Deduplicate string literal rendering, fix 4909

1 files changed, 9 insertions, 0 deletions

diff --git a/src/libstore/derivations.cc b/src/libstore/derivations.cc
index abdfb1978..9948862e5 100644
--- a/src/libstore/derivations.cc
+++ b/src/libstore/derivations.cc
@@ -313,6 +313,15 @@ Derivation parseDerivation(const Store & store, std::string && s, std::string_vi
 }
 
 
+/**
+ * Print a derivation string literal to an std::string.
+ *
+ * This syntax does not generalize to the expression language, which needs to
+ * escape `$`.
+ *
+ * @param res Where to print to
+ * @param s Which logical string to print
+ */
 static void printString(std::string & res, std::string_view s)
 {
     boost::container::small_vector<char, 64 * 1024> buffer;