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Work on Values instead of Exprs

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This prevents some duplicate evaluation in nix-env and
nix-instantiate.

Also, when traversing ~/.nix-defexpr, only read regular files with the
extension .nix.  Previously it was reading files like
.../channels/binary-caches/<name>.  The only reason this didn't cause
problems is pure luck (namely, <name> shadows an actual Nix
expression, the binary-caches files happen to be syntactically valid
Nix expressions, and we iterate over the directory contents in just
the right order).
This commit is contained in:
Eelco Dolstra 2013-09-03 13:17:51 +00:00
parent 06bb2d95b4
commit ef4f5ba85e
4 changed files with 62 additions and 50 deletions
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4
src/libexpr/attr-path.hh
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@ -7,7 +7,7 @@
namespace nix {
void findAlongAttrPath(EvalState & state, const string & attrPath,
Bindings & autoArgs, Expr * e, Value & v);
Value * findAlongAttrPath(EvalState & state, const string & attrPath,
Bindings & autoArgs, Value & vIn);
}