Add ubuntu-mini-iso project

debian/changelog

@@ -1,3 +1,9 @@
+livecd-rootfs (2.810) lunar; urgency=medium
+
+  * Add ubuntu-mini-iso build project.
+
+ -- Dan Bungert <daniel.bungert@canonical.com>  Mon, 06 Mar 2023 08:17:11 -0700
+
 livecd-rootfs (2.809) lunar; urgency=medium
 
   * Do not use the ubuntucinnamon-desktop task for cinnamon builds, it doesn't

debian/control

@@ -40,6 +40,7 @@ Depends: ${misc:Depends},
          u-boot-tools [armhf arm64],
          ubuntu-image [!i386 !riscv64],
          python3-vmdkstream [amd64 i386],
+         xorriso,
          xz-utils,
          zerofree
 Breaks: ubuntu-defaults-builder (<< 0.32)

live-build/auto/config

@@ -342,7 +342,7 @@ if [ -z "${IMAGEFORMAT:-}" ]; then
 					;;
 			esac
 			;;
-		ubuntu-server:live)
+		ubuntu-server:live|ubuntu-mini-iso:)
 			IMAGEFORMAT=plain
 			;;
 	esac
@@ -377,6 +377,8 @@ case $IMAGEFORMAT in
 			ubuntu-server:live)
 	                        touch config/universe-enabled
 				;;
+			ubuntu-mini-iso:)
+				;;
 			*)
 				PREINSTALLED=true
 				;;
@@ -591,7 +593,7 @@ if [ "$PREINSTALLED" = "true" ]; then
 		ubuntu-server)
 			add_package live oem-config-debconf ubiquity-frontend-debconf
 			;;
-		ubuntu-base|ubuntu-oci|ubuntu-cpc|ubuntu-wsl)
+		ubuntu-base|ubuntu-oci|ubuntu-cpc|ubuntu-wsl|ubuntu-mini-iso)
 			;;
 		ubuntu)
 			add_package live oem-config-gtk ubiquity-frontend-gtk
@@ -655,7 +657,7 @@ case $PROJECT in
 esac
 
 case $PROJECT in
-	ubuntu-server)
+	ubuntu-server|ubuntu-mini-iso)
 		COMPONENTS='main'
 		;;
 	kubuntu|kubuntu-dvd|kubuntu-plasma5|edubuntu|ubuntu-gnome|ubuntu-budgie|ubuntukylin|ubuntucinnamon)
@@ -938,6 +940,25 @@ case $PROJECT in
 		PREINSTALL_POOL_SEEDS='server-ship'
 		;;
 
+	ubuntu-mini-iso)
+		OPTS="${OPTS:+$OPTS }--bootstrap-flavour=minimal"
+
+		OPTS="${OPTS:+$OPTS }--linux-packages=none --initramfs=none"
+		KERNEL_FLAVOURS=none
+		BINARY_REMOVE_LINUX=false
+
+		add_package install mini-iso-tools openssl ca-certificates isc-dhcp-client linux-generic
+		case $ARCH in
+			amd64)
+				add_package install cd-boot-images-amd64
+				;;
+			*)
+				echo "unexpected architecture for $PROJECT: '$ARCH'"
+				exit 1
+				;;
+		esac
+		;;
+
 	ubuntu-base)
 		OPTS="${OPTS:+$OPTS }--bootstrap-flavour=minimal"
 		;;
@@ -1064,7 +1085,7 @@ case $PROJECT:${SUBPROJECT:-} in
 	ubuntu-server:live)
 		BASE_SEED='server'
 		;;
-	ubuntu-base:*|ubuntu-core:*)
+	ubuntu-base:*|ubuntu-core:*|ubuntu-mini-iso:)
 		;;
 	ubuntu-oci:*)
 		;;
@@ -1237,7 +1258,7 @@ if [ "${IMAGE_HAS_HARDCODED_PASSWORD:-}" = "1" ]; then
 fi
 
 case $PROJECT in
-  ubuntu-cpc|ubuntu-core|ubuntu-base|ubuntu-oci|ubuntu-wsl)
+  ubuntu-cpc|ubuntu-core|ubuntu-base|ubuntu-oci|ubuntu-wsl|ubuntu-mini-iso)
     # ubuntu-cpc gets this added in 025-create-groups.chroot, and we do
     # not want this group in projects that are effectively just chroots
     ;;
@@ -1396,7 +1417,7 @@ EOF
 		fi
 		;;
 
-	ubuntu-cpc:*|ubuntu-server:live|ubuntu:desktop-preinstalled|ubuntu-wsl:*)
+	ubuntu-cpc:*|ubuntu-server:live|ubuntu:desktop-preinstalled|ubuntu-wsl:*|ubuntu-mini-iso:*)
 		# Ensure that most things e.g. includes.chroot are copied as is
 		for entry in /usr/share/livecd-rootfs/live-build/${PROJECT}/*; do
 			case $entry in

live-build/ubuntu-mini-iso/hooks/01-mini-iso.binary

@@ -0,0 +1,77 @@
+#!/bin/sh
+
+set -eu
+
+case $ARCH in
+    amd64)
+        ;;
+    *)
+        exit 0
+        ;;
+esac
+
+KERNEL=chroot/boot/vmlinuz
+INITRD=chroot/boot/initrd.img
+
+mkdir -p "chroot/etc/initramfs-tools/conf.d"
+cat > chroot/etc/initramfs-tools/conf.d/casperize.conf <<EOF
+export CASPER_GENERATE_UUID=1
+EOF
+
+chroot chroot update-initramfs -u
+
+case $ARCH in
+    amd64)
+        mkdir -p "ubuntu-mini-iso/amd64"
+        cp -a chroot/usr/share/cd-boot-images-amd64/tree ubuntu-mini-iso/amd64/tree
+        cp -a chroot/usr/share/cd-boot-images-amd64/images ubuntu-mini-iso/amd64/images
+        mkdir -p "ubuntu-mini-iso/amd64/tree/casper"
+        cp "$KERNEL" ubuntu-mini-iso/amd64/tree/casper/vmlinuz
+        cp "$INITRD" ubuntu-mini-iso/amd64/tree/casper/initrd
+        mkdir -p "ubuntu-mini-iso/amd64/tree/boot/grub"
+        cat > ubuntu-mini-iso/amd64/tree/boot/grub/grub.cfg <<EOF
+menuentry "Choose an Ubuntu version to install" {
+        set gfxpayload=keep
+        linux /casper/vmlinuz iso-chooser-menu ip=dhcp ---
+        initrd /casper/initrd
+}
+EOF
+        ;;
+esac
+
+mkdir -p ubuntu-mini-iso/$ARCH/tree/.disk
+
+touch ubuntu-mini-iso/$ARCH/tree/.disk/base_installable
+
+tmpdir=$(mktemp -d)
+unmkinitramfs $INITRD $tmpdir
+if [ -e "$tmpdir/main/conf/uuid.conf" ]; then
+    uuid_conf="$tmpdir/main/conf/uuid.conf"
+elif [ -e "$tmpdir/conf/uuid.conf" ]; then
+    uuid_conf="$tmpdir/conf/uuid.conf"
+else
+    echo "uuid.conf not found"
+    exit 1
+fi
+cp "$uuid_conf" ubuntu-mini-iso/$ARCH/tree/.disk/casper-uuid-generic
+rm -fr $tmpdir
+
+cat > ubuntu-mini-iso/$ARCH/tree/.disk/cd_type <<EOF
+full_cd/single
+EOF
+
+version=$(distro-info --fullname --series=$SUITE \
+          | sed s'/^Ubuntu/ubuntu-mini-iso/')
+
+cat > ubuntu-mini-iso/$ARCH/tree/.disk/info <<EOF
+$version - $ARCH ($NOW)
+EOF
+
+dest="${PWD}/livecd.${PROJECT}.ubuntu-mini.iso"
+xorriso="$(cat chroot/usr/share/cd-boot-images-amd64/xorriso-cmd.txt)"
+
+cd ubuntu-mini-iso/$ARCH
+$xorriso -o $dest
+cd ../..
+
+rm -rf ubuntu-mini-iso