From cd2ccb217c0cd42f12d66d6e56272f597f675126 Mon Sep 17 00:00:00 2001
From: Ufuk Kayserilioglu <ufuk.kayserilioglu@shopify.com>
Date: Tue, 13 Feb 2024 01:44:25 +0200
Subject: [PATCH] Add PR label action

---
 .github/workflows/pr-labels.yml | 57 +++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 .github/workflows/pr-labels.yml

diff --git a/.github/workflows/pr-labels.yml b/.github/workflows/pr-labels.yml
new file mode 100644
index 0000000000..a702f15c9d
--- /dev/null
+++ b/.github/workflows/pr-labels.yml
@@ -0,0 +1,57 @@
+name: Pull Request Labels
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened, labeled, unlabeled]
+
+jobs:
+  check-labels:
+    runs-on: ubuntu-latest
+    env:
+      GH_TOKEN: ${{ github.token }}
+    steps:
+      - uses: actions/checkout@v4
+      - name: Check for Pull Request Labels
+        run: |
+          REQUIRED_LABELS=("documentation" "bugfix" "chore" "enhancement" "ignore-for-release" "security" "sorbet")
+          LABELS=$(gh pr view --json labels --jq ".labels[] .name" ${{ github.event.pull_request.number }})
+
+          errorMessage=""
+          if [ -z "$LABELS" ]; then
+            echo "No labels found on PR"
+            errorMessage="No labels found on PR"
+          else
+            matched=0
+            for label in $LABELS; do
+              if [[ "${REQUIRED_LABELS[@]}" =~ "${label}" ]]; then
+                matched=1
+                echo "Matched label $label"
+                break
+              fi
+            done
+
+            if [ $matched -eq 0 ]; then
+              echo "No matching required labels found on PR"
+              errorMessage="No matching label found"
+            fi
+          fi
+
+          if [ -n "$errorMessage" ]; then
+            echo "### Pull Request Labels" > comment.md
+            echo "" >> comment.md
+            echo "Error: `$errorMessage`" >> comment.md
+            echo "" >> comment.md
+            echo "Please add one of the following labels to your pull request:" >> comment.md
+            echo "`${REQUIRED_LABELS[@]}`" >> comment.md
+            echo "" >> comment.md
+            gh pr comment ${{ github.event.pull_request.number }} --body-file comment.md --edit-last
+            exit 1
+          else
+            echo "All required labels found on PR"
+            commentId=$(gh pr view -c --json comments --jq ".comments | reverse[] | select(.viewerDidAuthor == true) | .id" ${{ github.event.pull_request.number }})
+            if [ -n "$commentId" ]; then
+              echo "Deleting previous comment: /repos/${{ github.repository }}/issues/comments/$commentId"
+              gh api -X DELETE /repos/${{ github.repository }}/issues/comments/$commentId
+            fi
+          fi
+        shell: bash