1 files changed, 32 insertions, 0 deletions
diff --git a/third_party/nix/src/libexpr/names.hh b/third_party/nix/src/libexpr/names.hh
new file mode 100644
index 000000000000..13c3093e77b0
--- /dev/null
+++ b/third_party/nix/src/libexpr/names.hh
@@ -0,0 +1,32 @@
+#pragma once
+
+#include <memory>
+
+#include "types.hh"
+#include <regex>
+
+namespace nix {
+
+struct DrvName
+{
+    string fullName;
+    string name;
+    string version;
+    unsigned int hits;
+
+    DrvName();
+    DrvName(const string & s);
+    bool matches(DrvName & n);
+
+private:
+    std::unique_ptr<std::regex> regex;
+};
+
+typedef list<DrvName> DrvNames;
+
+string nextComponent(string::const_iterator & p,
+    const string::const_iterator end);
+int compareVersions(const string & v1, const string & v2);
+DrvNames drvNamesFromArgs(const Strings & opArgs);
+
+}