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authorEelco Dolstra <edolstra@gmail.com>2017-07-20T11·32+0200
committerEelco Dolstra <edolstra@gmail.com>2017-07-20T11·50+0200
commitc94f3d5575d7af5403274d1e9e2f3c9d72989751 (patch)
treed6a302d585ed8f38a8a8d959b74bee44b7d77370 /src/libexpr/get-drvs.hh
parent57a30e101b36a064f09619bf4a3f0b8a3fdcdcad (diff)
nix-shell: Use bashInteractive from <nixpkgs>
This adds about 0.1s to nix-shell runtime in the case where
bashInteractive already exists.

See discussion at https://github.com/NixOS/nixpkgs/issues/27493.
Diffstat (limited to 'src/libexpr/get-drvs.hh')
-rw-r--r--src/libexpr/get-drvs.hh8
1 files changed, 4 insertions, 4 deletions
diff --git a/src/libexpr/get-drvs.hh b/src/libexpr/get-drvs.hh
index 82fb8a3ac6a8..32294e458751 100644
--- a/src/libexpr/get-drvs.hh
+++ b/src/libexpr/get-drvs.hh
@@ -75,10 +75,10 @@ typedef list<DrvInfo> DrvInfos;
 #endif
 
 
-/* If value `v' denotes a derivation, store information about the
-   derivation in `drv' and return true.  Otherwise, return false. */
-bool getDerivation(EvalState & state, Value & v, DrvInfo & drv,
-    bool ignoreAssertionFailures);
+/* If value `v' denotes a derivation, return a DrvInfo object
+   describing it. Otherwise return nothing. */
+std::experimental::optional<DrvInfo> getDerivation(EvalState & state,
+    Value & v, bool ignoreAssertionFailures);
 
 void getDerivations(EvalState & state, Value & v, const string & pathPrefix,
     Bindings & autoArgs, DrvInfos & drvs,