tvl-depot/src/nix/dump-path.cc
Eelco Dolstra 2da6a42448
nix dump-path: Add
This is primarily useful for extracting NARs from other stores (like
binary caches), which "nix-store --dump" cannot do.
2017-05-04 14:21:22 +02:00

35 lines
819 B
C++

#include "command.hh"
#include "store-api.hh"
using namespace nix;
struct CmdDumpPath : StorePathCommand
{
std::string name() override
{
return "dump-path";
}
std::string description() override
{
return "dump a store path to stdout (in NAR format)";
}
Examples examples() override
{
return {
Example{
"To get a NAR from the binary cache https://cache.nixos.org/:",
"nix dump-path --store https://cache.nixos.org/ /nix/store/7crrmih8c52r8fbnqb933dxrsp44md93-glibc-2.25"
},
};
}
void run(ref<Store> store, const Path & storePath) override
{
FdSink sink(STDOUT_FILENO);
store->narFromPath(storePath, sink);
}
};
static RegisterCommand r1(make_ref<CmdDumpPath>());