# Nimplate Build System

## Overview

The Nimplate build system provides type-safe, isolated, and cacheable source compilation for NexusOS packages. It supports multiple build systems through a unified template interface.

## Features

- **Type-Safe Templates**: Compile-time validated build configurations
- **Environment Isolation**: Sandboxed builds prevent system contamination
- **Build Caching**: Hash-based incremental compilation
- **Multi-System Support**: CMake, Autotools, Meson, Cargo, Nim, and custom builds
- **Artifact Tracking**: Complete build result and artifact management

## Supported Build Systems

| System    | Status | Description |
|-----------|--------|-------------|
| CMake     | ✅ Full | Modern C/C++ builds with configure/build/install |
| Autotools | ✅ Full | Traditional configure/make/install workflow |
| Meson     | 🔧 Framework | Modern build system (implementation ready) |
| Cargo     | 🔧 Framework | Rust package builds (implementation ready) |
| Nim       | 🔧 Framework | Native Nim compilation (implementation ready) |
| Custom    | 🔧 Framework | User-defined build scripts |

## Usage

```nim
import nimpak/build_system

# Create build template
let buildTmpl = BuildTemplate(
  system: CMake,
  configureArgs: @["-DCMAKE_BUILD_TYPE=Release"],
  buildArgs: @["--parallel"],
  installArgs: @["--prefix", "/usr"]
)

# Execute build
let result = buildFromTemplate(buildTmpl, "/path/to/source")

if result.success:
  echo "Build completed in ", result.buildTime, "s"
  echo "Artifacts: ", result.artifacts.len
else:
  echo "Build failed: ", result.buildLog
```

## Architecture

- **NimplateExecutor**: Main execution engine
- **BuildEnvironment**: Isolated build environment management
- **BuildResult**: Comprehensive result tracking
- **Build Caching**: Hash-based incremental compilation

## Testing

Run the build system tests:

```bash
nim c --hints:off nip/tests/test_build_system_simple.nim
./nip/tests/test_build_system_simple
```

## Next Steps

- Task 13.2: Integration with CAS and packaging
- Enhanced build system implementations
- Container-based isolation
- Advanced caching strategies