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https://github.com/NixOS/nix
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cc24766fa6
For example, instead of doing
#include "nix/store-config.hh"
#include "nix/derived-path.hh"
Now do
#include "nix/store/config.hh"
#include "nix/store/derived-path.hh"
This was originally planned in the issue, and also recent requested by
Eelco.
Most of the change is purely mechanical. There is just one small
additional issue. See how, in the example above, we took this
opportunity to also turn `<comp>-config.hh` into `<comp>/config.hh`.
Well, there was already a `nix/util/config.{cc,hh}`. Even though there
is not a public configuration header for libutil (which also would be
called `nix/util/config.{cc,hh}`) that's still confusing, To avoid any
such confusion, we renamed that to `nix/util/configuration.{cc,hh}`.
Finally, note that the libflake headers already did this, so we didn't
need to do anything to them. We wouldn't want to mistakenly get
`nix/flake/flake/flake.hh`!
Progress on #7876
99 lines
3 KiB
C++
99 lines
3 KiB
C++
#include "nix/util/serialise.hh"
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#include "nix/store/store-api.hh"
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#include "nix/util/archive.hh"
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#include "nix/store/common-protocol.hh"
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#include "nix/store/common-protocol-impl.hh"
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#include <algorithm>
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namespace nix {
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void Store::exportPaths(const StorePathSet & paths, Sink & sink)
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{
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auto sorted = topoSortPaths(paths);
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std::reverse(sorted.begin(), sorted.end());
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for (auto & path : sorted) {
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sink << 1;
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exportPath(path, sink);
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}
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sink << 0;
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}
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void Store::exportPath(const StorePath & path, Sink & sink)
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{
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auto info = queryPathInfo(path);
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HashSink hashSink(HashAlgorithm::SHA256);
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TeeSink teeSink(sink, hashSink);
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narFromPath(path, teeSink);
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/* Refuse to export paths that have changed. This prevents
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filesystem corruption from spreading to other machines.
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Don't complain if the stored hash is zero (unknown). */
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Hash hash = hashSink.currentHash().first;
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if (hash != info->narHash && info->narHash != Hash(info->narHash.algo))
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throw Error("hash of path '%s' has changed from '%s' to '%s'!",
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printStorePath(path), info->narHash.to_string(HashFormat::Nix32, true), hash.to_string(HashFormat::Nix32, true));
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teeSink
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<< exportMagic
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<< printStorePath(path);
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CommonProto::write(*this,
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CommonProto::WriteConn { .to = teeSink },
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info->references);
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teeSink
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<< (info->deriver ? printStorePath(*info->deriver) : "")
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<< 0;
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}
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StorePaths Store::importPaths(Source & source, CheckSigsFlag checkSigs)
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{
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StorePaths res;
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while (true) {
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auto n = readNum<uint64_t>(source);
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if (n == 0) break;
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if (n != 1) throw Error("input doesn't look like something created by 'nix-store --export'");
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/* Extract the NAR from the source. */
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StringSink saved;
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TeeSource tee { source, saved };
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NullFileSystemObjectSink ether;
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parseDump(ether, tee);
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uint32_t magic = readInt(source);
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if (magic != exportMagic)
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throw Error("Nix archive cannot be imported; wrong format");
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auto path = parseStorePath(readString(source));
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//Activity act(*logger, lvlInfo, "importing path '%s'", info.path);
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auto references = CommonProto::Serialise<StorePathSet>::read(*this,
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CommonProto::ReadConn { .from = source });
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auto deriver = readString(source);
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auto narHash = hashString(HashAlgorithm::SHA256, saved.s);
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ValidPathInfo info { path, narHash };
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if (deriver != "")
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info.deriver = parseStorePath(deriver);
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info.references = references;
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info.narSize = saved.s.size();
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// Ignore optional legacy signature.
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if (readInt(source) == 1)
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readString(source);
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// Can't use underlying source, which would have been exhausted
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auto source = StringSource(saved.s);
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addToStore(info, source, NoRepair, checkSigs);
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res.push_back(info.path);
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}
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return res;
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}
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}
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