Add release publishing workflow

.github/workflows/publish-release.yml

@@ -0,0 +1,89 @@
+---
+name: Publish Release
+
+on:
+  workflow_dispatch:
+    inputs:
+      draft:
+        description: "If true, creates the release as a draft."
+        required: false
+        type: boolean
+        default: false
+      version:
+        description: "The optional version number to use for the release."
+        required: false
+        type: string
+        default: ""
+
+permissions: {}
+
+jobs:
+  release:
+    runs-on: [ubuntu-latest]
+
+    concurrency:
+      group: ${{ github.workflow }}
+      cancel-in-progress: false
+
+    permissions:
+      contents: read
+      id-token: write
+
+    steps:
+      - name: Get GitHub token
+        id: get-token
+        uses: grafana/shared-workflows/actions/create-github-app-token@ae92934a14a48b94494dbc06d74a81d47fe08a40 # v0.2.2
+        with:
+          github_app: grafana-otel-bot
+          permission_set: default
+
+      - name: Get version
+        id: get-version
+        shell: pwsh
+        env:
+          GH_TOKEN: ${{ steps.get-token.outputs.token }}
+          NEXT_VERSION: ${{ inputs.version }}
+        run: |
+          if (-Not [string]::IsNullOrEmpty(${env:NEXT_VERSION})) {
+            $nextVersion = [System.Version]::new(${env:NEXT_VERSION}.TrimStart('v'))
+          } else {
+            $latestUrl = "${env:GITHUB_API_URL}/repos/${env:GITHUB_REPOSITORY}/releases/latest"
+            $headers = @{
+              Authorization = "Bearer ${env:GH_TOKEN}";
+              Accept = "application/vnd.github+json";
+            }
+            $latest = (Invoke-RestMethod -Uri $latestUrl -Headers $headers -ErrorAction Stop).tag_name.TrimStart('v')
+            $currentVersion = [System.Version]::new($latest)
+            $nextVersion = [System.Version]::new($currentVersion.Major, $currentVersion.Minor, $currentVersion.Build + 1)
+          }
+
+          $releaseVersion = $nextVersion.ToString()
+          "version=${releaseVersion}" >> ${env:GITHUB_OUTPUT}
+
+      - name: Create release
+        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
+        env:
+          DEFAULT_BRANCH: ${{ github.event.repository.default_branch }}
+          DRAFT: ${{ inputs.draft == true }}
+          VERSION: ${{ steps.get-version.outputs.version }}
+        with:
+          github-token: ${{ steps.get-token.outputs.token }}
+          script: |
+            const { repo, owner } = context.repo;
+            const draft = process.env.DRAFT === 'true';
+            const version = process.env.VERSION;
+            const tag_name = `v${version}`;
+            const target_commitish = process.env.DEFAULT_BRANCH;
+            const name = tag_name;
+
+            const { data: release } = await github.rest.repos.createRelease({
+              owner,
+              repo,
+              tag_name,
+              target_commitish,
+              name,
+              draft,
+              generate_release_notes: true,
+            });
+
+            core.notice(`Created release ${release.name}: ${release.html_url}`);

RELEASING.md

@@ -1,7 +1,18 @@
 # Releasing
 
-1. Go to <https://github.com/grafana/docker-otel-lgtm/releases/new>
-2. Click on "Choose a tag", enter the tag name (e.g. `v0.1.0`), and click "Create a new tag".
-3. Click on "Generate release notes" to auto-generate the release notes based on
-   the commits since the last release.
-4. Click on "Publish release".
+1. Open the [Publish Release workflow][publish-release]
+2. Click on the **Run workflow** button
+3. If required, enter a specific version number (e.g. `1.2.3`) in the version field. If left
+   blank, the version will be auto-incremented to the next patch version based on the
+   [latest release][latest-release].
+4. Wait for the workflow to complete successfully.
+5. Click the link in the workflow run summary to the untagged release created by the workflow.
+6. Click the edit button (pencil icon) at the top right of the release notes.
+7. Verify that the release notes are correct. Make any manual adjustments if necessary.
+8. Click on **Publish release**.
+
+<!-- editorconfig-checker-disable -->
+<!-- markdownlint-disable MD013 -->
+
+[latest-release]: https://github.com/grafana/docker-otel-lgtm/releases/latest
+[publish-release]: https://github.com/grafana/docker-otel-lgtm/actions/workflows/publish-release.yml