forked from lix-project/lix
00b2c05749
For example, $ NIX_REMOTE=file:///my-cache nix ls-store -lR /nix/store/f4kbgl8shhyy76rkk3nbxr0lz8d2ip7q-binutils-2.23.1 dr-xr-xr-x 0 ./bin -r-xr-xr-x 30748 ./bin/addr2line -r-xr-xr-x 66973 ./bin/ar ... Similarly, "nix ls-nar" lists the contents of a NAR file, "nix cat-nar" extracts a file from a NAR file, and "nix cat-store" extract a file from a Nix store.
75 lines
1.5 KiB
C++
75 lines
1.5 KiB
C++
#include "command.hh"
|
||
#include "store-api.hh"
|
||
#include "fs-accessor.hh"
|
||
#include "nar-accessor.hh"
|
||
|
||
using namespace nix;
|
||
|
||
struct MixCat : virtual Args
|
||
{
|
||
std::string path;
|
||
|
||
void cat(ref<FSAccessor> accessor)
|
||
{
|
||
auto st = accessor->stat(path);
|
||
if (st.type == FSAccessor::Type::tMissing)
|
||
throw Error(format("path ‘%1%’ does not exist") % path);
|
||
if (st.type != FSAccessor::Type::tRegular)
|
||
throw Error(format("path ‘%1%’ is not a regular file") % path);
|
||
|
||
std::cout << accessor->readFile(path);
|
||
}
|
||
};
|
||
|
||
struct CmdCatStore : StoreCommand, MixCat
|
||
{
|
||
CmdCatStore()
|
||
{
|
||
expectArg("path", &path);
|
||
}
|
||
|
||
std::string name() override
|
||
{
|
||
return "cat-store";
|
||
}
|
||
|
||
std::string description() override
|
||
{
|
||
return "print the contents of a store file on stdout";
|
||
}
|
||
|
||
void run(ref<Store> store) override
|
||
{
|
||
cat(store->getFSAccessor());
|
||
}
|
||
};
|
||
|
||
struct CmdCatNar : StoreCommand, MixCat
|
||
{
|
||
Path narPath;
|
||
|
||
CmdCatNar()
|
||
{
|
||
expectArg("nar", &narPath);
|
||
expectArg("path", &path);
|
||
}
|
||
|
||
std::string name() override
|
||
{
|
||
return "cat-nar";
|
||
}
|
||
|
||
std::string description() override
|
||
{
|
||
return "print the contents of a file inside a NAR file";
|
||
}
|
||
|
||
void run(ref<Store> store) override
|
||
{
|
||
cat(makeNarAccessor(make_ref<std::string>(readFile(narPath))));
|
||
}
|
||
};
|
||
|
||
static RegisterCommand r1(make_ref<CmdCatStore>());
|
||
static RegisterCommand r2(make_ref<CmdCatNar>());
|