Claude/review latest commit files 011 c uo yy2a6oh19nm4 s mi cx a#3620
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This commit adds complete Nix flake support for building and deploying LinuxCNC on NixOS with proper real-time kernel configuration. New files: - flake.nix: Main Nix flake with LinuxCNC package definition and NixOS module * Includes all build dependencies (boost, python3, tcl/tk, gtk3, etc.) * Configures user-space real-time (uspace) build * Provides NixOS module for RT-PREEMPT kernel setup * Sets up real-time performance tuning (CPU isolation, governor, etc.) * Includes PAM limits for real-time priority - flake.lock: Lock file pinning dependency versions * nixpkgs: nixos-unstable * flake-utils: for cross-system support * flake-compat: for backward compatibility - NIXOS_SETUP.md: Comprehensive setup and configuration guide * Explains RT-PREEMPT kernel requirements and tuning * Hardware support documentation (parallel port, Mesa, EtherCAT) * Performance testing and troubleshooting * Latency testing guidelines - QUICKSTART_NIX.md: Quick start guide for users * Three methods: direct run, dev shell, system installation * Step-by-step NixOS system integration * Verification and testing procedures - nixos-configuration-example.nix: Example NixOS configuration * Shows how to enable LinuxCNC service * Real-time kernel configuration * User group setup * System tuning recommendations Modified files: - default.nix: Updated to use flake-compat for backward compatibility - shell.nix: Updated to use flake-compat for nix-shell users - .gitignore: Added Nix-specific entries (result, result-*, .direnv/) Key features: - Full dependency management via Nix - Real-time kernel (RT-PREEMPT) support - Proper PAM limits for real-time priority - CPU isolation and performance governor - Hardware access configuration (parallel port, udev rules) - Development environment with all build tools - Simulation mode support for testing without hardware Usage: - `nix run` - Run LinuxCNC directly - `nix develop` - Enter development shell - `nix build` - Build LinuxCNC package - NixOS module for system-wide installation with RT kernel This enables LinuxCNC to run on NixOS with proper real-time performance required for CNC machine control. The RT-PREEMPT kernel provides the deterministic latency needed for precise motion control.
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