Handle single string=>string flags without quotes (#179)

OK: --f1 "a=5,6" --f2 b=3,4 --f3 "c=5,6",d=7
Not OK: --f4 c="5,6"

1 files changed, 15 insertions, 4 deletions

diff --git a/string_to_string.go b/string_to_string.go
index 64892db..890a01a 100644
--- a/string_to_string.go
+++ b/string_to_string.go
@@ -22,11 +22,22 @@ func newStringToStringValue(val map[string]string, p *map[string]string) *string
 
 // Format: a=1,b=2
 func (s *stringToStringValue) Set(val string) error {
-	r := csv.NewReader(strings.NewReader(val))
-	ss, err := r.Read()
-	if err != nil {
-		return err
+	var ss []string
+	n := strings.Count(val, "=")
+	switch n {
+	case 0:
+		return fmt.Errorf("%s must be formatted as key=value", val)
+	case 1:
+		ss = append(ss, strings.Trim(val, `"`))
+	default:
+		r := csv.NewReader(strings.NewReader(val))
+		var err error
+		ss, err = r.Read()
+		if err != nil {
+			return err
+		}
 	}
+
 	out := make(map[string]string, len(ss))
 	for _, pair := range ss {
 		kv := strings.SplitN(pair, "=", 2)