fix up for shellcheck

sync/minor-release-sync-to-staging.sh

@@ -59,20 +59,17 @@ for ARCH in "${ARCHES[@]}"; do
     # Copy the ISO and manifests into the main isos target
     cp "${SOURCE}"/*.iso "${TARGET}/"
     cp "${SOURCE}"/*.iso.manifest "${TARGET}/"
-  done
-done
-
-# call out for checksum creation on the ISOs
-pushd "${STAGING_ROOT}/${CATEGORY_STUB}/${REV}" || { echo "Failed to change directory"; exit; }
-for file in isos/**/*iso*; do
-  arch=$(echo $file | cut -d\/ -f 2);
+    pushd "${TARGET}" || exit
+    # shellcheck disable=SC2086
+    for file in *.iso; do
       printf "# %s: %s bytes\n%s\n" \
-    "$(basename $file)" \
-    "$(stat -c %s $file)" \
-    "$(cd isos/${arch}/ && sha256sum --tag $(basename $file))" \
-  | sudo tee -a isos/${arch}/CHECKSUM;
+        "${file}" \
+        "$(stat -c %s ${file})" \
+        "$(sha256sum --tag ${file})" \
+      | sudo tee -a CHECKSUM;
+    done
+  done
 done
-popd || { echo "Failed to change directory"; exit; }
 
 # make a kickstart directory
 for ARCH in "${ARCHES[@]}"; do