fix(cicd): keep branch follower debug JSON parseable

scripts/native/cicd/controller-one-shot.sh

@@ -3,8 +3,6 @@ set -eu
 
 cd /work
 rm -rf /work/unidesk
-started_at=$(date -Iseconds)
-echo "branch-follower one-shot started ${started_at}" >&2
 
 /etc/unidesk-cicd-branch-follower/sync-source.sh \
   "${UNIDESK_CONTROLLER_SOURCE_REPOSITORY}" \
@@ -16,6 +14,34 @@ git clone --branch "${UNIDESK_CONTROLLER_SOURCE_BRANCH}" "/cache/${UNIDESK_CONTR
 cp /etc/unidesk-cicd-branch-follower/cicd-branch-followers.yaml /work/unidesk/config/cicd-branch-followers.yaml
 cd /work/unidesk
 
-"$@"
+machine_output=false
+for arg in "$@"; do
+  case "$arg" in
+    --json|--raw|json)
+      machine_output=true
+      ;;
+  esac
+done
 
-echo "branch-follower one-shot finished $(date -Iseconds)" >&2
+if [ "${machine_output}" = true ]; then
+  output_file=$(mktemp)
+  if "$@" >"${output_file}"; then
+    node - "${output_file}" <<'NODE'
+const { readFileSync } = require("node:fs");
+const path = process.argv[2];
+const text = readFileSync(path, "utf8").trim();
+if (text.length === 0) process.exit(0);
+try {
+  process.stdout.write(JSON.stringify(JSON.parse(text)));
+} catch {
+  process.stdout.write(text);
+}
+NODE
+  else
+    status=$?
+    cat "${output_file}"
+    exit "${status}"
+  fi
+else
+  "$@"
+fi