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authorEelco Dolstra <eelco.dolstra@logicblox.com>2013-09-03T13·45+0200
committerEelco Dolstra <eelco.dolstra@logicblox.com>2013-09-03T13·45+0200
commit07a08bddf001271b4b7eff2a119c395f40119966 (patch)
tree304d714281d8b3021495903ef004763a8dc280bc /src/libexpr
parentc57ed84e286047a9f3c103cf689ae04381c23dad (diff)
nix-env: Load files in ~/.nix-defexpr on demand
So if you do "nix-env -qa -A nixos", then other channels won't be
parsed/evaluated at all.
Diffstat (limited to 'src/libexpr')
-rw-r--r--src/libexpr/eval.cc6
-rw-r--r--src/libexpr/eval.hh6
2 files changed, 12 insertions, 0 deletions
diff --git a/src/libexpr/eval.cc b/src/libexpr/eval.cc
index 50f36ce4e90b..af2bf92e3fe9 100644
--- a/src/libexpr/eval.cc
+++ b/src/libexpr/eval.cc
@@ -222,6 +222,12 @@ void EvalState::addPrimOp(const string & name,
 }
 
 
+void EvalState::getBuiltin(const string & name, Value & v)
+{
+    v = *baseEnv.values[0]->attrs->find(symbols.create(name))->value;
+}
+
+
 /* Every "format" object (even temporary) takes up a few hundred bytes
    of stack space, which is a real killer in the recursive
    evaluator.  So here are some helper functions for throwing
diff --git a/src/libexpr/eval.hh b/src/libexpr/eval.hh
index 29c8341dfb9a..b08bec8d9eb9 100644
--- a/src/libexpr/eval.hh
+++ b/src/libexpr/eval.hh
@@ -203,6 +203,12 @@ private:
     void addPrimOp(const string & name,
         unsigned int arity, PrimOpFun primOp);
 
+public:
+
+    void getBuiltin(const string & name, Value & v);
+
+private:
+
     inline Value * lookupVar(Env * env, const VarRef & var, bool noEval);
 
     friend class ExprVar;