forked from lix-project/lix
95abf9c402
This replaces nix-push. For example, $ nix copy --to file:///tmp/cache -r $(type -p firefox) copies the closure of firefox to the specified binary cache. And $ nix copy --from file:///tmp/cache --to s3://my-cache /nix/store/abcd... copies between two binary caches. It will also replace nix-copy-closure, once we have an SSHStore class, e.g. $ nix copy --from ssh://alice@machine /nix/store/abcd...
88 lines
2.2 KiB
C++
88 lines
2.2 KiB
C++
#include "command.hh"
|
||
#include "progress-bar.hh"
|
||
#include "shared.hh"
|
||
#include "store-api.hh"
|
||
#include "sync.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);
|
||
|
||
ProgressBar progressBar;
|
||
|
||
std::atomic<size_t> done{0};
|
||
std::atomic<size_t> total{storePaths.size()};
|
||
|
||
auto showProgress = [&]() {
|
||
return (format("[%d/%d copied]") % done % total).str();
|
||
};
|
||
|
||
progressBar.updateStatus(showProgress());
|
||
|
||
storePaths.reverse(); // FIXME: assumes reverse topo sort
|
||
|
||
for (auto & storePath : storePaths) {
|
||
checkInterrupt();
|
||
|
||
if (dstStore->isValidPath(storePath)) {
|
||
total--;
|
||
progressBar.updateStatus(showProgress());
|
||
continue;
|
||
}
|
||
|
||
auto activity(progressBar.startActivity(format("copying ‘%s’...") % storePath));
|
||
|
||
StringSink sink;
|
||
srcStore->exportPaths({storePath}, false, sink);
|
||
|
||
StringSource source(*sink.s);
|
||
dstStore->importPaths(false, source, 0);
|
||
|
||
done++;
|
||
progressBar.updateStatus(showProgress());
|
||
}
|
||
|
||
progressBar.done();
|
||
}
|
||
};
|
||
|
||
static RegisterCommand r1(make_ref<CmdCopy>());
|