convert: cli for direct conversion

.gitignore

@@ -13,3 +13,4 @@ test_data
 llama/build
 __debug_bin*
 llama/vendor
+cmd/convert/out

cmd/convert/main.go

@@ -0,0 +1,75 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"runtime"
+
+	"github.com/ollama/ollama/convert"
+)
+
+func main() {
+	// Check if directory path is provided
+	if len(os.Args) != 2 {
+		fmt.Printf("expected one argument (directory path), got %d\n", len(os.Args)-1)
+		os.Exit(1)
+	}
+
+	dirPath := os.Args[1]
+
+	if err := convertFromDirectory(dirPath); err != nil {
+		fmt.Fprintf(os.Stderr, "error: %v\n", err)
+		os.Exit(1)
+	}
+	fmt.Println("conversion completed successfully")
+}
+
+func convertFromDirectory(dirPath string) error {
+	// Verify the directory exists and is accessible
+	info, err := os.Stat(dirPath)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return fmt.Errorf("directory does not exist: %s", dirPath)
+		}
+		if os.IsPermission(err) {
+			return fmt.Errorf("permission denied accessing directory: %s", dirPath)
+		}
+		return fmt.Errorf("error accessing directory: %v", err)
+	}
+	if !info.IsDir() {
+		return fmt.Errorf("%s is not a directory", dirPath)
+	}
+
+	// Get the directory where the script is located
+	_, scriptPath, _, ok := runtime.Caller(0)
+	if !ok {
+		return fmt.Errorf("could not determine script location")
+	}
+	scriptDir := filepath.Dir(scriptPath)
+
+	// Create out directory relative to the script location
+	outDir := filepath.Join(scriptDir, "out")
+	if err := os.MkdirAll(outDir, 0755); err != nil {
+		return fmt.Errorf("failed to create output directory: %v", err)
+	}
+
+	// Create output file in the out directory
+	outFile := filepath.Join(outDir, "model.fp16")
+	fmt.Printf("writing output to: %s\n", outFile)
+
+	t, err := os.Create(outFile)
+	if err != nil {
+		return fmt.Errorf("failed to create output file: %v", err)
+	}
+	defer t.Close()
+
+	// Use standard os.DirFS to read from directory
+	if err := convert.ConvertModel(os.DirFS(dirPath), t); err != nil {
+		// Clean up the output file if conversion fails
+		os.Remove(outFile)
+		return fmt.Errorf("model conversion failed: %v", err)
+	}
+
+	return nil
+}