Add headers to matrix-diff-ss file

cmd/main.go

@@ -187,7 +187,7 @@ func main() {
 }
 
 func diff(mat types.ComMatrix, ssMat types.ComMatrix) string {
-	diff := ""
+	diff := consts.CSVHeaders + "\n"
 	for _, cd := range mat.Matrix {
 		if ssMat.Contains(cd) {
 			diff += fmt.Sprintf("%s\n", cd)

consts/consts.go

@@ -8,4 +8,5 @@ const (
 	RoleLabel             = "node-role.kubernetes.io/"
 	DefaultDebugNamespace = "openshift-commatrix-debug"
 	DefaultDebugPodImage  = "quay.io/openshift-release-dev/ocp-release:4.15.12-multi"
+	CSVHeaders            = "Direction,Protocol,Port,Namespace,Service,Pod,Container,Node Role,Optional"
 )

types/types.go

@@ -8,6 +8,7 @@ import (
 	"fmt"
 	"strings"
 
+	"github.com/openshift-kni/commatrix/consts"
 	"sigs.k8s.io/yaml"
 )
 
@@ -28,13 +29,11 @@ type ComDetails struct {
 }
 
 func ToCSV(m ComMatrix) ([]byte, error) {
-	var header = "Direction,Protocol,Port,Namespace,Service,Pod,Container,Node Role,Optional"
-
 	out := make([]byte, 0)
 	w := bytes.NewBuffer(out)
 	csvwriter := csv.NewWriter(w)
 
-	err := csvwriter.Write(strings.Split(header, ","))
+	err := csvwriter.Write(strings.Split(consts.CSVHeaders, ","))
 	if err != nil {
 		return nil, fmt.Errorf("failed to write to CSV: %w", err)
 	}