mktemp)
+    dd if=/dev/zero of="$nvvars" bs=1M count=1
+
+    local ret=0
+    for maybe_kvm in -enable-kvm ""; do
+        ret=0
+        echo "Generating GRUB boot files live..." 1>&2
+        qemu-system-x86_64 \
+            $maybe_kvm \
+            -drive file="$image",if=ide,format=raw \
+            -drive file=/usr/share/OVMF/OVMF_CODE.fd,if=pflash,format=raw,unit=0,readonly=on \
+            -drive file="$nvvars",if=pflash,format=raw,unit=1 \
+            -display vnc=:23 \
+            -m 512 \
+            || ret=$?
+        [ $ret -eq 0 ] && break
+    done
+
+    return $ret
+}
+
+$GENERATE_VARIANT