add configurable output

main.go

@@ -3,6 +3,7 @@ package main
 import (
 	"flag"
 	"fmt"
+	"github.com/yannh/kubeconform/pkg/output"
 	"io"
 	"io/ioutil"
 	"log"
@@ -74,13 +75,24 @@ func (i *arrayFiles) Set(value string) error {
 
 func realMain() int {
 	var files, dirs arrayFiles
-	var skipKinds, k8sVersion string
+	var skipKinds, k8sVersion, outputFormat string
 	flag.Var(&files, "file", "file to validate (can be specified multiple times)")
 	flag.Var(&dirs, "dir", "directory to validate (can be specified multiple times)")
 	flag.StringVar(&k8sVersion, "k8sversion", "1.18.0", "version of Kubernetes to test against")
 	flag.StringVar(&skipKinds, "skipKinds", "", "comma-separated list of kinds to ignore")
+	flag.StringVar(&outputFormat, "output", "text", "output format - text, json")
 	flag.Parse()
 
+	var o output.Output
+	switch {
+	case outputFormat == "text":
+		o = output.NewTextOutput()
+	case outputFormat == "json":
+		o = output.NewJSONOutput()
+	default:
+		log.Fatalf("-output must be text or json")
+	}
+
 	filter := func(signature resource.Signature) bool {
 		kinds := strings.Split(skipKinds, ",")
 		for _, kind := range kinds {
@@ -119,27 +131,14 @@ func realMain() int {
 
 			res := validateFile(f, []*registry.KubernetesRegistry{r}, k8sVersion, filter)
 			f.Close()
+
+
 			for _, resourceValidation := range res {
-				if resourceValidation.skipped {
-					log.Printf("skipping resource\n")
-					continue
-				}
-
-				if resourceValidation.err != nil {
-					if _, ok := resourceValidation.err.(validator.InvalidResourceError); ok {
-						log.Printf("invalid resource: %s\n", resourceValidation.err)
-					} else {
-						log.Printf("failed validating resource in file %s: %s\n", filename, resourceValidation.err)
-					}
-					continue
-				}
-
-				if resourceValidation.err == nil && !resourceValidation.skipped{
-					log.Printf("file %s is valid\n", filename)
-				}
+				o.Write(filename, resourceValidation.err, resourceValidation.skipped)
 			}
 		}
 	}
+	o.Flush()
 
 	return 0
 }

pkg/output/json.go

@@ -0,0 +1,45 @@
+package output
+
+import (
+	"encoding/json"
+	"fmt"
+)
+
+type result struct {
+	Filename string  `json:"filename"`
+	Status string `json:"status"`
+	Msg string `json:"msg"`
+}
+
+type JSONOutput struct {
+	results []result
+}
+
+func NewJSONOutput() Output{
+	return &JSONOutput{
+		results: []result{},
+	}
+}
+
+func (o *JSONOutput) Write(filename string,err error, skipped bool) {
+	status := "VALID"
+	msg := ""
+	if err != nil {
+		status = "ERROR"
+		msg = err.Error()
+	}
+	if skipped {
+		status = "SKIPPED"
+	}
+
+	o.results = append(o.results, result{Filename: filename, Status: status, Msg: msg})
+}
+
+func (o *JSONOutput) Flush() {
+	res, err := json.MarshalIndent(o.results,"", "  ")
+	if err != nil {
+		fmt.Printf("error print results: %s", err)
+		return
+	}
+	fmt.Printf("%s\n", res)
+}

pkg/output/main.go

@@ -0,0 +1,7 @@
+package output
+
+type Output interface {
+	Write (filename string, err error, skipped bool)
+	Flush ()
+}
+

pkg/output/text.go

@@ -0,0 +1,37 @@
+package output
+
+import (
+	"github.com/yannh/kubeconform/pkg/validator"
+	"log"
+)
+
+type TextOutput struct {
+}
+
+func NewTextOutput() Output {
+	return &TextOutput{}
+}
+
+func (o *TextOutput) Write(filename string,err error, skipped bool) {
+	if skipped {
+		log.Printf("skipping resource\n")
+		return
+	}
+
+	if err != nil {
+		if _, ok := err.(validator.InvalidResourceError); ok {
+			log.Printf("invalid resource: %s\n", err)
+		} else {
+			log.Printf("failed validating resource in file %s: %s\n", filename, err)
+		}
+		return
+	}
+
+	if !skipped{
+		log.Printf("file %s is valid\n", filename)
+	}
+}
+
+func (o *TextOutput) Flush() {
+}
+