Support kyaml output (#242)

* Support kyaml output

* Bump golangci-lint and fix configs

* Add the supported printers directly to the flag

Author: rikatz

.golangci.yml

@@ -2,7 +2,7 @@ run:
   timeout: 10m
   issues-exit-code: 1
   tests: true
-  skip-dirs-use-default: true
+  exclude-dirs-use-default: true
   modules-download-mode: readonly
   allow-parallel-runners: false
 
@@ -14,7 +14,6 @@ linters:
   - revive
   - govet
   - misspell
-  - exportloopref
   disable-all: false
   presets:
   - bugs
@@ -32,6 +31,10 @@ linters-settings:
     shadow: true
   misspell:
     locale: US
+  # (rkatz) - Added as we have a couple of APIs conversion (eg Istio, Kong) that convert uint->int and there's no solution
+  gosec:
+    excludes:
+      - G115
 
 issues:
   exclude-rules:

cmd/print.go

@@ -27,7 +27,6 @@ import (
 	"github.com/spf13/cobra"
 	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
 	"k8s.io/apimachinery/pkg/runtime/serializer/json"
-	"k8s.io/cli-runtime/pkg/genericclioptions"
 	"k8s.io/cli-runtime/pkg/printers"
 	"k8s.io/client-go/tools/clientcmd"
 
@@ -264,6 +263,9 @@ func (pr *PrintRunner) initializeResourcePrinter() error {
 	case "yaml", "":
 		pr.resourcePrinter = &printers.YAMLPrinter{}
 		return nil
+	case "kyaml":
+		pr.resourcePrinter = &printers.KYAMLPrinter{}
+		return nil
 	case "json":
 		pr.resourcePrinter = &printers.JSONPrinter{}
 		return nil
@@ -305,8 +307,6 @@ func (pr *PrintRunner) initializeNamespaceFilter() error {
 
 func newPrintCommand() *cobra.Command {
 	pr := &PrintRunner{}
-	var printFlags genericclioptions.JSONYamlPrintFlags
-	allowedFormats := printFlags.AllowedFormats()
 
 	// printCmd represents the print command. It prints Gateway API resources
 	// generated from Ingress resources.
@@ -324,7 +324,7 @@ func newPrintCommand() *cobra.Command {
 	}
 
 	cmd.Flags().StringVarP(&pr.outputFormat, "output", "o", "yaml",
-		fmt.Sprintf(`Output format. One of: (%s).`, strings.Join(allowedFormats, ", ")))
+		"Output format. One of: (yaml, json, kyaml).")
 
 	cmd.Flags().StringVar(&pr.inputFile, "input-file", "",
 		`Path to the manifest file. When set, the tool will read ingresses from the file instead of reading from the cluster. Supported files are yaml and json.`)

cmd/print_test.go

@@ -47,6 +47,12 @@ func Test_getResourcePrinter(t *testing.T) {
 			expectedPrinter: &printers.YAMLPrinter{},
 			expectingError:  false,
 		},
+		{
+			name:            "KYAML format",
+			outputFormat:    "kyaml",
+			expectedPrinter: &printers.KYAMLPrinter{},
+			expectingError:  false,
+		},
 		{
 			name:            "Default to YAML format",
 			outputFormat:    "",

go.mod

@@ -1,93 +1,93 @@
 module github.com/kubernetes-sigs/ingress2gateway
 
-go 1.22.0
+go 1.24.0
+
+toolchain go1.24.6
 
 require (
 	github.com/GoogleCloudPlatform/gke-gateway-api v1.3.0
 	github.com/getkin/kin-openapi v0.124.0
-	github.com/google/go-cmp v0.6.0
+	github.com/google/go-cmp v0.7.0
 	github.com/kong/kubernetes-ingress-controller/v2 v2.12.3
 	github.com/olekukonko/tablewriter v0.0.5
 	github.com/samber/lo v1.39.0
-	github.com/spf13/cobra v1.8.0
-	github.com/stretchr/testify v1.9.0
+	github.com/spf13/cobra v1.9.1
+	github.com/stretchr/testify v1.10.0
 	istio.io/api v1.20.0
-	k8s.io/api v0.30.1
-	k8s.io/apimachinery v0.30.1
-	k8s.io/cli-runtime v0.29.0
-	k8s.io/client-go v0.30.0
+	k8s.io/api v0.34.0
+	k8s.io/apimachinery v0.34.0
+	k8s.io/cli-runtime v0.34.0
+	k8s.io/client-go v0.34.0
 	k8s.io/ingress-gce v1.30.0
-	k8s.io/utils v0.0.0-20240502163921-fe8a2dddb1d0
-	sigs.k8s.io/controller-runtime v0.18.0
+	k8s.io/utils v0.0.0-20250604170112-4c0f3b243397
+	sigs.k8s.io/controller-runtime v0.22.0
 	sigs.k8s.io/gateway-api v1.1.0
 )
 
 require (
-	github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1 // indirect
+	github.com/Azure/go-ansiterm v0.0.0-20230124172434-306776ec8161 // indirect
+	github.com/blang/semver/v4 v4.0.0 // indirect
+	github.com/fxamacker/cbor/v2 v2.9.0 // indirect
 	github.com/invopop/yaml v0.2.0 // indirect
 	github.com/mattn/go-runewidth v0.0.15 // indirect
-	github.com/moby/term v0.0.0-20221205130635-1aeaba878587 // indirect
+	github.com/moby/term v0.5.0 // indirect
 	github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826 // indirect
-	github.com/onsi/gomega v1.33.0 // indirect
 	github.com/perimeterx/marshmallow v1.1.5 // indirect
 	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
 	github.com/rivo/uniseg v0.2.0 // indirect
-	golang.org/x/exp v0.0.0-20240416160154-fe59bbe5cc7f // indirect
+	github.com/x448/float16 v0.8.4 // indirect
+	go.yaml.in/yaml/v2 v2.4.2 // indirect
+	go.yaml.in/yaml/v3 v3.0.4 // indirect
+	golang.org/x/exp v0.0.0-20240719175910-8a7402abbf56 // indirect
+	gopkg.in/evanphx/json-patch.v4 v4.12.0 // indirect
+	sigs.k8s.io/randfill v1.0.0 // indirect
+	sigs.k8s.io/structured-merge-diff/v6 v6.3.0 // indirect
 )
 
 require (
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
-	github.com/emicklei/go-restful/v3 v3.12.0 // indirect
-	github.com/evanphx/json-patch v5.7.0+incompatible // indirect
-	github.com/evanphx/json-patch/v5 v5.9.0 // indirect
+	github.com/emicklei/go-restful/v3 v3.12.2 // indirect
+	github.com/evanphx/json-patch/v5 v5.9.11 // indirect
 	github.com/go-errors/errors v1.5.1 // indirect
-	github.com/go-logr/logr v1.4.1 // indirect
+	github.com/go-logr/logr v1.4.2 // indirect
 	github.com/go-openapi/jsonpointer v0.21.0 // indirect
 	github.com/go-openapi/jsonreference v0.21.0 // indirect
 	github.com/go-openapi/swag v0.23.0 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/golang/protobuf v1.5.4 // indirect
-	github.com/google/btree v1.1.2 // indirect
-	github.com/google/gnostic-models v0.6.9-0.20230804172637-c7be7c783f49 // indirect
-	github.com/google/gofuzz v1.2.0 // indirect
-	github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 // indirect
+	github.com/google/btree v1.1.3 // indirect
+	github.com/google/gnostic-models v0.7.0 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/gregjones/httpcache v0.0.0-20190611155906-901d90724c79 // indirect
-	github.com/imdario/mergo v0.3.16 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/liggitt/tabwriter v0.0.0-20181228230101-89fcab3d43de // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
-	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/modern-go/reflect2 v1.0.3-0.20250322232337-35a7c28c31ee // indirect
 	github.com/monochromegane/go-gitignore v0.0.0-20200626010858-205db1a8cc00 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/peterbourgon/diskv v2.0.1+incompatible // indirect
 	github.com/pkg/errors v0.9.1 // indirect
-	github.com/spf13/pflag v1.0.5 // indirect
+	github.com/spf13/pflag v1.0.6 // indirect
 	github.com/xlab/treeprint v1.2.0 // indirect
-	go.starlark.net v0.0.0-20231121155337-90ade8b19d09 // indirect
-	golang.org/x/net v0.25.0 // indirect
-	golang.org/x/oauth2 v0.19.0 // indirect
-	golang.org/x/sync v0.7.0 // indirect
-	golang.org/x/sys v0.20.0 // indirect
-	golang.org/x/term v0.20.0 // indirect
-	golang.org/x/text v0.15.0 // indirect
-	golang.org/x/time v0.5.0 // indirect
-	google.golang.org/genproto v0.0.0-20231120223509-83a465c0220f // indirect
-	google.golang.org/genproto/googleapis/api v0.0.0-20231120223509-83a465c0220f // indirect
-	google.golang.org/protobuf v1.33.0
-	gopkg.in/evanphx/json-patch.v5 v5.7.0 // indirect
+	golang.org/x/net v0.38.0 // indirect
+	golang.org/x/oauth2 v0.27.0 // indirect
+	golang.org/x/sync v0.12.0 // indirect
+	golang.org/x/sys v0.31.0 // indirect
+	golang.org/x/term v0.30.0 // indirect
+	golang.org/x/text v0.23.0 // indirect
+	golang.org/x/time v0.9.0 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20250303144028-a0af3efb3deb // indirect
+	google.golang.org/protobuf v1.36.5
 	gopkg.in/inf.v0 v0.9.1 // indirect
-	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 	istio.io/client-go v1.19.0-alpha.1.0.20231130185426-9f1859c8ff42
-	k8s.io/klog/v2 v2.120.1
-	k8s.io/kube-openapi v0.0.0-20240423202451-8948a665c108 // indirect
-	sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd // indirect
-	sigs.k8s.io/kustomize/api v0.15.0 // indirect
-	sigs.k8s.io/kustomize/kyaml v0.15.0 // indirect
-	sigs.k8s.io/structured-merge-diff/v4 v4.4.1 // indirect
-	sigs.k8s.io/yaml v1.4.0 // indirect
+	k8s.io/klog/v2 v2.130.1
+	k8s.io/kube-openapi v0.0.0-20250710124328-f3f2b991d03b // indirect
+	sigs.k8s.io/json v0.0.0-20241014173422-cfa47c3a1cc8 // indirect
+	sigs.k8s.io/kustomize/api v0.20.1 // indirect
+	sigs.k8s.io/kustomize/kyaml v0.20.1 // indirect
+	sigs.k8s.io/yaml v1.6.0 // indirect
 )