* More remote operations.

* Added new operation hasSubstitutes(), which is more efficient than
  querySubstitutes().size() > 0.

1 files changed, 5 insertions, 2 deletions

diff --git a/src/libstore/store-api.hh b/src/libstore/store-api.hh
index abf27a346f31..31e8152e86bd 100644
--- a/src/libstore/store-api.hh
+++ b/src/libstore/store-api.hh
@@ -43,7 +43,11 @@ public:
     virtual bool isValidPath(const Path & path) = 0;
 
     /* Return the substitutes for the given path. */
-    virtual Substitutes querySubstitutes(const Path & srcPath) = 0;
+    virtual Substitutes querySubstitutes(const Path & path) = 0;
+
+    /* More efficient variant if we just want to know if a path has
+       substitutes. */
+    virtual bool hasSubstitutes(const Path & path);
 
     /* Queries the hash of a valid path. */ 
     virtual Hash queryPathHash(const Path & path) = 0;
@@ -121,7 +125,6 @@ extern boost::shared_ptr<StoreAPI> store;
 boost::shared_ptr<StoreAPI> openStore(bool reserveSpace = true);
 
 
-
 }