add workflow to run script/update-enterprise-dates.js weekly (#19075)

.github/workflows/enterprise-dates.yml

@@ -0,0 +1,72 @@
+name: Enterprise date updater
+
+# **What it does**: Runs on a schedule to update lib/enterprise-dates.json.
+# **Why we have it**: The lib/enterprise-dates.json file needs to be up-to-date
+# for the .github/workflows/open-enterprise-issue.yml workflow and the
+# tests/content/algolia-search.js test.
+# **Who does it impact**: Docs engineering, docs content.
+
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: '39 2 * * 2' # At 02:39 on Tuesday
+
+# **IMPORTANT:** Do not change the FREEZE environment variable set here!
+# This workflow runs on a recurring basis. To temporarily disable it (e.g.,
+# during a docs deployment freeze), add an Actions Secret to the repo settings
+# called `FREEZE` with a value of `true`. To re-enable updates, simply
+# delete that Secret from the repo settings. The environment variable here
+# will duplicate that Secret's value for later evaluation.
+env:
+  FREEZE: ${{ secrets.FREEZE }}
+
+jobs:
+  open_enterprise_issue:
+    name: Enterprise date updater
+    if: github.repository == 'github/docs-internal'
+    runs-on: ubuntu-latest
+    steps:
+      - if: ${{ env.FREEZE == 'true' }}
+        run: |
+          echo 'The repo is currently frozen! Exiting this workflow.'
+          exit 1 # prevents further steps from running
+      - name: Run script/update-enterprise-dates.js
+        run: |
+          script/update-enterprise-dates.js
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - name: Create pull request
+        id: create-pull-request
+        uses: peter-evans/create-pull-request@8c603dbb04b917a9fc2dd991dc54fef54b640b43
+        with:
+          # need to use a token with repo and workflow scopes for this step
+          token: ${{ secrets.GITHUB_TOKEN }}
+          commit-message: '🤖 ran script/update-enterprise-dates.js'
+          title: 🤖 lib/enterprise-dates.json update
+          body:
+            "Hello! The GitHub Enterprise Server release dates have changed.\n\n
+            If CI passes, this PR will be auto-merged. :green_heart:\n\n
+            If CI does not pass or other problems arise, contact #docs-engineering on slack.\n\nThis PR was 🤖-crafted by `.github/workflows/enterprise-dates.yml`. 🧶"
+          labels: automerge,autoupdate
+          branch: enterprise-server-dates-update
+          delete-branch: true
+      - if: ${{ failure() }}
+        name: Delete remote branch (if previous steps failed)
+        uses: dawidd6/action-delete-branch@47743101a121ad657031e6704086271ca81b1911
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          branches: enterprise-server-dates-update
+      - if: ${{ steps.create-pull-request.outputs.pull-request-number }}
+        name: Approve
+        uses: juliangruber/approve-pull-request-action@c530832d4d346c597332e20e03605aa94fa150a8
+        with:
+          github-token: ${{ secrets.DOCUBOT_REPO_PAT }}
+          number: ${{ steps.create-pull-request.outputs.pull-request-number }}
+      - name: Send Slack notification if workflow fails
+        uses: someimportantcompany/github-actions-slack-message@0b470c14b39da4260ed9e3f9a4f1298a74ccdefd
+        if: failure()
+        with:
+          channel: ${{ secrets.DOCS_ALERTS_SLACK_CHANNEL_ID }}
+          bot-token: ${{ secrets.SLACK_DOCS_BOT_TOKEN }}
+          color: failure
+          text: The last enterprise-dates run for ${{github.repository}} failed. See https://github.com/github/${{github.repository}}/actions/workflows/enterprise-dates.yml