First commit.

go.mod

@@ -0,0 +1,5 @@
+module code.foilhatguy.casa/ui
+
+go 1.19
+
+require github.com/spf13/pflag v1.0.6

go.sum

@@ -0,0 +1,2 @@
+github.com/spf13/pflag v1.0.6 h1:jFzHGLGAlb3ruxLB8MhbI6A8+AQX/2eW4qeyNZXNp2o=
+github.com/spf13/pflag v1.0.6/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=

ui.go

@@ -0,0 +1,58 @@
+// This package provides --quiet and --verbose flags for cli and corresponding output print functions PrintOut and PrintVerbose.
+
+package ui
+
+import (
+	"fmt"
+	"io"
+	"os"
+
+	"github.com/spf13/pflag"
+)
+
+var stdOutput io.Writer
+var verboseOutput io.Writer
+
+func init() {
+	outputFlagSet := pflag.NewFlagSet("output", pflag.ContinueOnError)
+	outputFlagSet.ParseErrorsWhitelist.UnknownFlags = true
+	outputFlagSet.SetOutput(nil)
+
+	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.")
+
+	err := outputFlagSet.Parse(os.Args)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+
+	SetupOutputMode(*isQuiet, *isVerbose)
+}
+
+func SetupOutputMode(isQuiet bool, isVerbose bool) {
+	if isQuiet {
+		stdOutput = io.Discard
+		verboseOutput = io.Discard
+        return
+	}
+
+	if isVerbose {
+        stdOutput = os.Stdout
+		verboseOutput = os.Stdout
+        return
+	}
+
+    stdOutput = os.Stdout
+    verboseOutput = io.Discard
+}
+
+func PrintOut(a ...any) (n int, err error) {
+	n, err = fmt.Fprintln(stdOutput, a...)
+	return
+}
+
+func PrintVerbose(a ...any) (n int, err error) {
+	n, err = fmt.Fprintln(verboseOutput, a...)
+	return
+}