Read the existing Sample main build output once

Author: rmcdaniel

.github/workflows/sample-build-readback.yml

@@ -0,0 +1,30 @@
+name: Temporary Sample build readback
+
+on:
+  workflow_dispatch:
+
+permissions:
+  actions: read
+
+jobs:
+  readback:
+    runs-on: ubuntu-latest
+    timeout-minutes: 3
+    steps:
+      - name: Read the existing main build log
+        env:
+          GH_TOKEN: ${{ github.token }}
+        shell: bash
+        run: |
+          set -euo pipefail
+          log_file="$RUNNER_TEMP/sample-build-117620081555.log"
+          trap 'rm -- "$log_file"' EXIT
+          timeout 60s gh api repos/durable-workflow/sample-app/actions/jobs/117620081555/logs > "$log_file"
+          echo 'Last 35 lines of existing main job 117620081555:'
+          tail -n 35 "$log_file"
+          while IFS= read -r line; do
+            line="${line//'%'/'%25'}"
+            line="${line//$'\r'/'%0D'}"
+            line="${line//$'\n'/'%0A'}"
+            printf '::notice title=Sample build last output::%s\n' "$line"
+          done < <(tail -n 12 "$log_file")