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Merge pull request #3729 from obsidiansystems/simpler-hased-mirror

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hashed-mirrors: Use parsed derivation output rather than reconstructing it
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Eelco Dolstra 2020-06-29 14:04:12 +02:00 committed by GitHub
commit 58bc3b6578
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1 changed files with 6 additions and 3 deletions
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9
src/libstore/builtins/fetchurl.cc
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@ -58,13 +58,16 @@ void builtinFetchurl(const BasicDerivation & drv, const std::string & netrcData)
}
};
/* We always have one output, and if it's a fixed-output derivation (as
checked below) it must be the only output */
auto & output = drv.outputs.begin()->second;
/* Try the hashed mirrors first. */
if (getAttr("outputHashMode") == "flat")
if (output.hash && output.hash->method == FileIngestionMethod::Flat)
for (auto hashedMirror : settings.hashedMirrors.get())
try {
if (!hasSuffix(hashedMirror, "/")) hashedMirror += '/';
auto ht = parseHashTypeOpt(getAttr("outputHashAlgo"));
auto h = Hash(getAttr("outputHash"), ht);
auto & h = output.hash->hash;
fetch(hashedMirror + printHashType(*h.type) + "/" + h.to_string(Base16, false));
return;
} catch (Error & e) {