Get rid from pflag dependency.

ui.go

@@ -1,33 +1,36 @@
-// This package provides --quiet and --verbose flags for cli and corresponding output print functions PrintOut and PrintVerbose.
-// Another line
 package ui
 
 import (
 	"fmt"
 	"io"
 	"os"
-
-	"github.com/spf13/pflag"
+    "strings"
 )
 
 var stdOutput io.Writer
 var verboseOutput io.Writer
 
 func init() {
-	outputFlagSet := pflag.NewFlagSet("output", pflag.ContinueOnError)
-	outputFlagSet.ParseErrorsWhitelist.UnknownFlags = true
-	outputFlagSet.SetOutput(nil)
+    isQuiet := detectFlag("q", "--quiet")
+    isVerbose := detectFlag("V", "--verbose")
 
-	isVerbose := outputFlagSet.BoolP("verbose", "V", false, "If set adds additional details to output.")
-	isQuiet := outputFlagSet.BoolP("quiet", "q", false, "If set makes no output at all.")
+	SetupOutputMode(isQuiet, isVerbose)
+}
 
-	err := outputFlagSet.Parse(os.Args)
-	if err != nil {
-		fmt.Println(err)
-		os.Exit(1)
-	}
+func detectFlag(shortFlag string, fullFlag string) bool {
+    for _, arg := range os.Args {
+        return containFlag(arg, shortFlag) || arg == fullFlag 
+    }
+    return false
+}
 
-	SetupOutputMode(*isQuiet, *isVerbose)
+func containFlag(arg string, shortFlag string) bool {
+    if len(arg)>1 {
+        if arg[0] == "-"[0] && arg[1] != "-"[0] {
+            return strings.Contains(arg, shortFlag)
+        }
+    }
+    return false
 }
 
 func SetupOutputMode(isQuiet bool, isVerbose bool) {