Fix `addTextToStore` for binary caches

Because of a too eager refactoring, `addTextToStore` used to throw an
error because the input wasn't a valid nar.

Partially revert that refactoring to wrap the text into a proper nar
(using `dumpString`) to make this method work again

1 files changed, 3 insertions, 1 deletions

diff --git a/src/libstore/binary-cache-store.cc b/src/libstore/binary-cache-store.cc
index 5b081c1ae..94c11355f 100644
--- a/src/libstore/binary-cache-store.cc
+++ b/src/libstore/binary-cache-store.cc
@@ -433,7 +433,9 @@ StorePath BinaryCacheStore::addTextToStore(const string & name, const string & s
     if (!repair && isValidPath(path))
         return path;
 
-    auto source = StringSource { s };
+    StringSink sink;
+    dumpString(s, sink);
+    auto source = StringSource { *sink.s };
     return addToStoreCommon(source, repair, CheckSigs, [&](HashResult nar) {
         ValidPathInfo info { path, nar.first };
         info.narSize = nar.second;