add PR Gatekeeper (#12646)

* add PR Gatekeeper

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Apply suggestions from code review

Co-authored-by: Carlos Mocholí <carlossmocholi@gmail.com>

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Carlos Mocholí <carlossmocholi@gmail.com>

.github/CODEOWNERS

@@ -54,6 +54,7 @@
 /tests/helpers/boring_model.py          @williamfalcon @tchaton @borda
 
 /.github/CODEOWNERS              @williamfalcon
+/.github/approve_config.yml      @williamfalcon
 /SECURITY.md                     @williamfalcon
 /README.md                       @williamfalcon @edenlightning @borda
 /setup.py                        @williamfalcon @borda

.github/approve_config.yml

@@ -0,0 +1,17 @@
+approvals:
+  # check will fail if there is no approval
+  minimum: 1
+  groups:
+    - name: GridAI
+      minimum: 1
+      from:
+        - awaelchli
+        - Borda
+        - carmocca
+        - edenlightning
+        - ethanwharris
+        - kaushikb11
+        - krshrimali
+        - rohitgr7
+        - tchaton
+        - williamFalcon

.github/workflows/ci_pr-gatekeeper.yml

@@ -0,0 +1,25 @@
+name: 'PR Gatekeeper'
+
+on:
+  pull_request:
+    types:
+      [
+        assigned,
+        unassigned,
+        opened,
+        reopened,
+        synchronize,
+        review_requested,
+        review_request_removed
+      ]
+  pull_request_review:
+
+jobs:
+  pr-gatekeeper:
+    name: PR Gatekeeper
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: octodemo/pr-gatekeeper@main
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}