✨ feat: Add package docker-to-rootfs (#121)

This package will handle creating the rootfs needed by CrosVM

> More info incoming

packages/docker-to-rootfs/make.sh

@@ -0,0 +1,112 @@
+#!/bin/bash
+
+# Define colors
+COL_RED="\033[0;31m"
+COL_GRN="\033[0;32m"
+COL_END="\033[0m"
+
+# Get current user and group IDs
+USER_ID=$(id -u)
+GROUP_ID=$(id -g)
+
+# Set default disk size
+VM_DISK_SIZE_MB=${VM_DISK_SIZE_MB:-4096}
+
+# Set repository name
+REPO="nestri"
+
+# Function to create a tar archive from a Docker image
+create_tar() {
+  local name=$1
+  echo -e "\n${COL_GRN}[Dump $name directory structure to tar archive]${COL_END}"
+  docker export -o $name.tar $(docker run -d $name /bin/true)
+}
+
+# Function to extract a tar archive
+extract_tar() {
+  local name=$1
+  echo -e "\n${COL_GRN}[Extract $name tar archive]${COL_END}"
+  docker run -it \
+    -v $(pwd):/os:rw \
+    $REPO/builder bash -c "mkdir -p /os/$name.dir && tar -C /os/$name.dir --numeric-owner -xf /os/$name.tar"
+}
+
+# Function to create a disk image
+create_image() {
+  local name=$1
+  echo -e "\n${COL_GRN}[Create $name disk image]${COL_END}"
+  docker run -it \
+    -v $(pwd):/os:rw \
+    -e DISTR=$name \
+    --privileged \
+    --cap-add SYS_ADMIN \
+    $REPO/builder bash /os/create_image.sh $USER_ID $GROUP_ID $VM_DISK_SIZE_MB
+}
+
+# Function to ensure builder is ready
+ensure_builder() {
+  echo -e "\n${COL_GRN}[Ensure builder is ready]${COL_END}"
+  if [ "$(docker images -q $REPO/builder)" = '' ]; then
+    docker build -f Dockerfile -t $REPO/builder .
+  fi
+}
+
+# Function to run builder interactively
+run_builder_interactive() {
+  docker run -it \
+    -v $(pwd):/os:rw \
+    --cap-add SYS_ADMIN \
+    $REPO/builder bash
+}
+
+# Function to clean up
+clean_up() {
+  echo -e "\n${COL_GRN}[Remove leftovers]${COL_END}"
+  rm -rf mnt debian.* alpine.* ubuntu.*
+  clean_docker_procs
+  clean_docker_images
+}
+
+# Function to clean Docker processes
+clean_docker_procs() {
+  echo -e "\n${COL_GRN}[Remove Docker Processes]${COL_END}"
+  if [ "$(docker ps -qa -f=label=com.iximiuz-project=$REPO)" != '' ]; then
+    docker rm $(docker ps -qa -f=label=com.iximiuz-project=$REPO)
+  else
+    echo "<noop>"
+  fi
+}
+
+# Function to clean Docker images
+clean_docker_images() {
+  echo -e "\n${COL_GRN}[Remove Docker Images]${COL_END}"
+  if [ "$(docker images -q $REPO/*)" != '' ]; then
+    docker rmi $(docker images -q $REPO/*)
+  else
+    echo "<noop>"
+  fi
+}
+
+# Main script
+if [ $# -lt 1 ]; then
+  echo "Usage: $0 <image_name> [clean|builder-interactive]"
+  exit 1
+fi
+
+IMAGE_NAME=$1
+
+case $2 in
+  builder-interactive)
+    run_builder_interactive
+    ;;
+  clean)
+    clean_up
+    ;;
+esac
+
+ensure_builder
+create_tar $IMAGE_NAME
+extract_tar $IMAGE_NAME
+create_image $IMAGE_NAME
+
+# Extract kernel `` virt-builder --get-kernel "${IMAGE_NAME}.img" -o . ``