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#include "command.hh"
#include "shared.hh"
#include "store-api.hh"
#include "sync.hh"
#include "thread-pool.hh"
#include <atomic>
using namespace nix;
struct CmdCopy : StorePathsCommand
{
std::string srcUri, dstUri;
CmdCopy()
{
mkFlag(0, "from", "store-uri", "URI of the source Nix store", &srcUri);
mkFlag(0, "to", "store-uri", "URI of the destination Nix store", &dstUri);
}
std::string name() override
{
return "copy";
}
std::string description() override
{
return "copy paths between Nix stores";
}
Examples examples() override
{
return {
Example{
"To copy Firefox to the local store to a binary cache in file:///tmp/cache:",
"nix copy --to file:///tmp/cache -r $(type -p firefox)"
},
};
}
void run(ref<Store> store, Paths storePaths) override
{
if (srcUri.empty() && dstUri.empty())
throw UsageError("you must pass ‘--from’ and/or ‘--to’");
ref<Store> srcStore = srcUri.empty() ? store : openStoreAt(srcUri);
ref<Store> dstStore = dstUri.empty() ? store : openStoreAt(dstUri);
std::string copiedLabel = "copied";
logger->setExpected(copiedLabel, storePaths.size());
ThreadPool pool;
processGraph<Path>(pool,
PathSet(storePaths.begin(), storePaths.end()),
[&](const Path & storePath) {
return srcStore->queryPathInfo(storePath)->references;
},
[&](const Path & storePath) {
checkInterrupt();
if (!dstStore->isValidPath(storePath)) {
Activity act(*logger, lvlInfo, format("copying ‘%s’...") % storePath);
StringSink sink;
srcStore->exportPaths({storePath}, false, sink);
StringSource source(*sink.s);
dstStore->importPaths(false, source, 0);
logger->incProgress(copiedLabel);
} else
logger->incExpected(copiedLabel, -1);
});
pool.process();
}
};
static RegisterCommand r1(make_ref<CmdCopy>());
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