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Add a way to get all the outputs of a derivation with their label

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Generalize `queryDerivationOutputNames` and `queryDerivationOutputs` by
adding a `queryDerivationOutputMap` that returns the map
`outputName=>outputPath`

(not that this is not equivalent to merging the results of
`queryDerivationOutputs` and `queryDerivationOutputNames` as sets don't
preserve the order, so we would end up with an incorrect mapping).

squash! Add a way to get all the outputs of a derivation with their label

Rename StorePathMap to OutputPathMap
This commit is contained in:
regnat 2020-06-10 11:20:52 +02:00
parent 3c50e84387
commit d38f860c3e
10 changed files with 78 additions and 11 deletions
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38
src/libstore/remote-store.cc
View file

@ -38,6 +38,32 @@ void writeStorePaths(const Store & store, Sink & out, const StorePathSet & paths
out << store.printStorePath(i);
}
std::map<string, StorePath> readOutputPathMap(const Store & store, Source & from)
{
std::map<string, StorePath> pathMap;
auto rawInput = readStrings<Strings>(from);
auto curInput = rawInput.begin();
while (curInput != rawInput.end()) {
string thisKey = *curInput;
curInput = std::next(curInput);
if (curInput == rawInput.end()) {
throw Error("Got an odd number of elements from the daemon when trying to read a map… that's odd");
}
string thisValue = *curInput;
curInput = std::next(curInput);
pathMap.emplace(thisKey, store.parseStorePath(thisValue));
}
return pathMap;
}
void writeOutputPathMap(const Store & store, Sink & out, const std::map<string, StorePath> & pathMap)
{
out << 2*pathMap.size();
for (auto & i : pathMap) {
out << i.first;
out << store.printStorePath(i.second);
}
}
/* TODO: Separate these store impls into different files, give them better names */
RemoteStore::RemoteStore(const Params & params)
@ -412,12 +438,24 @@ StorePathSet RemoteStore::queryValidDerivers(const StorePath & path)
StorePathSet RemoteStore::queryDerivationOutputs(const StorePath & path)
{
auto conn(getConnection());
if (GET_PROTOCOL_MINOR(conn->daemonVersion) >= 0x16) {
return Store::queryDerivationOutputs(path);
}
conn->to << wopQueryDerivationOutputs << printStorePath(path);
conn.processStderr();
return readStorePaths<StorePathSet>(*this, conn->from);
}
OutputPathMap RemoteStore::queryDerivationOutputMap(const StorePath & path)
{
auto conn(getConnection());
conn->to << wopQueryDerivationOutputMap << printStorePath(path);
conn.processStderr();
return readOutputPathMap(*this, conn->from);
}
std::optional<StorePath> RemoteStore::queryPathFromHashPart(const std::string & hashPart)
{
auto conn(getConnection());