windows_in_docker/CLAUDE.md

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

This is dockur/windows - a Docker container that runs Windows inside QEMU with KVM acceleration. It provides automatic Windows installation with ISO downloading, VirtIO driver injection, and unattended setup via answer files.

Architecture

Entry Point & Script Chain

The container starts via /run/entry.sh which sources scripts in sequence:

1. start.sh → utils.sh → reset.sh → server.sh → define.sh → mido.sh → install.sh
2. Then: disk.sh → display.sh → network.sh → samba.sh → boot.sh → proc.sh → power.sh → memory.sh → config.sh → finish.sh
3. Finally launches qemu-system-x86_64 with constructed arguments

Key Components

• src/define.sh: Version parsing, language mapping, and Windows edition detection. Maps user-friendly version strings (e.g., "11", "10l", "2022") to internal identifiers
• src/mido.sh: Microsoft ISO downloader - scrapes Microsoft's download portal to get direct ISO links
• src/install.sh: ISO extraction, image detection, driver injection, answer file customization, and ISO rebuilding using wimlib-imagex and genisoimage
• src/samba.sh: Configures Samba for host-guest file sharing (appears as "Shared" folder on desktop)
• assets/*.xml: Unattended answer files for different Windows versions

Build System

• Base image: qemux/qemu (QEMU with web-based VNC viewer)
• VirtIO drivers downloaded at build time from qemus/virtiso-whql
• Multi-arch support: amd64 native, arm64 via dockur/windows-arm

Commands

Linting & Validation

# ShellCheck for all shell scripts
shellcheck -x --source-path=src src/*.sh

# Dockerfile linting
hadolint Dockerfile

# XML validation (answer files)
# Uses action-pack/valid-xml in CI

Building

# Build Docker image locally
docker build -t windows .

# Build with version argument
docker build --build-arg VERSION_ARG=1.0 -t windows .

Testing Locally

# Run container (requires KVM)
docker run -it --rm -e "VERSION=11" -p 8006:8006 --device=/dev/kvm --device=/dev/net/tun --cap-add NET_ADMIN -v "${PWD}/storage:/storage" windows

# Access web viewer at http://localhost:8006

CI/CD

• check.yml: Runs on PRs - ShellCheck, Hadolint, XML/JSON/YAML validation
• build.yml: Manual trigger - builds multi-arch image, pushes to Docker Hub and GHCR
• test.yml: Runs check.yml on PRs

ShellCheck exclusions (from CI): SC1091, SC2001, SC2002, SC2034, SC2064, SC2153, SC2317, SC2028

Key Environment Variables

Variable	Default	Description
VERSION	"11"	Windows version (11, 10, 10l, 2022, etc.) or ISO URL
LANGUAGE	"en"	Installation language
USERNAME	"Docker"	Windows username
PASSWORD	"admin"	Windows password
DISK_SIZE	"64G"	Virtual disk size
RAM_SIZE	"4G"	RAM allocation
CPU_CORES	"2"	CPU cores
MANUAL	""	Set to "Y" for manual installation

Adding New Windows Versions

1. Add version aliases in src/define.sh parseVersion() function
2. Create answer file in assets/ named {version}.xml
3. Add driver folder mapping in src/install.sh addDriver() function