Bit more verbose output from the switchboard task

Makes it easier to debug eventual issues and makes it easier to fine
tune expressions.

.tekton/tasks/task-switchboard.yaml

@@ -46,10 +46,15 @@ spec:
 
         ec opa check --v1-compatible "${rules}"
 
-        pr_number=$(gh search prs --repo konflux-ci/build-definitions "$(params.revision)" --json number --jq '.[].number')
+        pr_number="$(gh search prs --repo konflux-ci/build-definitions "$(params.revision)" --json number --jq '.[].number')"
 
-        ec opa eval --v1-compatible --data "${rules}" --input \
-        <(gh pr view "https://github.com/konflux-ci/build-definitions/pull/${pr_number}" --json files --jq '[.files.[].path']) \
+        echo "Determined pull request number ${pr_number}"
+
+        changed="$(gh pr view "https://github.com/konflux-ci/build-definitions/pull/${pr_number}" --json files --jq '[.files.[].path'])"
+        echo Changed files:
+        echo "${changed}" | jq -r '.[]'
+
+        echo "${changed}" | ec opa eval --v1-compatible --data "${rules}" --stdin-input \
         'data[_]' \
         | jq '[.result.[].expressions.[].value | to_entries | .[] | select(.value == true) | .key]' \
         | tee "$(results.bindings.path)"