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nix-copy-closure: Implement in C++.

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Tests fail currently because the database is not given proper hashes in the VM
This commit is contained in:
Shea Levy 2016-08-10 10:44:39 -04:00
parent 8af062f372
commit bfa41eb671
11 changed files with 100 additions and 115 deletions
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60
src/nix-copy-closure/nix-copy-closure.cc Executable file
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#include "shared.hh"
#include "store-api.hh"
using namespace nix;
int main(int argc, char ** argv)
{
return handleExceptions(argv[0], [&]() {
initNix();
auto gzip = false;
auto toMode = true;
auto includeOutputs = false;
auto dryRun = false;
auto useSubstitutes = false;
auto sshHost = string{};
auto storePaths = PathSet{};
parseCmdLine(argc, argv, [&](Strings::iterator & arg, const Strings::iterator & end) {
if (*arg == "--help")
showManPage("nix-copy-closure");
else if (*arg == "--version")
printVersion("nix-copy-closure");
else if (*arg == "--gzip" || *arg == "--bzip2" || *arg == "--xz") {
if (*arg != "--gzip")
printMsg(lvlError, format("Warning: ‘%1%’ is not implemented, falling back to gzip") % *arg);
gzip = true;
} else if (*arg == "--from")
toMode = false;
else if (*arg == "--to")
toMode = true;
else if (*arg == "--include-outputs")
includeOutputs = true;
else if (*arg == "--show-progress")
printMsg(lvlError, "Warning: ‘--show-progress’ is not implemented");
else if (*arg == "--dry-run")
dryRun = true;
else if (*arg == "--use-substitutes" || *arg == "-s")
useSubstitutes = true;
else if (sshHost.empty())
sshHost = *arg;
else
storePaths.insert(*arg);
return true;
});
if (sshHost.empty())
throw UsageError("no host name specified");
auto remoteUri = "ssh://" + sshHost + (gzip ? "?compress=true" : "");
auto to = toMode ? openStore(remoteUri) : openStore();
auto from = toMode ? openStore() : openStore(remoteUri);
if (includeOutputs) {
auto newPaths = PathSet{};
for (const auto & p : storePaths) {
auto outputs = from->queryDerivationOutputs(p);
newPaths.insert(outputs.begin(), outputs.end());
}
storePaths.insert(newPaths.begin(), newPaths.end());
}
copyPaths(from, to, Paths(storePaths.begin(), storePaths.end()), useSubstitutes);
});
}