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Check the flake epoch

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Closes #2883.
This commit is contained in:
Eelco Dolstra 2019-05-22 14:31:40 +02:00
parent 3cecf3f39c
commit e414bde6f9
4 changed files with 18 additions and 4 deletions
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11
src/libexpr/primops/flake.cc
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@ -309,10 +309,17 @@ Flake getFlake(EvalState & state, const FlakeRef & flakeRef, bool impureIsAllowe
state.forceAttrs(vInfo);
if (auto epoch = vInfo.attrs->get(state.symbols.create("epoch"))) {
flake.epoch = state.forceInt(*(**epoch).value, *(**epoch).pos);
if (flake.epoch > 2019)
throw Error("flake '%s' requires unsupported epoch %d; please upgrade Nix", flakeRef, flake.epoch);
} else
throw Error("flake '%s' lacks attribute 'epoch'", flakeRef);
if (auto name = vInfo.attrs->get(state.sName))
flake.id = state.forceStringNoCtx(*(**name).value, *(**name).pos);
else
throw Error("flake lacks attribute 'name'");
throw Error("flake '%s' lacks attribute 'name'", flakeRef);
if (auto description = vInfo.attrs->get(state.sDescription))
flake.description = state.forceStringNoCtx(*(**description).value, *(**description).pos);
@ -337,7 +344,7 @@ Flake getFlake(EvalState & state, const FlakeRef & flakeRef, bool impureIsAllowe
state.forceFunction(*(**provides).value, *(**provides).pos);
flake.vProvides = (**provides).value;
} else
throw Error("flake lacks attribute 'provides'");
throw Error("flake '%s' lacks attribute 'provides'", flakeRef);
return flake;
}