determine special case by existence of cargo-checksum.json

.github/scripts/ext-debian.sh

@@ -47,12 +47,13 @@ stage_source() {
 
   # Special case for creating source tarball of a Rust package vendored dependencies to allow packages with unpackage deps in debian
   # See https://blog.shadura.me/2020/12/22/vendoring-rust-in-debian-derivative/
-  if grep -q "cargo_registry" debian/rules ; then # Assume that any reference to 'cargo_registry' in rules implies needing to generate vendored deps
+  if [ -f debian/cargo-checksum.json ]; then # Assume cargo-checksum.json existing implies needing to generate vendored deps
     echo -e "\033[0;34mGenerating vendor source tarball from cargo\033[0m"
     [ -d vendor ] && rm -rf vendor
     rm -rf Cargo.lock || true
     cargo vendor
     tar Jcf ../${debian_package_name}_${debian_version}.orig-vendor.tar.xz vendor/
+    rm -Rf vendor
   fi
 
   cd "$PKG_BUILD_PATH" || exit