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#include "downstream-placeholder.hh"
#include "derivations.hh"
namespace nix {
std::string DownstreamPlaceholder::render() const
{
return "/" + hash.to_string(Base32, false);
}
DownstreamPlaceholder DownstreamPlaceholder::unknownCaOutput(
const StorePath & drvPath,
std::string_view outputName,
const ExperimentalFeatureSettings & xpSettings)
{
xpSettings.require(Xp::CaDerivations);
auto drvNameWithExtension = drvPath.name();
auto drvName = drvNameWithExtension.substr(0, drvNameWithExtension.size() - 4);
auto clearText = "nix-upstream-output:" + std::string { drvPath.hashPart() } + ":" + outputPathName(drvName, outputName);
return DownstreamPlaceholder {
hashString(htSHA256, clearText)
};
}
DownstreamPlaceholder DownstreamPlaceholder::unknownDerivation(
const DownstreamPlaceholder & placeholder,
std::string_view outputName,
const ExperimentalFeatureSettings & xpSettings)
{
xpSettings.require(Xp::DynamicDerivations);
auto compressed = compressHash(placeholder.hash, 20);
auto clearText = "nix-computed-output:"
+ compressed.to_string(Base32, false)
+ ":" + std::string { outputName };
return DownstreamPlaceholder {
hashString(htSHA256, clearText)
};
}
DownstreamPlaceholder DownstreamPlaceholder::fromSingleDerivedPathBuilt(
const SingleDerivedPath::Built & b)
{
return std::visit(overloaded {
[&](const SingleDerivedPath::Opaque & o) {
return DownstreamPlaceholder::unknownCaOutput(o.path, b.output);
},
[&](const SingleDerivedPath::Built & b2) {
return DownstreamPlaceholder::unknownDerivation(
DownstreamPlaceholder::fromSingleDerivedPathBuilt(b2),
b.output);
},
}, b.drvPath->raw());
}
}
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