forked from lix-project/lix
40 lines
1.1 KiB
C++
40 lines
1.1 KiB
C++
|
#include "rust.hh"
|
||
|
|
#include "builtins.hh"
|
||
|
|
#include "compression.hh"
|
||
|
|
|
||
|
|
namespace nix {
|
||
|
|
|
||
|
|
void builtinUnpackChannel(const BasicDerivation & drv)
|
||
|
|
{
|
||
|
|
auto getAttr = [&](const string & name) {
|
||
|
|
auto i = drv.env.find(name);
|
||
|
|
if (i == drv.env.end()) throw Error("attribute '%s' missing", name);
|
||
|
|
return i->second;
|
||
|
|
};
|
||
|
|
|
||
|
|
Path out = getAttr("out");
|
||
|
|
auto channelName = getAttr("channelName");
|
||
|
|
auto src = getAttr("src");
|
||
|
|
|
||
|
|
createDirs(out);
|
||
|
|
|
||
|
|
auto source = sinkToSource([&](Sink & sink) {
|
||
|
|
auto decompressor =
|
||
|
|
hasSuffix(src, ".bz2") ? makeDecompressionSink("bzip2", sink) :
|
||
|
|
hasSuffix(src, ".xz") ? makeDecompressionSink("xz", sink) :
|
||
|
|
makeDecompressionSink("none", sink);
|
||
|
|
readFile(src, *decompressor);
|
||
|
|
decompressor->finish();
|
||
|
|
});
|
||
|
|
|
||
|
|
unpack_tarfile(*source, out);
|
||
|
|
|
||
|
|
auto entries = readDirectory(out);
|
||
|
|
if (entries.size() != 1)
|
||
|
|
throw Error("channel tarball '%s' contains more than one file", src);
|
||
|
|
if (rename((out + "/" + entries[0].name).c_str(), (out + "/" + channelName).c_str()) == -1)
|
||
|
|
throw SysError("renaming channel directory");
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|