Add BTRFS support

Author: Yury-MonZon

Dockerfile

@@ -22,6 +22,7 @@ RUN apt-get install -y \
     flex \
     parted \
     fdisk \
+    btrfs-progs \
     python3-dev \
     python3-libfdt \
     python3-setuptools \

README.md

@@ -119,7 +119,7 @@ sudo apt install git build-essential crossbuild-essential-arm64 bc bison flex \
 For assembling disk images — debos, bmaptool, and zeekstd all need to be installed from source:
 
 ```bash
-sudo apt install golang pipx pigz cargo parted fdisk mmdebstrap \
+sudo apt install golang pipx pigz cargo parted fdisk btrfs-progs mmdebstrap \
     systemd-resolved systemd-container qemu-user-binfmt \
     libglib2.0-dev libostree-dev fakemachine
 

build-images.sh

@@ -23,20 +23,10 @@ trap cleanup EXIT
 
 bmaptool copy "$IMG_OUT"/debian-rootfs.img.zst "$IMG_OUT"/debian-rootfs.img
 sync "$IMG_OUT"/debian-rootfs.img
-TMP=`mktemp`
-chmod 644 "$TMP"
 
 # Boot entries are pure BLS in /boot/loader/entries, read directly by U-Boot's
 # 'bls' bootmeth (no extlinux.conf). Nothing to rewrite here for the boot menu.
 
-debugfs -R "cat /usr/lib/os-release"  "$IMG_OUT"/debian-rootfs.img > "$TMP"
-echo "BUILD_ID=$BUILD_ID" >> "$TMP"
-debugfs -w -R "rm /usr/lib/os-release" "$IMG_OUT"/debian-rootfs.img
-debugfs -w -R "write $TMP /usr/lib/os-release" "$IMG_OUT"/debian-rootfs.img
-sync "$IMG_OUT"/debian-rootfs.img
-
-rm -f "$TMP"
-
 for s in 512 4096; do
 	echo "Creating images for $s-byte sector size"
 	truncate -s "$IMGSIZE" "$TMPDIR"/debian-"$s"-nobootloader-"$BUILD_ID".img

debian-rk3576-img.yaml

@@ -21,14 +21,18 @@ actions:
         start: 32KiB
         end: 64MiB
       - name: root
-        fs: ext4
+        fs: btrfs
         start: 64MiB
         end: -1MiB
-        flags: [ boot ]
     mountpoints:
       - mountpoint: /
         partition: root
-        options: [ x-systemd.growfs ]
+        options: [ compress=zstd, x-systemd.growfs ]
+
+  - action: run
+    description: Enable zstd compression on the image mount
+    chroot: false
+    command: mount -o remount,compress=zstd "$IMAGEMNTDIR"
 
   - action: filesystem-deploy
     append-kernel-cmdline: {{ $cmdline }}
@@ -43,3 +47,4 @@ actions:
     description: Install Linux kernel packages inside the target
     chroot: true
     command: find /var/cache/linux-kernel -name linux-image-\*.deb -a ! -name \*-dbg_\* -print0 | xargs -0 apt install -y
+