forked from lix-project/lix
41633f9f73
This also gets rid of --log-type, since the nested log type isn't useful in a multi-threaded situation, and nobody cares about the "pretty" log type.
83 lines
2.2 KiB
C++
83 lines
2.2 KiB
C++
#include "command.hh"
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#include "shared.hh"
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#include "store-api.hh"
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#include "sync.hh"
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#include "thread-pool.hh"
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#include <atomic>
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using namespace nix;
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struct CmdCopy : StorePathsCommand
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{
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std::string srcUri, dstUri;
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CmdCopy()
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{
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mkFlag(0, "from", "store-uri", "URI of the source Nix store", &srcUri);
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mkFlag(0, "to", "store-uri", "URI of the destination Nix store", &dstUri);
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}
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std::string name() override
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{
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return "copy";
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}
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std::string description() override
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{
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return "copy paths between Nix stores";
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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 copy Firefox to the local store to a binary cache in file:///tmp/cache:",
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"nix copy --to file:///tmp/cache -r $(type -p firefox)"
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},
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};
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}
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void run(ref<Store> store, Paths storePaths) override
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{
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if (srcUri.empty() && dstUri.empty())
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throw UsageError("you must pass ‘--from’ and/or ‘--to’");
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ref<Store> srcStore = srcUri.empty() ? store : openStoreAt(srcUri);
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ref<Store> dstStore = dstUri.empty() ? store : openStoreAt(dstUri);
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std::string copiedLabel = "copied";
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logger->setExpected(copiedLabel, storePaths.size());
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ThreadPool pool;
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processGraph<Path>(pool,
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PathSet(storePaths.begin(), storePaths.end()),
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[&](const Path & storePath) {
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return srcStore->queryPathInfo(storePath)->references;
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},
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[&](const Path & storePath) {
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checkInterrupt();
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if (!dstStore->isValidPath(storePath)) {
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Activity act(*logger, lvlInfo, format("copying ‘%s’...") % storePath);
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StringSink sink;
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srcStore->exportPaths({storePath}, false, sink);
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StringSource source(*sink.s);
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dstStore->importPaths(false, source, 0);
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logger->incProgress(copiedLabel);
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} else
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logger->incExpected(copiedLabel, -1);
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});
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pool.process();
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}
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};
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static RegisterCommand r1(make_ref<CmdCopy>());
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