refactor(pty): switch to using interface (#34)

* refactor(pty): switch to using interface

for better flexibility (although may not be useful)

* chore: reduce error messages

* delete redundant messages

pkg/gpu/gpu.go

@@ -4,25 +4,24 @@
 package gpu
 
 import (
-	"fmt"
+	"errors"
 
 	"github.com/jaypipes/ghw"
 )
 
-func GetGPUModel() []string {
+func GetGPUModel() ([]string, error) {
 	var gpuModel []string
 	gi, err := ghw.GPU(ghw.WithDisableWarnings())
 	if err != nil {
-		fmt.Printf("Error getting GPU info: %v", err)
-		return nil
+		return nil, err
 	}
 
 	for _, card := range gi.GraphicsCards {
 		if card.DeviceInfo == nil {
-			return nil
+			return nil, errors.New("Cannot find device info")
 		}
 		gpuModel = append(gpuModel, card.DeviceInfo.Product.Name)
 	}
 
-	return gpuModel
+	return gpuModel, nil
 }

pkg/gpu/gpu_darwin.go

@@ -3,7 +3,6 @@
 package gpu
 
 import (
-	"fmt"
 	"os/exec"
 	"regexp"
 	"strings"
@@ -26,7 +25,7 @@ func extractGPUInfo(cmd *exec.Cmd) ([]string, error) {
 	return modelNames, nil
 }
 
-func GetGPUModel() []string {
+func GetGPUModel() ([]string, error) {
 	vendorNames := []string{
 		"AMD", "Intel", "Nvidia", "Apple",
 	}
@@ -37,8 +36,7 @@ func GetGPUModel() []string {
 		ioreg = exec.Command("ioreg", "-rd1", "-c", "IOPCIDevice")
 		gi, err = extractGPUInfo(ioreg)
 		if err != nil {
-			fmt.Println("Error executing ioreg:", err)
-			return nil
+			return nil, err
 		}
 	}
 
@@ -51,5 +49,5 @@ func GetGPUModel() []string {
 			}
 		}
 	}
-	return gpuModel
+	return gpuModel, nil
 }