improvement: automate changelog management

.chglog/CHANGELOG.tpl.md

@@ -0,0 +1,66 @@
+# Change Log
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/) and this
+project adheres to [Semantic Versioning](http://semver.org/).
+
+{{ if .Versions -}}
+<a name="unreleased"></a>
+## [Unreleased]
+{{ if .Unreleased.CommitGroups -}}
+{{ range .Unreleased.CommitGroups -}}
+{{ .Title }}:
+{{ range .Commits -}}
+{{- if .Subject -}}
+- {{ if .Scope }}**{{ .Scope }}:** {{ end }}{{ .Subject }}
+{{- end -}}
+{{ end }}
+{{ end -}}
+{{ else }}
+{{ range .Unreleased.Commits -}}
+{{- if .Subject -}}
+- {{ if .Scope }}**{{ .Scope }}:** {{ end }}{{ .Subject }}
+{{- end -}}
+{{ end }}
+{{ end -}}
+{{ end -}}
+
+{{ range .Versions }}
+<a name="{{ .Tag.Name }}"></a>
+## {{ if .Tag.Previous }}[{{ .Tag.Name }}]{{ else }}{{ .Tag.Name }}{{ end }} - {{ datetime "2006-01-02" .Tag.Date }}
+{{ if .CommitGroups -}}
+{{ range .CommitGroups -}}
+{{ .Title }}:
+{{ range .Commits -}}
+{{- if .Subject -}}
+- {{ if .Scope }}**{{ .Scope }}:** {{ end }}{{ .Subject }}
+{{- end -}}
+{{ end }}
+{{ end -}}
+{{ else }}
+{{ range .Commits -}}
+{{- if .Subject -}}
+- {{ if .Scope }}**{{ .Scope }}:** {{ end }}{{ .Subject }}
+{{- end -}}
+{{ end }}
+{{ end -}}
+
+{{- if .NoteGroups -}}
+{{ range .NoteGroups -}}
+{{ .Title }}:
+{{ range .Notes }}
+{{ .Body }}
+{{ end }}
+{{ end -}}
+{{ end -}}
+{{ end -}}
+
+{{- if .Versions }}
+[Unreleased]: {{ .Info.RepositoryURL }}/compare/{{ $latest := index .Versions 0 }}{{ $latest.Tag.Name }}...HEAD
+{{ range .Versions -}}
+{{ if .Tag.Previous -}}
+[{{ .Tag.Name }}]: {{ $.Info.RepositoryURL }}/compare/{{ .Tag.Previous.Name }}...{{ .Tag.Name }}
+{{ end -}}
+{{ end -}}
+{{ end -}}

.chglog/config.yml

@@ -0,0 +1,48 @@
+style: github
+template: CHANGELOG.tpl.md
+info:
+  title: CHANGELOG
+  repository_url: https://github.com/terraform-aws-modules/terraform-aws-eks
+options:
+
+  commits:
+    sort_by: Type
+    filters:
+      Type:
+        - feat
+        - fix
+        - improvement
+        - docs
+        - refactor
+        - test
+        - ci
+        - chore
+
+  commit_groups:
+    group_by: Type
+    title_maps:
+      feat: FEATURES
+      fix: BUG FIXES
+      improvement: ENHANCEMENTS
+      docs: DOCS
+      refactor: REFACTORS
+      test: TESTS
+      ci: CI
+      chore: CHORES
+
+  header:
+    pattern: "^(\\.+)\\s*:\\s*(.+)$"
+    pattern_maps:
+      - Type
+      - Subject
+
+  notes:
+    keywords:
+      - BREAKING CHANGE
+      - NOTES
+
+  refs:
+    actions:
+      - Closes
+      - Fixes
+      - Resolves

.github/CONTRIBUTING.md

@@ -0,0 +1,34 @@
+# Contributing
+
+When contributing to this repository, please first discuss the change you wish to make via issue,
+email, or any other method with the owners of this repository before making a change.
+
+Please note we have a code of conduct, please follow it in all your interactions with the project.
+
+## Pull Request Process
+
+1.  Ensure any install or build dependencies are removed before the end of the layer when doing a build.
+2.  Update the README.md with details of changes to the interface, this includes new environment variables, exposed ports, useful file locations and container parameters.
+3. Once all outstanding comments and checklist items have been addressed, your contribution will be merged! Merged PRs will be included in the next release. The terraform-aws-eks mainteners takes care of updating the CHANGELOG as they merge.
+
+## Checklists for contributions
+
+- [ ] Add [sementics prefix](#semantic-pull-requests) to your PR or Commits (at leats one of your commit groups)
+- [ ] CI tests are passing
+- [ ] README.md has been updated after any changes to variables and outputs. See https://github.com/terraform-aws-modules/terraform-aws-eks/#doc-generation
+
+## Semantic Pull Requests
+
+To generate changelog, Pull Requests or Commits must have sementic and must follow conventional specs below:
+
+- `feat:` for new features
+- `fix:` for bug fixes
+- `improvement:` for enhancements
+- `docs:` for documentation and examples
+- `refactor:` for code refactoring
+- `test:` for tests
+- `ci:` for CI purpose
+- `chore:` for chores stuff
+
+There is a special prefix `skip changelog` which is skipped during changelog generation. It can be used for `skip changelog: update changelog` commit message by example.
+

.github/PULL_REQUEST_TEMPLATE.md

@@ -6,6 +6,5 @@ Please explain the changes you made here and link to any relevant issues.
 
 ### Checklist
 
-- [ ] Change added to CHANGELOG.md. All changes must be added and breaking changes and highlighted
 - [ ] CI tests are passing
 - [ ] README.md has been updated after any changes to variables and outputs. See https://github.com/terraform-aws-modules/terraform-aws-eks/#doc-generation

.github/semantic.yml

@@ -0,0 +1,14 @@
+# By default types specified in commitizen/conventional-commit-types is used.
+# See: https://github.com/commitizen/conventional-commit-types/blob/v2.3.0/index.json
+# You can override the valid types
+types:
+  - feat
+  - fix
+  - improvement
+  - docs
+  - refactor
+  - test
+  - ci
+  - chore
+  - skip changelog
+  - skip ci

.github/workflows/changelog-check.yaml

@@ -0,0 +1,20 @@
+name: CHANGELOG Checks
+on:
+  pull_request:
+    paths:
+      - CHANGELOG.md
+
+jobs:
+  changelog-check:
+    name: CHANGELOG Check
+    runs-on: ubuntu-latest
+    steps:
+      - name: Fail the check if changelog change
+        run: |-
+          echo "Thank you for your contribution!"
+          echo ""
+          echo "The 'CHANGELOG.md' file contents are handled by the maintainers during merge. This is to prevent pull request merge conflicts."
+          echo "Please see the Contributing Guide for additional pull request review items."
+          echo ""
+          echo "Remove any changes to the 'CHANGELOG.md' file and commit them in this pull request."
+          exit 1