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Factor out bits of the worker protocol to use elsewhere

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This introduces some shared infrastructure for our notion of protocols.
We can then define multiple protocols in terms of that notion.
We an also express how particular protocols depend on each other.

For example, we can define a common protocol and a worker protocol,
where the second depends on the first in terms of the data types it can
read and write.

The "serve" protocol can just use the common one for now, but will
eventually need its own machinary just like the worker protocol for
version-aware serialisers
This commit is contained in:
John Ericson 2022-03-25 04:39:57 +00:00
parent aaef47a08e
commit be81764320
13 changed files with 542 additions and 251 deletions
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12
src/libstore/export-import.cc
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@ -1,8 +1,8 @@
#include "serialise.hh"
#include "store-api.hh"
#include "archive.hh"
#include "worker-protocol.hh"
#include "worker-protocol-impl.hh"
#include "common-protocol.hh"
#include "common-protocol-impl.hh"
#include <algorithm>
@ -46,8 +46,8 @@ void Store::exportPath(const StorePath & path, Sink & sink)
teeSink
<< exportMagic
<< printStorePath(path);
WorkerProto::write(*this,
WorkerProto::WriteConn { .to = teeSink },
CommonProto::write(*this,
CommonProto::WriteConn { .to = teeSink },
info->references);
teeSink
<< (info->deriver ? printStorePath(*info->deriver) : "")
@ -76,8 +76,8 @@ StorePaths Store::importPaths(Source & source, CheckSigsFlag checkSigs)
//Activity act(*logger, lvlInfo, "importing path '%s'", info.path);
auto references = WorkerProto::Serialise<StorePathSet>::read(*this,
WorkerProto::ReadConn { .from = source });
auto references = CommonProto::Serialise<StorePathSet>::read(*this,
CommonProto::ReadConn { .from = source });
auto deriver = readString(source);
auto narHash = hashString(htSHA256, saved.s);