Initial build target (#9)

Signed-off-by: nojaf <florian.verdonck@outlook.com>

.github/workflows/build.yml

@@ -0,0 +1,40 @@
+name: Build
+
+on:
+  workflow_call:
+
+permissions:
+  contents: read
+
+jobs:
+  wheel:
+    name: Build Python wheel
+    strategy:
+      matrix:
+        os: ["darwin","linux", "windows"]
+        arch: ["amd64", "arm64"]
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: "1.22"
+          check-latest: true
+          cache: false
+
+      - name: Setup Python
+        uses: actions/setup-python@v5
+
+      - name: Install mage
+        run: go install github.com/magefile/mage@v1.15.0
+
+      - name: Run build target
+        run: mage build ${{ matrix.os }} ${{ matrix.arch }}
+
+      - name: Upload wheels artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: mlflow-go-wheels-${{ matrix.os }}-${{ matrix.arch }}
+          path: dist/*.whl

.github/workflows/ci.yml

@@ -16,3 +16,6 @@ jobs:
 
   test:
     uses: ./.github/workflows/test.yml
+
+  build:
+    uses: ./.github/workflows/build.yml

.gitignore

@@ -13,4 +13,10 @@ __pycache__/
 .mlflow.repo/
 
 # JetBrains
-.idea
+.idea
+
+# Wheel
+build/
+
+# virtual environment
+env/

magefiles/build.go

@@ -0,0 +1,93 @@
+//go:build mage
+
+//nolint:wrapcheck
+package main
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+	"runtime"
+
+	"github.com/magefile/mage/sh"
+)
+
+var errUnknownTarget = errors.New("could not determine zig target")
+
+// Helper function to determine the Zig target triple based on OS and architecture.
+func getTargetTriple(goos, goarch string) (string, error) {
+	switch goos {
+	case "linux":
+		if goarch == "amd64" {
+			return "x86_64-linux-gnu", nil
+		} else if goarch == "arm64" {
+			return "aarch64-linux-gnu", nil
+		}
+	case "windows":
+		if goarch == "amd64" {
+			return "x86_64-windows-gnu", nil
+		} else if goarch == "arm64" {
+			return "aarch64-windows-gnu", nil
+		}
+	}
+
+	return "", fmt.Errorf("%w: %s/%s", errUnknownTarget, goos, goarch)
+}
+
+var errUnsupportedDarwin = errors.New(`it is unsupported to build a Python wheel on Mac on a non-Mac platform`)
+
+// Build a Python wheel.
+func Build(goos, goarch string) error {
+	tmp, err := os.MkdirTemp("", "")
+	if err != nil {
+		return err
+	}
+
+	defer os.RemoveAll(tmp)
+
+	env, err := filepath.Abs(filepath.Join(tmp, ".venv"))
+	if err != nil {
+		return err
+	}
+
+	if err := sh.RunV("python3", "-mvenv", env); err != nil {
+		return err
+	}
+
+	pip := filepath.Join(env, "bin", "pip")
+	python := filepath.Join(env, "bin", "python")
+
+	if err := sh.RunV(pip, "install", "build", "ziglang"); err != nil {
+		return err
+	}
+
+	environmentVariables := map[string]string{
+		"GOOS":   goos,
+		"GOARCH": goarch,
+	}
+
+	// Set Zig as the C compiler for cross-compilation
+	// If we are on Mac and targeting Mac we don't need Zig.
+	if goos == "darwin" {
+		if runtime.GOOS != "darwin" {
+			return errUnsupportedDarwin
+		}
+	} else {
+		target, err := getTargetTriple(goos, goarch)
+		if err != nil {
+			return err
+		}
+
+		zigCC := python + " -mziglang cc -target " + target
+		environmentVariables["CC"] = zigCC
+	}
+
+	if err := sh.RunWithV(
+		environmentVariables,
+		python, "-mbuild"); err != nil {
+		return err
+	}
+
+	return nil
+}