Return errors, rather than printing them

core/edit.go

@@ -1,23 +1,28 @@
 package core
 
 import (
+	"errors"
+
 	"github.com/rwinkhart/go-boilerplate/back"
 	"github.com/rwinkhart/libmutton/crypt"
 )
 
 // GetOldEntryData decrypts and returns old entry data (with all required lines present).
-func GetOldEntryData(targetLocation string, field int) []string {
+func GetOldEntryData(targetLocation string, field int) ([]string, error) {
 	// ensure targetLocation exists
 	back.TargetIsFile(targetLocation, true, 2)
 
 	// read old entry data
-	unencryptedEntry := crypt.DecryptFileToSlice(targetLocation)
+	unencryptedEntry, err := crypt.DecryptFileToSlice(targetLocation)
+	if err != nil {
+		return nil, errors.New("unable to decrypt entry: " + err.Error())
+	}
 
 	// return the old entry data with all required lines present
 	if field > 0 {
-		return ensureSliceLength(unencryptedEntry, field)
+		return ensureSliceLength(unencryptedEntry, field), nil
 	} else {
-		return unencryptedEntry
+		return unencryptedEntry, nil
 	}
 }