feat: migrate to dagger

.dagger/.gitignore

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+node_modules/
+dist/
+build/
+*.log
+.env*
+!.env.example
+generated/
+.cache/
+out/

.dagger/README.md

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+# macOS Cross-Compiler Dagger Module
+
+This Dagger module builds a macOS cross-compiler supporting multiple architectures and compilers.
+
+## Features
+
+- **Multi-architecture support**: aarch64 (ARM64) and x86_64
+- **Multiple compilers**: Clang, GCC, Zig
+- **Language support**: C, C++, Objective-C, Objective-C++, Fortran, Rust
+- **Automated testing**: Validates cross-compiled binaries
+- **Container registry**: Automatic image publishing to GitHub Container Registry
+
+## Usage
+
+### Prerequisites
+
+- [Dagger CLI](https://dagger.io/install)
+- [Bun runtime](https://bun.sh/docs/installation)
+
+### Install dependencies
+
+```bash
+bun install
+```
+
+### Build the cross-compiler
+
+```bash
+dagger call build-image --source=..
+```
+
+### Run tests
+
+```bash
+dagger call test --source=..
+```
+
+### Run full CI pipeline
+
+```bash
+dagger call ci --source=..
+```
+
+### Push to registry (requires credentials)
+
+```bash
+dagger call ci \
+  --source=.. \
+  --ghcr-username="your-username" \
+  --ghcr-password="env://GHCR_PASSWORD"
+```
+
+### Validate executables (macOS only)
+
+```bash
+dagger call validate --source=..
+```
+
+## Configuration
+
+The module supports the following parameters:
+
+- `architectures`: Comma-separated list of target architectures (default: "aarch64,x86_64")
+- `sdkVersion`: macOS SDK version (default: "15.0")
+- `kernelVersion`: Darwin kernel version (default: "24")
+- `targetSdkVersion`: Target SDK version for deployment (default: "11.0.0")
+- `downloadSdk`: Whether to download SDK or use local copy (default: true)
+- `cores`: Number of CPU cores for compilation (default: 16)
+
+## Architecture
+
+The build process follows this sequence:
+
+1. **Base dependencies**: Ubuntu Noble with build tools
+2. **Support libraries**: xar, libdispatch, libtapi
+3. **SDK preparation**: Download or use local macOS SDK
+4. **Cross-compilation tools**: cctools, linker, assembler
+5. **Compiler wrappers**: osxcross wrappers for clang and GCC
+6. **Zig compiler**: For additional Rust support
+7. **GCC compilation**: Full GCC cross-compiler build
+8. **Final image**: Combined image with all tools and libraries
+
+## Output
+
+The final container image includes:
+
+- Cross-compilation toolchain for specified architectures
+- Clang, GCC, and Zig compilers
+- Rust support via zig-cc
+- All necessary libraries and SDKs
+- Test sample programs
+
+## Testing
+
+The module includes comprehensive tests that:
+
+- Compile sample programs with all supported compilers
+- Verify correct target architecture
+- Export test artifacts for inspection
+- Validate executables on macOS (when available)
+
+## Integration
+
+This module integrates with GitHub Actions for continuous integration and automatic image publishing to GitHub Container Registry.

.dagger/dagger.json

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+{
+  "name": "macos-cross-compiler",
+  "engineVersion": "v0.18.12"
+}

.dagger/package.json

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+{
+  "name": "macos-cross-compiler-dagger",
+  "type": "module",
+  "private": true,
+  "scripts": {
+    "build": "echo 'Dagger module ready'",
+    "test": "echo 'No tests configured for Dagger module'",
+    "type-check": "bun tsc --noEmit",
+    "lint": "bunx eslint src",
+    "format": "bunx prettier --check src",
+    "format:write": "bunx prettier --write src",
+    "typecheck": "bunx tsc --noEmit"
+  },
+  "dependencies": {
+    "@dagger.io/dagger": "^0.18.0",
+    "typescript": "^5.5.4"
+  },
+  "devDependencies": {
+    "@eslint/js": "^9.30.1",
+    "@types/node": "^24.0.13",
+    "eslint": "^9.0.0",
+    "prettier": "^3.0.0",
+    "typescript-eslint": "^8.35.1"
+  },
+  "dagger": {
+    "runtime": "bun"
+  }
+}