[llvm] [GitHub][workflows] Add buildbot information comment to first merged PR from a new contributor (PR #78292)

[David Spickett via llvm-commits]

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@@ -0,0 +1,42 @@
+name: "Add buildbot information to first PRs from new contributors"
+
+permissions:
+  contents: read
+
+on:
+  # It's safe to use pull_request_target here, because we aren't checking out
+  # code from the pull request branch.
+  # See https://securitylab.github.com/research/github-actions-preventing-pwn-requests/
+  pull_request_target:
+    types:
+      - closed
+
+jobs:
+  buildbot_comment:
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+    if: >-
+      (github.repository == 'llvm/llvm-project') &&
+      (github.event.pull_request.merged == true)
+    steps:
+      - name: Checkout Automation Script
+        uses: actions/checkout at v4
+        with:
+          sparse-checkout: llvm/utils/git/
+          ref: main
+
+      - name: Setup Automation Script
+        working-directory: ./llvm/utils/git/
+        run: |
+          chmod a+x github-automation.py
----------------
DavidSpickett wrote:

I've used `python3`, if that's cool with you I'll do that for the other workflows in another PR.

https://github.com/llvm/llvm-project/pull/78292