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builtin:fetchurl: Get output hash info from the drv

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This commit is contained in:
Eelco Dolstra 2024-02-01 22:01:02 +01:00
parent 1ee42c5b88
commit b8b739e484
1 changed files with 8 additions and 5 deletions
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13
src/libstore/builtins/fetchurl.cc
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@ -16,7 +16,12 @@ void builtinFetchurl(const BasicDerivation & drv, const std::string & netrcData)
writeFile(settings.netrcFile, netrcData, 0600);
}
if (!drv.type().isFixed())
auto out = get(drv.outputs, "out");
if (!out)
throw Error("'builtin:fetchurl' requires an 'out' output");
auto dof = std::get_if<DerivationOutput::CAFixed>(&out->raw);
if (!dof)
throw Error("'builtin:fetchurl' must be a fixed-output derivation");
auto getAttr = [&](const std::string & name) {
@ -62,13 +67,11 @@ void builtinFetchurl(const BasicDerivation & drv, const std::string & netrcData)
};
/* Try the hashed mirrors first. */
if (getAttr("outputHashMode") == "flat")
if (dof->ca.method.getFileIngestionMethod() == FileIngestionMethod::Flat)
for (auto hashedMirror : settings.hashedMirrors.get())
try {
if (!hasSuffix(hashedMirror, "/")) hashedMirror += '/';
std::optional<HashAlgorithm> ht = parseHashAlgoOpt(getAttr("outputHashAlgo"));
Hash h = newHashAllowEmpty(getAttr("outputHash"), ht);
fetch(hashedMirror + printHashAlgo(h.algo) + "/" + h.to_string(HashFormat::Base16, false));
fetch(hashedMirror + printHashAlgo(dof->ca.hash.algo) + "/" + dof->ca.hash.to_string(HashFormat::Base16, false));
return;
} catch (Error & e) {
debug(e.what());