CI - Add mainline labels automatically

Signed-off-by: Justin Williams <Justin.Williams@amd.com>


[ROCm/amdsmi commit: 369afa85eb]

projects/amdsmi/.github/workflows/label_mainline.yml

@@ -0,0 +1,46 @@
+name: Auto Label Mainline PRs
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened, closed]
+
+jobs:
+  add-label:
+    runs-on: ubuntu-latest
+    container:
+      image: node:16-alpine
+    permissions:
+      pull-requests: write
+    steps:
+      - name: Add label to PRs targeting amd-mainline
+        uses: actions/github-script@v6
+        with:
+          script: |
+            const pr = context.payload.pull_request;
+            const baseBranch = pr.base.ref;
+
+            // Debug information
+            console.log(`Base Branch: ${baseBranch}`);
+
+            // Check if PR is targeting amd-mainline branch
+            const isMainlineTarget = baseBranch === 'amd-mainline';
+
+            if (isMainlineTarget) {
+              // Label to apply
+              const labelToAdd = 'Merge amd-mainline';
+
+              // Try to add the label
+              try {
+                await github.rest.issues.addLabels({
+                  owner: context.repo.owner,
+                  repo: context.repo.repo,
+                  issue_number: pr.number,
+                  labels: [labelToAdd]
+                });
+                console.log(`Added label "${labelToAdd}" to PR #${pr.number}`);
+              } catch (error) {
+                console.error(`Error adding label: ${error.message}`);
+              }
+            } else {
+              console.log('PR does not match criteria for automatic labeling');
+            }