Try to expose JSON paths (#173)

* Try to expose JSON paths
* update validationErrors format in json output
* Add test to JSON output with validationError

pkg/output/json.go

@@ -9,12 +9,13 @@ import (
 )
 
 type oresult struct {
-	Filename string `json:"filename"`
-	Kind     string `json:"kind"`
-	Name     string `json:"name"`
-	Version  string `json:"version"`
-	Status   string `json:"status"`
-	Msg      string `json:"msg"`
+	Filename         string                      `json:"filename"`
+	Kind             string                      `json:"kind"`
+	Name             string                      `json:"name"`
+	Version          string                      `json:"version"`
+	Status           string                      `json:"status"`
+	Msg              string                      `json:"msg"`
+	ValidationErrors []validator.ValidationError `json:"validationErrors,omitempty"`
 }
 
 type jsono struct {
@@ -49,11 +50,15 @@ func (o *jsono) Write(result validator.Result) error {
 		o.nValid++
 	case validator.Invalid:
 		st = "statusInvalid"
-		msg = result.Err.Error()
+		if result.Err != nil {
+			msg = result.Err.Error()
+		}
 		o.nInvalid++
 	case validator.Error:
 		st = "statusError"
-		msg = result.Err.Error()
+		if result.Err != nil {
+			msg = result.Err.Error()
+		}
 		o.nErrors++
 	case validator.Skipped:
 		st = "statusSkipped"
@@ -63,7 +68,15 @@ func (o *jsono) Write(result validator.Result) error {
 
 	if o.verbose || (result.Status != validator.Valid && result.Status != validator.Skipped && result.Status != validator.Empty) {
 		sig, _ := result.Resource.Signature()
-		o.results = append(o.results, oresult{Filename: result.Resource.Path, Kind: sig.Kind, Name: sig.Name, Version: sig.Version, Status: st, Msg: msg})
+		o.results = append(o.results, oresult{
+			Filename:         result.Resource.Path,
+			Kind:             sig.Kind,
+			Name:             sig.Name,
+			Version:          sig.Version,
+			Status:           st,
+			Msg:              msg,
+			ValidationErrors: result.ValidationErrors,
+		})
 	}
 
 	return nil

pkg/output/json_test.go

@@ -93,6 +93,60 @@ metadata:
     "skipped": 0
   }
 }
+`,
+		},
+		{
+			"a single invalid deployment, verbose, with summary",
+			true,
+			false,
+			true,
+			[]validator.Result{
+				{
+					Resource: resource.Resource{
+						Path: "deployment.yml",
+						Bytes: []byte(`apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: "my-app"
+`),
+					},
+					Status: validator.Invalid,
+					Err: &validator.ValidationError{
+						Path: "foo",
+						Msg:  "bar",
+					},
+					ValidationErrors: []validator.ValidationError{
+						{
+							Path: "foo",
+							Msg:  "bar",
+						},
+					},
+				},
+			},
+			`{
+  "resources": [
+    {
+      "filename": "deployment.yml",
+      "kind": "Deployment",
+      "name": "my-app",
+      "version": "apps/v1",
+      "status": "statusInvalid",
+      "msg": "bar",
+      "validationErrors": [
+        {
+          "path": "foo",
+          "msg": "bar"
+        }
+      ]
+    }
+  ],
+  "summary": {
+    "valid": 0,
+    "invalid": 1,
+    "errors": 0,
+    "skipped": 0
+  }
+}
 `,
 		},
 	} {

pkg/validator/validator.go

@@ -3,6 +3,7 @@ package validator
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"io"
 
@@ -26,11 +27,21 @@ const (
 	Empty          // resource is empty. Note: is triggered for files starting with a --- separator.
 )
 
+type ValidationError struct {
+	Path string `json:"path"`
+	Msg  string `json:"msg"`
+}
+
+func (ve *ValidationError) Error() string {
+	return ve.Msg
+}
+
 // Result contains the details of the result of a resource validation
 type Result struct {
-	Resource resource.Resource
-	Err      error
-	Status   Status
+	Resource         resource.Resource
+	Err              error
+	Status           Status
+	ValidationErrors []ValidationError
 }
 
 // Validator exposes multiple methods to validate your Kubernetes resources.
@@ -181,7 +192,23 @@ func (val *v) ValidateResource(res resource.Resource) Result {
 
 	err = schema.Validate(r)
 	if err != nil {
-		return Result{Resource: res, Status: Invalid, Err: fmt.Errorf("problem validating schema. Check JSON formatting: %s", err)}
+		validationErrors := []ValidationError{}
+		var e *jsonschema.ValidationError
+		if errors.As(err, &e) {
+			for _, ve := range e.Causes {
+				validationErrors = append(validationErrors, ValidationError{
+					Path: ve.KeywordLocation,
+					Msg:  ve.Message,
+				})
+			}
+
+		}
+		return Result{
+			Resource:         res,
+			Status:           Invalid,
+			Err:              fmt.Errorf("problem validating schema. Check JSON formatting: %s", err),
+			ValidationErrors: validationErrors,
+		}
 	}
 
 	return Result{Resource: res, Status: Valid}