chore(ci): add label workflow

.github/workflows/label.yaml

@@ -0,0 +1,82 @@
+name: Label Pull Requests
+
+on:
+  pull_request:
+    types:
+      - opened
+      - reopened
+      - unlabeled
+
+permissions:
+  pull-requests: write
+
+jobs:
+  external-contributor:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check Author Association and Label PR
+        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          script: |
+            const pr = context.payload.pull_request;
+            if (!pr) {
+              console.log("Could not get PR from context");
+              return;
+            }
+
+            // Define associations considered "internal"
+            const internalAssociations = ["MEMBER"];
+
+            // Label to add if the author is external
+            const externalLabel = "external-contributor";
+
+            const authorAssociation = pr.author_association;
+            const isExternal = !internalAssociations.includes(authorAssociation);
+
+            const prLabels = pr.labels.map(label => label.name);
+            const hasExternalLabel = prLabels.includes(externalLabel);
+
+            console.log(`Event: ${context.eventName}, Action: ${context.payload.action}`);
+            console.log(`Author: ${pr.user.login}, Association: ${authorAssociation}, Is External: ${isExternal}`);
+            console.log(`Current PR Labels: ${prLabels.join(', ')}`);
+
+            // Logic for 'unlabeled' event: only re-add if *our* label was removed and author is still external
+            if (context.eventName === 'pull_request_target' && context.payload.action === 'unlabeled') {
+              const removedLabel = context.payload.label.name;
+              console.log(`Label removed: ${removedLabel}`);
+              if (removedLabel === externalLabel && isExternal) {
+                console.log(`External label was removed, author is still external. Re-adding label: ${externalLabel}`);
+                await github.rest.issues.addLabels({
+                  owner: context.repo.owner,
+                  repo: context.repo.repo,
+                  issue_number: pr.number,
+                  labels: [externalLabel]
+                });
+                console.log(`Label "${externalLabel}" re-added successfully.`);
+              } else {
+                console.log(`Removed label was not the external label or author is not external. No action needed for unlabeled event.`);
+              }
+            }
+            // Logic for 'opened' or 'reopened' events: add label if external and not already present
+            else if (['opened', 'reopened'].includes(context.payload.action)) {
+              if (isExternal && !hasExternalLabel) {
+                console.log(`Author association "${authorAssociation}" is external and label is missing. Adding label: ${externalLabel}`);
+                await github.rest.issues.addLabels({
+                  owner: context.repo.owner,
+                  repo: context.repo.repo,
+                  issue_number: pr.number,
+                  labels: [externalLabel]
+                });
+                console.log(`Label "${externalLabel}" added successfully.`);
+              } else if (isExternal && hasExternalLabel) {
+                 console.log(`Author is external, but label "${externalLabel}" is already present.`);
+              } else {
+                console.log(`Author association "${authorAssociation}" is internal or label already present. No label added.`);
+              }
+            }
+            // Optional: Add logic for 'synchronize' if you uncomment it in the 'on:' section
+            // else if (context.payload.action === 'synchronize') { ... }
+            else {
+              console.log(`Unhandled action type: ${context.payload.action}. No labeling action taken.`);
+            }