improve error logging in example code

README.md

@@ -28,6 +28,7 @@ import (
 	"fmt"
 	"io/ioutil"
 	"os"
+	"log"
 
 	"github.com/hashicorp/terraform-exec/tfexec"
 	"github.com/hashicorp/terraform-exec/tfinstall"
@@ -36,29 +37,29 @@ import (
 func main() {
 	tmpDir, err := ioutil.TempDir("", "tfinstall")
 	if err != nil {
-		panic(err)
+		log.Fatalf("error creating temp dir: %s", err)
 	}
 	defer os.RemoveAll(tmpDir)
 
 	execPath, err := tfinstall.Find(context.Background(), tfinstall.LatestVersion(tmpDir, false))
 	if err != nil {
-		panic(err)
+		log.Fatalf("error locating Terraform binary: %s", err)
 	}
 
 	workingDir := "/path/to/working/dir"
 	tf, err := tfexec.NewTerraform(workingDir, execPath)
 	if err != nil {
-		panic(err)
+		log.Fatalf("error running NewTerraform: %s", err)
 	}
 
 	err = tf.Init(context.Background(), tfexec.Upgrade(true))
 	if err != nil {
-		panic(err)
+		log.Fatalf("error running Init: %s", err)
 	}
 
 	state, err := tf.Show(context.Background())
 	if err != nil {
-		panic(err)
+		log.Fatalf("error running Show: %s", err)
 	}
 
 	fmt.Println(state.FormatVersion) // "0.1"