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-rw-r--r--src/libstore/store-api.hh4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/libstore/store-api.hh b/src/libstore/store-api.hh
index 8531eb040..01b561e9d 100644
--- a/src/libstore/store-api.hh
+++ b/src/libstore/store-api.hh
@@ -77,6 +77,10 @@ public:
virtual void queryReferrers(const Path & path,
PathSet & referrers) = 0;
+ /* Query the deriver of a store path. Return the empty string if
+ no deriver has been set. */
+ virtual Path queryDeriver(const Path & path) = 0;
+
/* Copy the contents of a path to the store and register the
validity the resulting path. The resulting path is returned.
If `fixed' is true, then the output of a fixed-output