add review-commit-action to wait for approvals on PRT events

.github/workflows/yocto-build-deploy.yml

@@ -208,35 +208,18 @@ jobs:
         shell: bash --noprofile --norc -eo pipefail -x {0}
 
     steps:
-      # https://github.com/product-os/flowzone/blob/d92a0f707ca791ea4432306fcb35008848cc9bcb/flowzone.yml#L449-L473
-      - name: Reject unapproved external contributions
-        env:
-          ok_to_test_label: ok-to-test
-          # https://cli.github.com/manual/gh_help_environment
-          GH_DEBUG: "true"
-          GH_PAGER: "cat"
-          GH_PROMPT_DISABLED: "true"
-          GH_REPO: "${{ inputs.device-repo }}"
-          GH_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
-        if: |
-          github.event.pull_request.state == 'open' &&
-          github.event.pull_request.head.repo.full_name != github.repository
-        run: |
-
-          pr_labels="$(gh pr view ${{ github.event.pull_request.number }} --json labels -q .labels[].name)"
-
-          for label in ${pr_labels}
-          do
-            if [[ "$label" =~ "${{ env.ok_to_test_label }}" ]]
-            then
-              gh pr edit ${{ github.event.pull_request.number }} --remove-label "${{ env.ok_to_test_label }}"
-              exit 0
-            fi
-          done
-
-          echo "::error::External contributions must be approved with the label '${{ env.ok_to_test_label }}'. \
-            Please contact a member of the organization for assistance."
-          exit 1
+      # Combining pull_request_target workflow trigger with an explicit checkout of an
+      # untrusted PR is a dangerous practice that may lead to repository compromise.
+      # https://securitylab.github.com/resources/github-actions-preventing-pwn-requests/
+      # This action requires approvals via reactions for each workflow run.
+      # https://github.com/product-os/review-commit-action
+      - name: Wait for approval on pull_request_target events
+        if: github.event_name == 'pull_request_target' && github.event.pull_request.merged != true
+        timeout-minutes: 90
+        uses: product-os/[email protected]
+        with:
+          poll-interval: '10'
+          allow-authors: false
 
       # this must be done before putting files in the workspace
       # https://github.com/easimon/maximize-build-space