2 files changed, 12 insertions, 4 deletions
diff --git a/src/libutil/hash.cc b/src/libutil/hash.cc
index 76fa67086..35054462c 100644
--- a/src/libutil/hash.cc
+++ b/src/libutil/hash.cc
@@ -136,7 +136,7 @@ Hash Hash::parseSRI(std::string_view original) {
     auto rest = original;
 
     // Parse the has type before the separater, if there was one.
-    auto hashRaw = splitPrefix(rest, '-');
+    auto hashRaw = splitPrefixTo(rest, '-');
     if (!hashRaw)
         throw BadHash("hash '%s' is not SRI", original);
     HashType parsedType = parseHashType(*hashRaw);
@@ -151,10 +151,10 @@ static std::pair<std::optional<HashType>, bool> getParsedTypeAndSRI(std::string_
     // Parse the has type before the separater, if there was one.
     std::optional<HashType> optParsedType;
     {
-        auto hashRaw = splitPrefix(rest, ':');
+        auto hashRaw = splitPrefixTo(rest, ':');
 
         if (!hashRaw) {
-            hashRaw = splitPrefix(rest, '-');
+            hashRaw = splitPrefixTo(rest, '-');
             if (hashRaw)
                 isSRI = true;
         }
diff --git a/src/libutil/parser.hh b/src/libutil/parser.hh
index a6a83ce89..d19d7d8ed 100644
--- a/src/libutil/parser.hh
+++ b/src/libutil/parser.hh
@@ -3,13 +3,15 @@
 #include <optional>
 #include <string_view>
 
+#include "util.hh"
+
 namespace nix {
 
 // If `separator` is found, we return the portion of the string before the
 // separator, and modify the string argument to contain only the part after the
 // separator. Otherwise, wer return `std::nullopt`, and we leave the argument
 // string alone.
-static inline std::optional<std::string_view> splitPrefix(std::string_view & string, char separator) {
+static inline std::optional<std::string_view> splitPrefixTo(std::string_view & string, char separator) {
     auto sepInstance = string.find(separator);
 
     if (sepInstance != std::string_view::npos) {
@@ -21,5 +23,11 @@ static inline std::optional<std::string_view> splitPrefix(std::string_view & str
     return std::nullopt;
 }
 
+static inline bool splitPrefix(std::string_view & string, std::string_view prefix) {
+    bool res = hasPrefix(string, prefix);
+    if (res)
+        string.remove_prefix(prefix.length());
+    return res;
+}
 
 }