Add krel validate cmd

cmd/krel/cmd/testdata/validation-data/invalid-indent.yaml

@@ -0,0 +1,10 @@
+pr: 126108
+releasenote:
+  text: |-
+    Reduced state change noise when volume expansion fails. Also mark certain failures as infeasible.
+
+  ACTION REQUIRED:  If you are using the `RecoverVolumeExpansionFailure` alpha feature gate
+  then after upgrading to this release, you need to update some objects.
+  For any existing PersistentVolumeClaimss with `status.allocatedResourceStatus` set to either
+  "ControllerResizeFailed" or "NodeResizeFailed", clear the `status.allocatedResourceStatus`.
+pr_body: ""

cmd/krel/cmd/testdata/validation-data/invalid-multi-line.yaml

@@ -0,0 +1,5 @@
+pr: 125163
+releasenote:
+  text: 'ACTION REQUIRED: The Dynamic Resource Allocation (DRA) driver's DaemonSet must be deployed
+          with a service account that enables writing ResourceSlice and reading ResourceClaim
+          objects.'

cmd/krel/cmd/testdata/validation-data/invalid-yaml-start.yaml

@@ -0,0 +1,3 @@
+pr: 125157
+releasenote:
+  text: `kubeadm`: The `NodeSwap` check that kubeadm performs during preflight, has a new warning to verify if swap has been configured correctly.

cmd/krel/cmd/testdata/validation-data/missing-punctuation.yaml

@@ -0,0 +1,4 @@
+pr: 125157
+releasenote:
+  text: "`kubeadm`: The `NodeSwap` check that kubeadm performs during preflight, has a new warning to verify if swap has been configured correctly"
+pr_body: ""

cmd/krel/cmd/testdata/validation-data/valid.yaml

@@ -0,0 +1,4 @@
+pr: 125157
+releasenote:
+  text: "`kubeadm`: The `NodeSwap` check that kubeadm performs during preflight, has a new warning to verify if swap has been configured correctly."
+pr_body: ""

cmd/krel/cmd/validate.go

@@ -0,0 +1,154 @@
+/*
+Copyright 2024 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package cmd
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+	"regexp"
+	"strings"
+
+	"github.com/spf13/cobra"
+
+	"sigs.k8s.io/yaml"
+
+	"k8s.io/release/pkg/notes"
+)
+
+func init() {
+	// Add the validation subcommand to the release-notes command
+	releaseNotesCmd.AddCommand(validateCmd)
+}
+
+// validate represents the subcommand for `krel release-notes validate`.
+var validateCmd = &cobra.Command{
+	Use:   "validate",
+	Short: "The subcommand for validating release notes for the Release Notes subteam of SIG Release",
+	Long: `krel release-notes validate <path-to-release-notes-maps>
+
+The 'validate' subcommand of krel has been developed to:
+
+1. Check release notes maps for valid yaml.
+
+2. Check release notes maps for valid punctuation.`,
+	SilenceUsage:  true,
+	SilenceErrors: true,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		// Ensure exactly one argument is provided
+		if len(args) != 1 {
+			return fmt.Errorf("exactly one argument is required for release-notes validate, but got %d", len(args))
+		}
+
+		// Extract the release notes path from args
+		releaseNotesPath := args[0]
+
+		// Run the PR creation function
+		return runValidateReleaseNotes(releaseNotesPath)
+	},
+}
+
+func runValidateReleaseNotes(releaseNotesPath string) (err error) {
+	// Ensure the path is not empty
+	if releaseNotesPath == "" {
+		return errors.New("release notes path cannot be empty")
+	}
+
+	// Check if the directory exists
+	if _, err := os.Stat(releaseNotesPath); os.IsNotExist(err) {
+		return fmt.Errorf("release notes path %s does not exist", releaseNotesPath)
+	}
+
+	// Validate the YAML files in the directory
+	err = filepath.Walk(releaseNotesPath, func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+		// Only process YAML files
+		if filepath.Ext(path) == ".yaml" || filepath.Ext(path) == ".yml" {
+			fmt.Printf("Validating YAML file: %s\n", path)
+
+			// Validate YAML
+			if err := ValidateYamlMap(path); err != nil {
+				return fmt.Errorf("validating YAML file %s: %w", path, err)
+			}
+
+			fmt.Printf("YAML file %s is valid.\n", path)
+		}
+		return nil
+	})
+	if err != nil {
+		return fmt.Errorf("validating release notes: %w", err)
+	}
+
+	fmt.Println("All release notes are valid.")
+	return nil
+}
+
+// ValidateYamlMap reads a YAML map file, unmarshals it into a map, and then re-marshals it
+// to validate the correctness of the content.
+func ValidateYamlMap(filePath string) error {
+	// Read the YAML file
+	data, err := os.ReadFile(filePath)
+	if err != nil {
+		return fmt.Errorf("reading file %s: %w", filePath, err)
+	}
+
+	// Unmarshal the YAML data into a map for manipulation and validation
+	var testMap notes.ReleaseNotesMap
+	if err := yaml.Unmarshal(data, &testMap); err != nil {
+		return fmt.Errorf("YAML unmarshaling %s: %w", filePath, err)
+	}
+
+	// Check the map for valid punctuation in the "text" field
+	if err := validateTextFieldPunctuation(&testMap); err != nil {
+		return fmt.Errorf("punctuation check for file %s: %w", filePath, err)
+	}
+
+	// TODO: Add custom validation checks (tense, grammar, spelling, etc.) https://github.com/kubernetes/release/issues/3767
+
+	// Re-marshall the YAML to check if it can be successfully serialized again
+	_, err = yaml.Marshal(testMap)
+	if err != nil {
+		return fmt.Errorf("while re-marshaling map for file %s:%w", filePath, err)
+	}
+
+	fmt.Printf("File %s is valid YAML.\n", filePath)
+	return nil
+}
+
+// validateTextFieldPunctuation checks if the "text" field in a YAML map
+// ends with valid punctuation (., !, ?).
+func validateTextFieldPunctuation(data *notes.ReleaseNotesMap) error {
+	validPunctuation := regexp.MustCompile(`[.!?]$`)
+
+	if data == nil {
+		return errors.New("the release notes map is nil")
+	}
+
+	if data.ReleaseNote.Text == nil {
+		return errors.New("the 'text' release notes map field is nil")
+	}
+
+	text := *data.ReleaseNote.Text
+	if !validPunctuation.MatchString(strings.TrimSpace(text)) {
+		return fmt.Errorf("the 'text' field does not end with valid punctuation: '%s'", text)
+	}
+
+	return nil
+}

cmd/krel/cmd/validate_test.go

@@ -0,0 +1,57 @@
+/*
+Copyright 2024 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package cmd
+
+import (
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestRunValidateReleaseNotes(t *testing.T) {
+	testDataPath := "testdata/validation-data"
+
+	// Valid YAML returns no error
+	err := runValidateReleaseNotes(filepath.Join(testDataPath, "valid.yaml"))
+	assert.NoError(t, err, "Expected no error for valid YAML file")
+
+	// Try a non-existent path
+	err = runValidateReleaseNotes("nonexistent/path")
+	assert.Error(t, err, "Expected error for non-existent path")
+	assert.Contains(t, err.Error(), "does not exist", "Error should be about non-existent path")
+
+	// Missing punctuation YAML returns error
+	err = runValidateReleaseNotes(filepath.Join(testDataPath, "missing-punctuation.yaml"))
+	assert.Error(t, err, "Expected error for missing punctuation YAML file")
+	assert.Contains(t, err.Error(), "field does not end with valid punctuation", "Error should be about missing punctuation")
+
+	// Try invalid yaml starting with "`"
+	err = runValidateReleaseNotes(filepath.Join(testDataPath, "invalid-yaml-start.yaml"))
+	assert.Error(t, err, "Expected error for invalid yaml")
+	assert.Contains(t, err.Error(), "YAML unmarshaling testdata/validation-data/invalid-yaml-start", "Error should be about invalid yaml")
+
+	// Try invalid multi line yaml
+	err = runValidateReleaseNotes(filepath.Join(testDataPath, "invalid-multi-line.yaml"))
+	assert.Error(t, err, "Expected error for invalid yaml")
+	assert.Contains(t, err.Error(), "YAML unmarshaling testdata/validation-data/invalid-multi-line.yaml", "Error should be about invalid yaml")
+
+	// Try invalid indent
+	err = runValidateReleaseNotes(filepath.Join(testDataPath, "invalid-indent.yaml"))
+	assert.Error(t, err, "Expected error for invalid yaml")
+	assert.Contains(t, err.Error(), "YAML unmarshaling testdata/validation-data/invalid-indent.yaml", "Error should be about invalid yaml")
+}