v1.0.8 filename length limit

main.go

@@ -9,6 +9,7 @@ import (
 	"log"
 	"os"
 	"path"
+	"strconv"
 	"strings"
 	"text/template"
 	"time"
@@ -151,9 +152,37 @@ func testEnv() error {
 		return errors.New("missing LIBRARY_NOTAGS_ROOT")
 	}
 
+	if !testEnvFilenameLimit() {
+		return errors.New("unable to parse FILENAME_LIMIT")
+	}
+
 	return nil
 }
 
+func testEnvFilenameLimit() bool {
+	limit, ok := os.LookupEnv("FILENAME_LIMIT")
+	if !ok {
+		return true
+	}
+	_, err := strconv.Atoi(limit)
+	if err != nil {
+		return false
+	}
+	return true
+}
+
+func getEnvFilenameLimit() int {
+	limit, ok := os.LookupEnv("FILENAME_LIMIT")
+	if !ok {
+		return 255
+	}
+	limit_i, err := strconv.Atoi(limit)
+	if err != nil {
+		return 255
+	}
+	return limit_i
+}
+
 func getTagsInDir(directory string) (tag.Metadata, error) {
 	files, err := os.ReadDir(directory)
 	if err != nil {
@@ -356,7 +385,13 @@ func doMoveTagged(filePath string, fileTags tag.Metadata) error {
 		return err
 	}
 
-	libFile := path.Join(libRoot, bufPath.String(), bufFile.String() + fileExt)
+	filenameLimit := getEnvFilenameLimit() - len(fileExt)
+	filename := bufFile.String()
+	if len(filename) > filenameLimit {
+		filename = filename[:filenameLimit]
+	}
+
+	libFile := path.Join(libRoot, bufPath.String(), filename + fileExt)
 
 	return move(filePath, libFile)
 }