40 lines
1.1 KiB
C++
40 lines
1.1 KiB
C++
#include "rust.hh"
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#include "builtins.hh"
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#include "compression.hh"
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namespace nix {
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void builtinUnpackChannel(const BasicDerivation & drv)
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{
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auto getAttr = [&](const 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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Path out = getAttr("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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auto source = sinkToSource([&](Sink & sink) {
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auto decompressor =
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hasSuffix(src, ".bz2") ? makeDecompressionSink("bzip2", sink) :
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hasSuffix(src, ".xz") ? makeDecompressionSink("xz", sink) :
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makeDecompressionSink("none", sink);
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readFile(src, *decompressor);
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decompressor->finish();
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});
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unpack_tarfile(*source, 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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if (rename((out + "/" + entries[0].name).c_str(), (out + "/" + channelName).c_str()) == -1)
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throw SysError("renaming channel directory");
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}
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}
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