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.
74 lines
1.5 KiB
C++
74 lines
1.5 KiB
C++
#include "command.hh"
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#include "store-api.hh"
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#include "fs-accessor.hh"
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#include "nar-accessor.hh"
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using namespace nix;
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struct MixCat : virtual Args
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{
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std::string path;
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void cat(ref<FSAccessor> accessor)
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{
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auto st = accessor->stat(path);
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if (st.type == FSAccessor::Type::tMissing)
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throw Error(format("path ‘%1%’ does not exist") % path);
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if (st.type != FSAccessor::Type::tRegular)
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throw Error(format("path ‘%1%’ is not a regular file") % path);
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std::cout << accessor->readFile(path);
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}
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};
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struct CmdCatStore : StoreCommand, MixCat
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{
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CmdCatStore()
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{
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expectArg("path", &path);
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}
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std::string name() override
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{
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return "cat-store";
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}
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std::string description() override
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{
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return "print the contents of a store file on stdout";
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}
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void run(ref<Store> store) override
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{
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cat(store->getFSAccessor());
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}
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};
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struct CmdCatNar : StoreCommand, MixCat
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{
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Path narPath;
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CmdCatNar()
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{
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expectArg("nar", &narPath);
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expectArg("path", &path);
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}
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std::string name() override
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{
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return "cat-nar";
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}
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std::string description() override
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{
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return "print the contents of a file inside a NAR file";
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}
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void run(ref<Store> store) override
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{
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cat(makeNarAccessor(make_ref<std::string>(readFile(narPath))));
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}
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};
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static RegisterCommand r1(make_ref<CmdCatStore>());
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static RegisterCommand r2(make_ref<CmdCatNar>());
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