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Store::computeFSClosure(): Support a set of paths

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This way, callers can exploits the parallelism of computeFSClosure()
when they have multiple paths that they need the (combined) closure of.
This commit is contained in:
Eelco Dolstra 2016-11-10 17:45:04 +01:00
parent 2af5d35fdc
commit dd77f7d593
5 changed files with 25 additions and 16 deletions
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3
src/libstore/build.cc
View file

@ -1249,8 +1249,7 @@ void DerivationGoal::inputsRealised()
}
/* Second, the input sources. */
for (auto & i : drv->inputSrcs)
worker.store.computeFSClosure(i, inputPaths);
worker.store.computeFSClosure(drv->inputSrcs, inputPaths);
debug(format("added input paths %1%") % showPaths(inputPaths));

12
src/libstore/misc.cc
View file

@ -8,7 +8,7 @@
namespace nix {
void Store::computeFSClosure(const Path & startPath,
void Store::computeFSClosure(const PathSet & startPaths,
PathSet & paths_, bool flipDirection, bool includeOutputs, bool includeDerivers)
{
struct State
@ -85,7 +85,8 @@ void Store::computeFSClosure(const Path & startPath,
});
};
enqueue(startPath);
for (auto & startPath : startPaths)
enqueue(startPath);
{
auto state(state_.lock());
@ -95,6 +96,13 @@ void Store::computeFSClosure(const Path & startPath,
}
void Store::computeFSClosure(const Path & startPath,
PathSet & paths_, bool flipDirection, bool includeOutputs, bool includeDerivers)
{
computeFSClosure(PathSet{startPath}, paths_, flipDirection, includeOutputs, includeDerivers);
}
void Store::queryMissing(const PathSet & targets,
PathSet & willBuild_, PathSet & willSubstitute_, PathSet & unknown_,
unsigned long long & downloadSize_, unsigned long long & narSize_)

10
src/libstore/store-api.hh
View file

@ -477,15 +477,19 @@ public:
ensurePath(). */
Derivation derivationFromPath(const Path & drvPath);
/* Place in `paths' the set of all store paths in the file system
/* Place in `out' the set of all store paths in the file system
closure of `storePath'; that is, all paths than can be directly
or indirectly reached from it. `paths' is not cleared. If
or indirectly reached from it. `out' is not cleared. If
`flipDirection' is true, the set of paths that can reach
`storePath' is returned; that is, the closures under the
`referrers' relation instead of the `references' relation is
returned. */
void computeFSClosure(const PathSet & paths,
PathSet & out, bool flipDirection = false,
bool includeOutputs = false, bool includeDerivers = false);
void computeFSClosure(const Path & path,
PathSet & paths, bool flipDirection = false,
PathSet & out, bool flipDirection = false,
bool includeOutputs = false, bool includeDerivers = false);
/* Given a set of paths that are to be built, return the set of

12
src/nix-store/nix-store.cc
View file

@ -424,10 +424,9 @@ static void opQuery(Strings opFlags, Strings opArgs)
case qRoots: {
PathSet referrers;
for (auto & i : opArgs) {
PathSet paths = maybeUseOutputs(store->followLinksToStorePath(i), useOutput, forceRealise);
for (auto & j : paths)
store->computeFSClosure(j, referrers, true,
settings.gcKeepOutputs, settings.gcKeepDerivations);
store->computeFSClosure(
maybeUseOutputs(store->followLinksToStorePath(i), useOutput, forceRealise),
referrers, true, settings.gcKeepOutputs, settings.gcKeepDerivations);
}
Roots roots = store->findRoots();
for (auto & i : roots)
@ -961,10 +960,9 @@ static void opServe(Strings opFlags, Strings opArgs)
case cmdQueryClosure: {
bool includeOutputs = readInt(in);
PathSet paths = readStorePaths<PathSet>(*store, in);
PathSet closure;
for (auto & i : paths)
store->computeFSClosure(i, closure, false, includeOutputs);
store->computeFSClosure(readStorePaths<PathSet>(*store, in),
closure, false, includeOutputs);
out << closure;
break;
}

4
src/nix/command.cc
View file

@ -106,8 +106,8 @@ void StorePathsCommand::run(ref<Store> store)
if (recursive) {
PathSet closure;
for (auto & storePath : storePaths)
store->computeFSClosure(storePath, closure, false, false);
store->computeFSClosure(PathSet(storePaths.begin(), storePaths.end()),
closure, false, false);
storePaths = Paths(closure.begin(), closure.end());
}
}