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Move substitution into Input::fetch()

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Closes #3520.
This commit is contained in:
Eelco Dolstra 2020-05-30 01:16:53 +02:00
parent 0e7f77a59a
commit 89e0b3e2d6
3 changed files with 20 additions and 55 deletions
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25
src/libexpr/primops/fetchTree.cc
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@ -88,31 +88,6 @@ static void prim_fetchTree(EvalState & state, const Pos & pos, Value * * args, V
if (evalSettings.pureEval && !input.isImmutable())
throw Error("in pure evaluation mode, 'fetchTree' requires an immutable input, at %s", pos);
/* The tree may already be in the Nix store, or it could be
substituted (which is often faster than fetching from the
original source). So check that. */
if (input.hasAllInfo()) {
auto storePath = input.computeStorePath(*state.store);
try {
state.store->ensurePath(storePath);
debug("using substituted/cached input '%s' in '%s'",
input.to_string(), state.store->printStorePath(storePath));
auto actualPath = state.store->toRealPath(storePath);
if (state.allowedPaths)
state.allowedPaths->insert(actualPath);
emitTreeAttrs(state, fetchers::Tree { .actualPath = actualPath, .storePath = std::move(storePath) }, input, v);
return;
} catch (Error & e) {
debug("substitution of input '%s' failed: %s", input.to_string(), e.what());
}
}
auto [tree, input2] = input.fetch(state.store);
if (state.allowedPaths)