Add changelog validation workflow for release PRs

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- Add changelog validation workflow for release PRs.
+
 ## [7.3.0] - 2025-06-24
 
 ## [7.2.7] - 2025-06-11

cmd/gen/workflows/runner.go

@@ -55,6 +55,7 @@ func (r *runner) run(ctx context.Context, cmd *cobra.Command, args []string) err
 	inputs := []input.Input{
 		workflowsInput.CreateRelease(),
 		workflowsInput.CreateReleasePR(),
+		workflowsInput.ValidateChangelog(),
 	}
 
 	if r.flag.Language == "go" {

pkg/gen/input/workflows/internal/file/validate_changelog.go

@@ -0,0 +1,31 @@
+package file
+
+import (
+	_ "embed"
+
+	"github.com/giantswarm/devctl/v7/pkg/gen/input"
+	"github.com/giantswarm/devctl/v7/pkg/gen/input/workflows/internal/params"
+)
+
+//go:embed validate_changelog.yaml.template
+var validateChangelogTemplate string
+
+//go:generate go run ../../../update-template-sha.go validate_changelog.yaml.template
+//go:embed validate_changelog.yaml.template.sha
+var validateChangelogTemplateSha string
+
+func NewValidateChangelogInput(p params.Params) input.Input {
+	i := input.Input{
+		Path:         params.RegenerableFileName(p, "validate_changelog.yaml"),
+		TemplateBody: validateChangelogTemplate,
+		TemplateDelims: input.InputTemplateDelims{
+			Left:  "{{{{",
+			Right: "}}}}",
+		},
+		TemplateData: map[string]interface{}{
+			"Header": params.Header("#", validateChangelogTemplateSha),
+		},
+	}
+
+	return i
+}

pkg/gen/input/workflows/internal/file/validate_changelog.yaml.template

@@ -0,0 +1,34 @@
+{{{{ .Header }}}}
+name: Validate changelog
+
+on:
+  workflow_call:
+  pull_request:
+    types: [opened, synchronize, reopened]
+    paths:
+      - 'CHANGELOG.md'
+    branches:
+      - 'legacy#release#v*.*.*'
+      - 'main#release#v*.*.*'
+      - 'main#release#major'
+      - 'main#release#minor'
+      - 'main#release#patch'
+      - 'master#release#v*.*.*'
+      - 'master#release#major'
+      - 'master#release#minor'
+      - 'master#release#patch'
+      - 'release#v*.*.*'
+      - 'release#major'
+      - 'release#minor'
+      - 'release#patch'
+      - 'release-v*.*.x#release#v*.*.*'
+      # "!" negates previous positive patterns so it has to be at the end.
+      - '!release-v*.x.x#release#v*.*.*'
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  validate-changelog:
+    uses: giantswarm/github-workflows/.github/workflows/validate-changelog.yaml@3681e34c08ca044821ef7c1c037cf8b859194777

pkg/gen/input/workflows/workflows.go

@@ -83,3 +83,7 @@ func (w *Workflows) RunOSSFScorecard() input.Input {
 func (w *Workflows) UpdateChart() input.Input {
 	return file.NewUpdateChartInput(w.params)
 }
+
+func (w *Workflows) ValidateChangelog() input.Input {
+	return file.NewValidateChangelogInput(w.params)
+}