write PR body to file, read back in later

Author: TimHess

.github/workflows/build-and-stage.yml

@@ -35,16 +35,16 @@ jobs:
 
     - name: Detect template source from PR body
       run: |
-        PullRequestBody=$(cat <<'EOF'
+        cat << EOF > /tmp/pull_request_body.txt
         ${{ github.event.pull_request.body }}
         EOF
-        )
-        CheckoutTarget=$(grep "template_checkout_target=" $PullRequestBody | awk '{print $2}')
-        if [[ $CheckoutTarget ]]; then
+
+        CheckoutTarget=$(grep "template_checkout_target=" /tmp/pull_request_body.txt | awk -F= '{print $2}')
+        if [ "$CheckoutTarget" = "" ]; then
+            echo "Did not find a checkout target for templates."
+        else
             echo "Found checkout target '$CheckoutTarget' in PR body, using include templates from source."
             echo "{TEMPLATE_CHECKOUT_TARGET}=$CheckoutTarget" >> "$GITHUB_ENV"
-        else
-            echo "Did not find a checkout target for templates."
         fi
 
     # - name: Login to Azure