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libexpr: add findDerivationFilename

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extract the derivation to filename:lineno heuristic
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zimbatm 2019-10-23 17:21:10 +02:00
parent 207a537343
commit 59c7249769
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4 changed files with 36 additions and 43 deletions
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5
src/libexpr/attr-path.hh
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@ -4,10 +4,15 @@
#include <string>
#include <map>
#include <tuple>
namespace nix {
Value * findAlongAttrPath(EvalState & state, const string & attrPath,
Bindings & autoArgs, Value & vIn);
/* Heuristic to find the filename and lineno or a derivation. */
std::tuple<std::string, int> findDerivationFilename(EvalState & state,
Value & v, std::string what);
}