1 files changed, 31 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..e2ddb5cb993e
--- /dev/null
+++ b/third_party/nix/src/libexpr/names.hh
@@ -0,0 +1,31 @@
+#pragma once
+
+#include <memory>
+#include <regex>
+
+#include "types.hh"
+
+namespace nix {
+
+struct DrvName {
+  std::string fullName;
+  std::string name;
+  std::string version;
+  unsigned int hits;
+
+  DrvName();
+  DrvName(const std::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 std::string& v1, const std::string& v2);
+DrvNames drvNamesFromArgs(const Strings& opArgs);
+
+}  // namespace nix