added utils to flagset

pkg/flagset/utils.go

@@ -0,0 +1,14 @@
+package flagset
+
+import "strings"
+
+// ParseAppsFlag transforms a string of the format "a, b, c" into []string{"a", "b", "c"}
+func ParseAppsFlag(src string) []string {
+	var apps []string
+	parsed := strings.Split(src, ",")
+	for _, v := range parsed {
+		apps = append(apps, strings.TrimSpace(v))
+	}
+
+	return apps
+}