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78ac3eb4eb
nix-store --export, nix-store --dump, and nix dump-path would previously
fail silently if writing the data out failed, because
a) FdSink::write ignored exceptions, and
b) the commands relied on FdSink's destructor, which ignores
exceptions, to flush the data out.
This could cause rather opaque issues with installing nixos, because
nix-store --export would happily proceed even if it couldn't write its
data out (e.g. if nix-store --import on the other side of the pipe
failed).
This commit adds tests that expose these issues in the nix-store
commands, and fixes them for all three.
37 lines
841 B
C++
37 lines
841 B
C++
#include "command.hh"
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#include "store-api.hh"
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using namespace nix;
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struct CmdDumpPath : StorePathCommand
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{
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std::string name() override
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{
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return "dump-path";
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}
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std::string description() override
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{
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return "dump a store path to stdout (in NAR format)";
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}
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Examples examples() override
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{
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return {
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Example{
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"To get a NAR from the binary cache https://cache.nixos.org/:",
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"nix dump-path --store https://cache.nixos.org/ /nix/store/7crrmih8c52r8fbnqb933dxrsp44md93-glibc-2.25"
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},
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};
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}
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void run(ref<Store> store, const Path & storePath) override
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{
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FdSink sink(STDOUT_FILENO);
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store->narFromPath(storePath, sink);
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sink.flush();
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}
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};
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static RegisterCommand r1(make_ref<CmdDumpPath>());
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