mirror of
https://github.com/privatevoid-net/nix-super.git
synced 2024-11-16 03:06:17 +02:00
a9b69b2fff
Similar to 1ee42c5b88, get the "out"
path from the derivation (and complain if it doesn't exist), rather
than getting it from the environment.
30 lines
763 B
C++
30 lines
763 B
C++
#include "builtins.hh"
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#include "tarfile.hh"
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namespace nix {
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void builtinUnpackChannel(
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const BasicDerivation & drv,
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const std::map<std::string, Path> & outputs)
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{
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auto getAttr = [&](const std::string & name) {
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auto i = drv.env.find(name);
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if (i == drv.env.end()) throw Error("attribute '%s' missing", name);
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return i->second;
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};
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auto out = outputs.at("out");
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auto channelName = getAttr("channelName");
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auto src = getAttr("src");
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createDirs(out);
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unpackTarfile(src, out);
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auto entries = readDirectory(out);
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if (entries.size() != 1)
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throw Error("channel tarball '%s' contains more than one file", src);
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renameFile((out + "/" + entries[0].name), (out + "/" + channelName));
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}
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}
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