Dockerfile

# Use the official Arch Linux base image
FROM docker.io/archlinux:latest
# 1. Update Keyrings and System
# Arch relies on rolling crypto keys. We must update 'archlinux-keyring' first 
# to avoid "invalid signature" errors during the build.
RUN pacman -Sy --noconfirm archlinux-keyring && \
    pacman -Syu --noconfirm
# 2. Install Dependencies
# - mesa: OpenGL/Vulkan drivers for Intel/AMD
# - xorg-xwayland: For running X11 apps inside Wayland
# - qt6-base, qt6-wayland: The UI framework and its Wayland plugin
# - opencv: Computer vision library (Arch package is very comprehensive)
# - sdl2, glfw: Graphics/Input libraries (Arch's 'glfw' supports Wayland out-of-the-box)
# - base-devel, git, cmake: Compilers and build tools
RUN pacman -S --noconfirm \
    mesa \
    vulkan-intel \
    vulkan-radeon \
    xorg-xwayland \
    xorg-xauth \
    qt6-base \
    qt6-wayland \
    opencv \
    sdl2 \
    glfw \
    base-devel \
    git \
    cmake \
    && pacman -Scc --noconfirm # Clean up cache to save space

# 3. Set up a non-root user
# We add the user to 'video' for hardware acceleration access
RUN useradd -u 1000 -m -G video developer

# 4. Environment Variables
# Tell Qt to try Wayland first, then fall back to X11 (xcb)
ENV QT_QPA_PLATFORM="wayland;xcb"
ENV XDG_RUNTIME_DIR="/run/user/1000"

RUN pacman -S --noconfirm sudo

# Allow 'developer' to use sudo without a password
RUN echo "developer ALL=(ALL) NOPASSWD: ALL" > /etc/sudoers.d/developer

# 5. Switch context
USER developer
WORKDIR /home/developer
# Allow 'developer' to use sudo without a password