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Allow derivations-as-srcs in the context of builtins.toFile files

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Shea Levy 2015-07-23 09:34:06 -04:00 committed by Eelco Dolstra
parent 61af14a921
commit 1ed55234d9
1 changed files with 6 additions and 2 deletions
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6
src/libexpr/primops.cc
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@ -872,8 +872,12 @@ static void prim_toFile(EvalState & state, const Pos & pos, Value * * args, Valu
for (auto path : context) {
if (path.at(0) == '=') path = string(path, 1);
if (isDerivation(path))
if (isDerivation(path)) {
/* See prim_unsafeDiscardOutputDependency. */
if (path.at(0) != '~')
throw EvalError(format("in ‘toFile’: the file ‘%1%’ cannot refer to derivation outputs, at %2%") % name % pos);
path = string(path, 1);
}
refs.insert(path);
}