Move tabwriter to package util

This offloads the "magic numbers" that are used when creating a
tabwriter

cmd/workflow/workflow_list.go

@@ -3,11 +3,11 @@ package workflow
 import (
 	"fmt"
 	"io"
-	"text/tabwriter"
 
 	"github.com/spf13/cobra"
 	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 
+	"github.com/ian-howell/airshipctl/pkg/util"
 	"github.com/ian-howell/airshipctl/pkg/environment"
 	wfenv "github.com/ian-howell/airshipctl/pkg/workflow/environment"
 )
@@ -29,7 +29,7 @@ func NewWorkflowListCommand(out io.Writer, rootSettings *environment.AirshipCTLS
 			if err != nil {
 				panic(err.Error())
 			}
-			w := tabwriter.NewWriter(out, 0, 0, 5, ' ', 0)
+			w := util.NewTabWriter(out)
 			defer w.Flush()
 			fmt.Fprintf(w, "%s\t%s\n", "NAME", "PHASE")
 			for _, wf := range wflist.Items {

pkg/util/tabwriter.go

@@ -0,0 +1,19 @@
+package util
+
+import (
+	"io"
+	"text/tabwriter"
+)
+
+const (
+	tabwriterMinWidth = 6
+	tabwriterWidth    = 4
+	tabwriterPadding  = 3
+	tabwriterPadChar  = ' '
+	tabwriterFlags    = 0
+)
+
+// NewTabWriter returns a tabwriter that translates tabbed columns in input into properly aligned text.
+func NewTabWriter(out io.Writer) *tabwriter.Writer {
+	return tabwriter.NewWriter(out, tabwriterMinWidth, tabwriterWidth, tabwriterPadding, tabwriterPadChar, tabwriterFlags)
+}