Try to auto-generate BPF objects on PR

Author: mariomac

.github/workflows/generate_bpf_objects.yml

@@ -0,0 +1,57 @@
+name: Auto-generate and commit BPF files
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+permissions:
+  contents: write  # Required for creating PRs
+
+jobs:
+  generate-and-commit:
+    runs-on: ubuntu-latest
+    
+    steps:
+      - name: "Checkout repo"
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+        with:
+          persist-credentials: false
+
+      - name: Run docker-generate
+        run: make docker-generate
+
+      - name: Add generated files
+        run: |
+          find . -name "*_bpfel*" -not -path "**/vendor/*" | xargs git add -f
+
+      - name: "Create/update PR"
+        id: git-check
+        env:
+          GITHUB_TOKEN: ${secrets.GITHUB_TOKEN}
+        run: |
+          if git diff --staged --quiet; then
+            echo "No changes to commit"
+            echo "changes=true" >> $GITHUB_OUTPUT
+          else
+            echo "Changes detected"
+            echo "changes=false" >> $GITHUB_OUTPUT
+          fi
+
+      - uses: actions/create-github-app-token@d72941d797fd3113feb6b93fd0dec494b13a2547 # v1.12.0
+        id: generate-token
+        if: steps.git-check.outputs.changes == 'true'
+        with:
+          app-id: ${{ vars.OTELBOT_APP_ID }}
+          private-key: ${{ secrets.OTELBOT_PRIVATE_KEY }}
+      - name: "Create/update PR"
+        if: steps.git-check.outputs.changes == 'true'
+        env:
+          # not using secrets.GITHUB_TOKEN since pull requests from that token do not run workflows
+          GH_TOKEN: ${{ steps.generate-token.outputs.token }}
+        run: |
+          git config user.name otelbot
+          git config user.email [email protected]
+
+          git commit -m "Auto-generate BPF files"
+          branch="${GITHUB_HEAD_REF}"
+          git push origin HEAD:$branch