Initial release

tools/pjarczak_bambu_runtime/rootfs/build_windows_wsl_rootfs.sh

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)"
+OUTPUT_TAR="${1:-$SCRIPT_DIR/windows-wsl2-rootfs.tar}"
+BASE_IMAGE="${PJARCZAK_WSL_ROOTFS_IMAGE:-ubuntu:24.04}"
+
+if ! command -v docker >/dev/null 2>&1; then
+    echo "docker not found. Install Docker or provide a prebuilt windows-wsl2-rootfs.tar." >&2
+    exit 1
+fi
+
+mkdir -p "$(dirname -- "$OUTPUT_TAR")"
+
+CONTAINER_NAME="pjarczak-bambu-rootfs-$(date +%s)-$$"
+cleanup() {
+    docker rm -f "$CONTAINER_NAME" >/dev/null 2>&1 || true
+}
+trap cleanup EXIT
+
+docker pull "$BASE_IMAGE" >/dev/null
+docker create --name "$CONTAINER_NAME" "$BASE_IMAGE" /bin/sh -lc 'exit 0' >/dev/null
+
+rm -f "$OUTPUT_TAR"
+docker export "$CONTAINER_NAME" -o "$OUTPUT_TAR"
+
+if [[ ! -s "$OUTPUT_TAR" ]]; then
+    echo "failed to create rootfs tar: $OUTPUT_TAR" >&2
+    exit 1
+fi
+
+echo "WSL rootfs created:"
+echo "  $OUTPUT_TAR"