From 917722ac717c61b709539fe885fbe3a7291cfb2d Mon Sep 17 00:00:00 2001
From: "Eric T. Johnson" <eric.t.johnson@stonybrook.edu>
Date: Tue, 12 Nov 2024 15:30:03 -0500
Subject: [PATCH] Add GH actions workflow to replace mergeable bot

---
 .github/mergeable.yml                         | 13 -------
 .github/workflows/check-title-and-labels.yaml | 37 +++++++++++++++++++
 2 files changed, 37 insertions(+), 13 deletions(-)
 delete mode 100644 .github/mergeable.yml
 create mode 100644 .github/workflows/check-title-and-labels.yaml

diff --git a/.github/mergeable.yml b/.github/mergeable.yml
deleted file mode 100644
index 0fa89860041..00000000000
--- a/.github/mergeable.yml
+++ /dev/null
@@ -1,13 +0,0 @@
-# config file for mergeable: https://github.com/mergeability/mergeable
-version: 2
-mergeable:
-  - when: pull_request.*
-    validate:
-      - do: title
-        must_exclude:
-          regex: ^\[?WIP\b
-          message: "WIP pull requests can't be merged."
-      - do: label
-        must_include:
-          regex: 'bug|enhancement|new feature|docs|infrastructure|dead code|refactor'
-          message: "Please label this pull request with one of: bug, enhancement, new feature, docs or infrastructure."
diff --git a/.github/workflows/check-title-and-labels.yaml b/.github/workflows/check-title-and-labels.yaml
new file mode 100644
index 00000000000..8d45d3997f0
--- /dev/null
+++ b/.github/workflows/check-title-and-labels.yaml
@@ -0,0 +1,37 @@
+# based on https://stackoverflow.com/a/75036059 and
+# https://github.com/astropy/astropy/blob/main/.github/workflows/check_milestone.yml
+name: Check PR title and labels
+
+on:
+  # So it cannot be skipped.
+  pull_request_target:
+    types: [opened, edited, synchronize, labeled, unlabeled]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref }}
+  cancel-in-progress: true
+
+jobs:
+  check-title:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/github-script@v7
+        with:
+          script: |
+            if (/^\[?WIP\b/i.test(context.payload.pull_request.title)) {
+              core.setFailed("WIP pull requests can't be merged.");
+            }
+
+  check-labels:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/github-script@v7
+        with:
+          script: |
+            const requiredLabels = ['bug', 'enhancement', 'new feature', 'docs', 'infrastructure', 'dead code', 'refactor'];
+            let labels = context.payload.pull_request.labels;
+
+            core.info(`Current labels: ${labels.map(l => l.name).join(', ')}`);
+            if (labels.filter(l => requiredLabels.includes(l.name)).length === 0) {
+              core.setFailed('Please label this pull request with one of: bug, enhancement, new feature, docs or infrastructure.');
+            }