1 files changed, 34 insertions, 0 deletions
diff --git a/src/libstore/realisation.hh b/src/libstore/realisation.hh
new file mode 100644
index 000000000..c573e1bb4
--- /dev/null
+++ b/src/libstore/realisation.hh
@@ -0,0 +1,34 @@
+#pragma once
+
+#include "path.hh"
+
+namespace nix {
+
+struct DrvOutput {
+    StorePath drvPath;
+    std::string outputName;
+
+    std::string to_string() const;
+
+    static DrvOutput parse(const std::string &);
+
+    bool operator<(const DrvOutput& other) const { return to_pair() < other.to_pair(); }
+    bool operator==(const DrvOutput& other) const { return to_pair() == other.to_pair(); }
+
+private:
+    // Just to make comparison operators easier to write
+    std::pair<StorePath, std::string> to_pair() const
+    { return std::make_pair(drvPath, outputName); }
+};
+
+struct Realisation {
+    DrvOutput id;
+    StorePath outPath;
+
+    std::string to_string() const;
+    static Realisation parse(const std::string & s, const std::string & whence);
+};
+
+typedef std::map<DrvOutput, Realisation> DrvOutputs;
+
+}