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nix-copy-closure: Implement in C++.
Tests fail currently because the database is not given proper hashes in the VM
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@ -81,6 +81,8 @@ Makefile.config
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# /src/nix-build/
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/src/nix-build/nix-build
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/src/nix-copy-closure/nix-copy-closure
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/src/build-remote/build-remote
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# /tests/
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1
Makefile
1
Makefile
@ -11,6 +11,7 @@ makefiles = \
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src/nix-env/local.mk \
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src/nix-daemon/local.mk \
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src/nix-collect-garbage/local.mk \
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src/nix-copy-closure/local.mk \
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src/nix-prefetch-url/local.mk \
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src/buildenv/local.mk \
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src/resolve-system-dependencies/local.mk \
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@ -1,8 +1,3 @@
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nix_bin_scripts := \
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$(d)/nix-copy-closure \
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bin-scripts += $(nix_bin_scripts)
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nix_noinst_scripts := \
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$(d)/build-remote.pl \
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$(d)/nix-http-export.cgi \
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@ -16,4 +11,4 @@ profiledir = $(sysconfdir)/profile.d
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$(eval $(call install-file-as, $(d)/nix-profile.sh, $(profiledir)/nix.sh, 0644))
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$(eval $(call install-program-in, $(d)/build-remote.pl, $(libexecdir)/nix))
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clean-files += $(nix_bin_scripts) $(nix_noinst_scripts)
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clean-files += $(nix_noinst_scripts)
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@ -1,103 +0,0 @@
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#! @perl@ -w @perlFlags@
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use utf8;
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use strict;
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use Nix::SSH;
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use Nix::Config;
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use Nix::Store;
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use Nix::CopyClosure;
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use List::Util qw(sum);
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binmode STDERR, ":encoding(utf8)";
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if (scalar @ARGV < 1) {
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print STDERR <<EOF
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Usage: nix-copy-closure [--from | --to] HOSTNAME [--gzip] [--bzip2] [--xz] PATHS...
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EOF
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;
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exit 1;
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}
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# Get the target host.
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my $sshHost;
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my $toMode = 1;
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my $includeOutputs = 0;
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my $dryRun = 0;
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my $useSubstitutes = 0;
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my $verbosity = 1;
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# !!! Copied from nix-pack-closure, should put this in a module.
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my @storePaths = ();
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while (@ARGV) {
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my $arg = shift @ARGV;
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if ($arg eq "--help") {
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exec "man nix-copy-closure" or die;
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}
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elsif ($arg eq "--gzip" || $arg eq "--bzip2" || $arg eq "--xz") {
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warn "$0: ‘$arg’ is not implemented\n" if $arg ne "--gzip";
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push @globalSshOpts, "-C";
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}
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elsif ($arg eq "--from") {
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$toMode = 0;
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}
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elsif ($arg eq "--to") {
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$toMode = 1;
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}
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elsif ($arg eq "--include-outputs") {
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$includeOutputs = 1;
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}
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elsif ($arg eq "--show-progress") {
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warn "$0: ‘$arg’ is not implemented\n";
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}
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elsif ($arg eq "--dry-run") {
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$dryRun = 1;
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}
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elsif ($arg eq "--use-substitutes" || $arg eq "-s") {
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$useSubstitutes = 1;
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}
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elsif ($arg eq "-v") {
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$verbosity++;
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setVerbosity($verbosity);
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}
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elsif (!defined $sshHost) {
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$sshHost = $arg;
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}
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else {
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push @storePaths, $arg;
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}
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}
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die "$0: you did not specify a host name\n" unless defined $sshHost;
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if ($toMode) { # Copy TO the remote machine.
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Nix::CopyClosure::copyTo(
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$sshHost, [ @storePaths ],
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$includeOutputs, $dryRun, $useSubstitutes);
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}
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else { # Copy FROM the remote machine.
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my ($from, $to) = connectToRemoteNix($sshHost, []);
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# Query the closure of the given store paths on the remote
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# machine. Paths are assumed to be store paths; there is no
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# resolution (following of symlinks).
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syswrite($to, pack("L<x4L<x4", 7, $includeOutputs ? 1 : 0)) or die;
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writeStrings(\@storePaths, $to);
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my @missing = grep { !isValidPath($_) } readStrings($from);
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# Export the store paths on the remote machine and import them locally.
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if (scalar @missing > 0) {
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print STDERR "copying ", scalar @missing, " missing paths from ‘$sshHost’...\n";
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writeInt(5, $to); # == cmdExportPaths
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writeInt(0, $to); # obsolete
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writeStrings(\@missing, $to);
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importPaths(fileno($from), 1);
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}
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}
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@ -9,7 +9,6 @@
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#include "shared.hh"
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#include "pathlocks.hh"
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#include "globals.hh"
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#include "serve-protocol.hh"
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#include "serialise.hh"
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#include "store-api.hh"
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#include "derivations.hh"
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@ -8,4 +8,4 @@ build-remote_LIBS = libmain libutil libformat libstore
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build-remote_SOURCES := $(d)/build-remote.cc
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build-remote_CXXFLAGS = -DSYSCONFDIR="\"$(sysconfdir)\"" -Isrc/nix-store
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build-remote_CXXFLAGS = -DSYSCONFDIR="\"$(sysconfdir)\""
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@ -39,6 +39,8 @@ private:
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string uri;
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Path key;
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bool compress;
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};
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SSHStore::SSHStore(string uri, const Params & params, size_t maxConnections)
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@ -48,6 +50,7 @@ SSHStore::SSHStore(string uri, const Params & params, size_t maxConnections)
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, socketPath((Path) tmpDir + "/ssh.sock")
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, uri(std::move(uri))
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, key(get(params, "ssh-key", ""))
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, compress(get(params, "compress", "") == "true")
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{
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/* open a connection and perform the handshake to verify all is well */
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connections->get();
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@ -90,11 +93,12 @@ ref<FSAccessor> SSHStore::getFSAccessor()
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ref<RemoteStore::Connection> SSHStore::openConnection()
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{
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if ((pid_t) sshMaster == -1) {
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auto flags = compress ? "-NMCS" : "-NMS";
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sshMaster = startProcess([&]() {
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if (key.empty())
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execlp("ssh", "ssh", "-N", "-M", "-S", socketPath.c_str(), uri.c_str(), NULL);
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execlp("ssh", "ssh", flags, socketPath.c_str(), uri.c_str(), NULL);
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else
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execlp("ssh", "ssh", "-N", "-M", "-S", socketPath.c_str(), "-i", key.c_str(), uri.c_str(), NULL);
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execlp("ssh", "ssh", flags, socketPath.c_str(), "-i", key.c_str(), uri.c_str(), NULL);
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throw SysError("starting ssh master");
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});
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}
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@ -4,6 +4,7 @@
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#include "util.hh"
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#include "nar-info-disk-cache.hh"
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#include "thread-pool.hh"
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#include "derivations.hh"
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#include <future>
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@ -699,8 +700,27 @@ std::list<ref<Store>> getDefaultSubstituters()
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}
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void copyPaths(ref<Store> from, ref<Store> to, const Paths & storePaths)
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void copyPaths(ref<Store> from, ref<Store> to, const Paths & storePaths, bool substitute)
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{
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if (substitute) {
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/* Filter out .drv files (we don't want to build anything). */
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PathSet paths2;
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for (auto & path : storePaths)
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if (!isDerivation(path)) paths2.insert(path);
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unsigned long long downloadSize, narSize;
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PathSet willBuild, willSubstitute, unknown;
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to->queryMissing(PathSet(paths2.begin(), paths2.end()),
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willBuild, willSubstitute, unknown, downloadSize, narSize);
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/* FIXME: should use ensurePath(), but it only
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does one path at a time. */
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if (!willSubstitute.empty())
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try {
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to->buildPaths(willSubstitute);
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} catch (Error & e) {
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printMsg(lvlError, format("warning: %1%") % e.msg());
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}
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}
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std::string copiedLabel = "copied";
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logger->setExpected(copiedLabel, storePaths.size());
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@ -625,7 +625,7 @@ void removeTempRoots();
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ref<Store> openStore(const std::string & uri = getEnv("NIX_REMOTE"));
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void copyPaths(ref<Store> from, ref<Store> to, const Paths & storePaths);
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void copyPaths(ref<Store> from, ref<Store> to, const Paths & storePaths, bool substitute = false);
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enum StoreType {
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tDaemon,
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7
src/nix-copy-closure/local.mk
Normal file
7
src/nix-copy-closure/local.mk
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@ -0,0 +1,7 @@
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programs += nix-copy-closure
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nix-copy-closure_DIR := $(d)
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nix-copy-closure_LIBS = libmain libutil libformat libstore
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nix-copy-closure_SOURCES := $(d)/nix-copy-closure.cc
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src/nix-copy-closure/nix-copy-closure.cc
Executable file
60
src/nix-copy-closure/nix-copy-closure.cc
Executable file
@ -0,0 +1,60 @@
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#include "shared.hh"
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#include "store-api.hh"
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using namespace nix;
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int main(int argc, char ** argv)
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{
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return handleExceptions(argv[0], [&]() {
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initNix();
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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 = false;
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auto sshHost = string{};
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auto storePaths = PathSet{};
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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 = true;
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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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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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if (includeOutputs) {
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auto newPaths = PathSet{};
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for (const auto & p : storePaths) {
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auto outputs = from->queryDerivationOutputs(p);
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newPaths.insert(outputs.begin(), outputs.end());
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}
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storePaths.insert(newPaths.begin(), newPaths.end());
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}
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copyPaths(from, to, Paths(storePaths.begin(), storePaths.end()), useSubstitutes);
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});
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}
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