forked from lix-project/lix
bbe97dff8b
Most functions now take a StorePath argument rather than a Path (which is just an alias for std::string). The StorePath constructor ensures that the path is syntactically correct (i.e. it looks like <store-dir>/<base32-hash>-<name>). Similarly, functions like buildPaths() now take a StorePathWithOutputs, rather than abusing Path by adding a '!<outputs>' suffix. Note that the StorePath type is implemented in Rust. This involves some hackery to allow Rust values to be used directly in C++, via a helper type whose destructor calls the Rust type's drop() function. The main issue is the dynamic nature of C++ move semantics: after we have moved a Rust value, we should not call the drop function on the original value. So when we move a value, we set the original value to bitwise zero, and the destructor only calls drop() if the value is not bitwise zero. This should be sufficient for most types. Also lots of minor cleanups to the C++ API to make it more modern (e.g. using std::optional and std::string_view in some places).
69 lines
2.3 KiB
C++
Executable file
69 lines
2.3 KiB
C++
Executable file
#include "shared.hh"
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#include "store-api.hh"
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#include "legacy.hh"
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using namespace nix;
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static int _main(int argc, char ** argv)
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{
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{
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auto gzip = false;
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auto toMode = true;
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auto includeOutputs = false;
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auto dryRun = false;
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auto useSubstitutes = NoSubstitute;
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std::string sshHost;
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PathSet storePaths;
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parseCmdLine(argc, argv, [&](Strings::iterator & arg, const Strings::iterator & end) {
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if (*arg == "--help")
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showManPage("nix-copy-closure");
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else if (*arg == "--version")
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printVersion("nix-copy-closure");
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else if (*arg == "--gzip" || *arg == "--bzip2" || *arg == "--xz") {
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if (*arg != "--gzip")
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printMsg(lvlError, format("Warning: '%1%' is not implemented, falling back to gzip") % *arg);
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gzip = true;
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} else if (*arg == "--from")
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toMode = false;
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else if (*arg == "--to")
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toMode = true;
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else if (*arg == "--include-outputs")
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includeOutputs = true;
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else if (*arg == "--show-progress")
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printMsg(lvlError, "Warning: '--show-progress' is not implemented");
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else if (*arg == "--dry-run")
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dryRun = true;
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else if (*arg == "--use-substitutes" || *arg == "-s")
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useSubstitutes = Substitute;
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else if (sshHost.empty())
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sshHost = *arg;
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else
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storePaths.insert(*arg);
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return true;
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});
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initPlugins();
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if (sshHost.empty())
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throw UsageError("no host name specified");
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auto remoteUri = "ssh://" + sshHost + (gzip ? "?compress=true" : "");
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auto to = toMode ? openStore(remoteUri) : openStore();
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auto from = toMode ? openStore() : openStore(remoteUri);
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StorePathSet storePaths2;
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for (auto & path : storePaths)
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storePaths2.insert(from->followLinksToStorePath(path));
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StorePathSet closure;
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from->computeFSClosure(storePaths2, closure, false, includeOutputs);
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copyPaths(from, to, closure, NoRepair, NoCheckSigs, useSubstitutes);
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return 0;
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}
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}
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static RegisterLegacyCommand s1("nix-copy-closure", _main);
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