Add release flow workflows

.github/release-drafter.yml

@@ -0,0 +1,37 @@
+# https://github.com/release-drafter/release-drafter?tab=readme-ov-file#configuration-options
+template: |
+  $CHANGES
+
+  **Full Changelog**: https://github.com/$OWNER/$REPOSITORY/compare/$PREVIOUS_TAG...v$RESOLVED_VERSION
+name-template: 'oblt-actions v$RESOLVED_VERSION'
+tag-template: 'v$RESOLVED_VERSION'
+change-template: '- $TITLE by @$AUTHOR in #$NUMBER'
+categories:
+  - title: '💥 Breaking Changes'
+    labels:
+      - 'changelog:breaking' # When a breaking change is introduced
+  - title: '✨ Features'
+    labels:
+      - 'changelog:feature' # When a new feature is introduced
+      - 'changelog:enhancement' # When an existing feature is improved
+  - title: '🐛 Bug Fixes'
+    labels:
+      - 'changelog:fix' # When a bug is fixed
+  - title: '📝 Documentation'
+    labels:
+      - 'changelog:docs' # When documentation is updated
+  - title: '🧰 Maintenance'
+    labels:
+      - 'changelog:chore' # When a chore is done
+      - 'changelog:ci' # When CI is updated
+      - 'changelog:dependencies' # When dependencies are updated
+exclude-labels:
+  - 'changelog:skip' # When a PR should be excluded from the changelog
+version-resolver:
+  major:
+    labels:
+      - 'changelog:breaking'
+  minor:
+    labels:
+      - 'changelog:feature'
+  default: patch

.github/workflows/create-major-tag.yml

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+name: create-major-tag
+
+on:
+  release:
+    types:
+      - published
+
+permissions:
+  contents: write
+
+jobs:
+  create-major-tag:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Get major version
+        run: |
+          MAJOR_VERSION=$(echo "${GITHUB_REF#refs/tags/v}" | awk -F. '{print $1}')
+          echo "MAJOR_VERSION=${MAJOR_VERSION}" >> "${GITHUB_ENV}"
+      - name: Create major tag
+        run: |
+          git tag "v${MAJOR_VERSION}"
+          git push -f origin "refs/tags/v${MAJOR_VERSION}"

.github/workflows/release-drafter.yml

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+name: release-drafter
+
+on:
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: read
+
+jobs:
+  update-release-draft:
+    permissions:
+      contents: write
+      pull-requests: read
+    runs-on: ubuntu-latest
+    steps:
+      - uses: release-drafter/release-drafter@3f0f87098bd6b5c5b9a36d49c41d998ea58f9348 # v6.0.0
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/required-labels.yml

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+name: required-labels
+
+on:
+  pull_request_target:
+    types:
+      - opened
+      - labeled
+      - unlabeled
+      - synchronize
+
+permissions:
+  contents: read
+
+jobs:
+  check-labels:
+    permissions:
+      contents: read
+      pull-requests: write
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - id: get-labels
+        run: |
+          labels=$(yq '[.categories[].labels] + .exclude-labels | flatten | unique | sort | @tsv' .github/release-drafter.yml | tr '\t' ',')
+          echo "labels=$labels" >> "${GITHUB_OUTPUT}"
+      - id: check-labels
+        uses: mheap/github-action-required-labels@5847eef68201219cf0a4643ea7be61e77837bbce # v5.4.1
+        with:
+          mode: exactly
+          count: 1
+          use_regex: false
+          add_comment: true
+          labels: ${{ steps.get-labels.outputs.labels }}

README.md

@@ -1,5 +1,9 @@
 # GitHub Actions for Elastic Observability projects
 
-TBD
+This repository contains GitHub Actions for Elastic Observability projects.
+
+## Releasing
+
+See [RELEASE.md](docs/RELEASE.md) for the release process.
 
 <sup><br>Made with ♥️ and ☕️ by Elastic and our community.</sup>

docs/RELEASE.md

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+# Release Process
+
+This document outlines the process for releasing a new version of this project.
+
+## Versioning
+
+This project uses [Semantic Versioning](https://semver.org/) and its version is
+automatically determined by [release-drafter](https://github.com/release-drafter/release-drafter)
+based on the labels of the pull requests merged into the `main` branch.
+
+See the [release-drafter configuration](../.github/release-drafter.yml) for more details.
+
+## Creating a New Release
+
+Every time a pull request is merged into the `main` branch, release-drafter will
+create a draft release or update the existing draft release in the [Releases](https://github.com/elastic/oblt-actions/releases) page.
+
+To create a new release you need to publish the existing draft release created by release-drafter.
+
+> [!IMPORTANT]
+> Make sure the [release-drafter workflow](../.github/workflows/release-drafter.yml) is finished before publishing the release.
+
+> [!NOTE]
+> When a release is published, the [create-major-tag workflow](../.github/workflows/create-major-tag.yml)
+> will force push a new major tag in the format `vX` where `X` is the major version of the release.
+> For example, if the release is `v1.2.3` was published, the workflow will force push a new tag `v1` on the same commit.