forked from lix-project/lix
don't read outputs into memory for output rewriting
RewritingSink can handle being fed input where a reference crosses a chunk boundary. we don't need to load the whole source into memory, and in fact *not* loading the whole source lets nix build FODs that do not fit into memory (eg fetchurl'ing data files larger than system memory).
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@ -2374,10 +2374,8 @@ DrvOutputs LocalDerivationGoal::registerOutputs()
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if (*scratchPath != finalPath) {
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// Also rewrite the output path
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auto source = sinkToSource([&](Sink & nextSink) {
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StringSink sink;
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dumpPath(actualPath, sink);
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RewritingSink rsink2(oldHashPart, std::string(finalPath.hashPart()), nextSink);
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rsink2(sink.s);
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dumpPath(actualPath, rsink2);
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rsink2.flush();
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});
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Path tmpPath = actualPath + ".tmp";
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