WIP: notify about release PR

.github/workflows/build_and_test.yml

@@ -6,7 +6,7 @@ on:
       - main
       - release
       - ci-run/pr-*
-  pull_request:
+  # pull_request:
 
 defaults:
   run:

.github/workflows/release-notify.yml

@@ -0,0 +1,93 @@
+# This workflow notifies Slack channel about upcoming releases.
+
+name: Notify Slack channel about upcoming release
+
+on:
+  pull_request:
+    # branches:
+    #   - release
+
+jobs:
+  notify:
+    runs-on: [ ubuntu-latest ]
+
+    steps:
+      - uses: actions/github-script@v6
+        id: commitlist
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          retries: 5
+          result-encoding: string
+          script: |
+            // Slack Message layout is created with https://app.slack.com/block-kit-builder
+
+            const linkify = function (text) {
+              return text.replace(/#(\d+)/g, (match, prNumber) => { return `<${context.serverUrl}/${context.repo.owner}/${context.repo.repo}/pulls/${prNumber}|#${prNumber}>` })
+            }
+
+            const { data: pullRequest } = await github.rest.pulls.get({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              // pull_number: context.payload.number,
+              // Try real release PR
+              pull_number: 5202
+            });
+
+            const header = `"${pullRequest.title}" is coming :tada:`
+
+            const { data: commits } = await github.rest.pulls.listCommits({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              // pull_number: context.payload.number,
+              // Try real release PR
+              pull_number: 5202
+            });
+
+            const blocks = []
+            blocks.push({
+              type: "header",
+              text: {
+                type: "plain_text",
+                text: header,
+              },
+            })
+
+            blocks.push({
+              type: "context",
+              elements: [
+                {
+                  type: "mrkdwn",
+                  text: `<${context.serverUrl}/${context.repo.owner}/${context.repo.repo}/pulls/${context.payload.number}|Release PR>`,
+                },
+              ],
+            })
+
+            for (const commit of commits) {
+              const message = commit.commit.message.replace(/\r\n/g, "\n")
+              const title = message.split("\n\n", 1)[0]
+
+              blocks.push({
+                type: "section",
+                text: {
+                  type: "mrkdwn",
+                  text: `- ${linkify(title)}`,
+                },
+              })
+            }
+
+            const slackMessage = {
+              text: header,
+              blocks,
+            }
+
+            console.log(JSON.stringify(slackMessage, null, 2))
+
+            return JSON.stringify(slackMessage)
+
+      - uses: slackapi/slack-github-action@v1
+        env:
+          SLACK_BOT_TOKEN: ${{ secrets.SLACK_BOT_TOKEN }}
+        with:
+          channel-id: "C05QQ9J1BRC" # #test-release-notifications
+          payload: ${{ steps.commitlist.outputs.result }}