allow thumbnail.png to not exist

main.go

@@ -217,14 +217,16 @@ func main() {
 	}
 
 	// scan for thumbnail
+	var thumbnail *yt.Thumbnail
 	thumbnailPath, thumbnailSizeBytes, err := scanner.ScanThumbnail(directory)
 	if err != nil {
 		log.Fatalf("Failed to fetch thumbnail: %v", err)
 		os.Exit(1)
-	}
-	thumbnail := &yt.Thumbnail{
-		Filepath: thumbnailPath,
-		SizeBytes: thumbnailSizeBytes,
+	} else {
+		thumbnail = &yt.Thumbnail{
+			Filepath: thumbnailPath,
+			SizeBytes: thumbnailSizeBytes,
+		}
 	}
 
 	// build video template for upload

scanner/scanner.go

@@ -2,6 +2,7 @@ package scanner
 
 import (
 	"encoding/json"
+	"errors"
 	"fmt"
 	"os"
 	"path"
@@ -65,6 +66,9 @@ func ScanThumbnail(directory string) (string, int64, error) {
 	thumbnailPath := path.Join(directory, "thumbnail.png")
 	stat, err := os.Stat(thumbnailPath)
 	if err != nil {
+		if os.IsNotExist(err) {
+			return "", 0, err
+		}
 		return "", 0, err
 	}
 	if stat.IsDir() {

youtube/youtube.go

@@ -285,27 +285,29 @@ func UploadVideo(
 		return nil, err
 	}
 
-	// upload thumbnail
+	if thumbnail != nil {
+		// upload thumbnail
 
-	thumbnailService := youtube.NewThumbnailsService(service)
-	thumbnailSetCall := thumbnailService.Set(ytVideo.Id)
-	thumbnailFile, err := os.Open(thumbnail.Filepath)
-	if err != nil {
-		log.Fatalf("Failed to open thumbnail: %v\n", err)
-		return nil, err
-	}
-	thumbnailSetCall.Media(thumbnailFile)
+		thumbnailService := youtube.NewThumbnailsService(service)
+		thumbnailSetCall := thumbnailService.Set(ytVideo.Id)
+		thumbnailFile, err := os.Open(thumbnail.Filepath)
+		if err != nil {
+			log.Printf("Failed to open thumbnail: %v\n", err)
+			return ytVideo, err
+		}
+		thumbnailSetCall.Media(thumbnailFile)
 
-	log.Println("Uploading thumbnail...")
+		log.Println("Uploading thumbnail...")
 
-	thumbnailSetCall.ProgressUpdater(func(current, total int64) {
-		if total == 0 { total = thumbnail.SizeBytes }
-		fmt.Printf("\t(%.2f%%)\n", float64(current) / float64(total) * 100)
-	})
-	// kinda don't care about the response here- so long as it works!
-	_, err = thumbnailSetCall.Do()
-	if err != nil {
-		log.Printf("Failed to upload thumbnail: %v\n", err)
+		thumbnailSetCall.ProgressUpdater(func(current, total int64) {
+			if total == 0 { total = thumbnail.SizeBytes }
+			fmt.Printf("\t(%.2f%%)\n", float64(current) / float64(total) * 100)
+		})
+		// kinda don't care about the response here- so long as it works!
+		_, err = thumbnailSetCall.Do()
+		if err != nil {
+			log.Printf("Failed to upload thumbnail: %v\n", err)
+		}
 	}
 
 	return ytVideo, err