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Move deleteFromStore()

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This commit is contained in:
Eelco Dolstra 2021-10-14 13:34:48 +02:00
parent 0be8cc1466
commit 0317ffdad3
2 changed files with 25 additions and 26 deletions
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49
src/libstore/gc.cc
View file

@ -479,26 +479,6 @@ struct LocalStore::GCState
};
void LocalStore::deleteFromStore(GCState & state, std::string_view baseName)
{
Path path = storeDir + "/" + std::string(baseName);
Path realPath = realStoreDir + "/" + std::string(baseName);
printInfo("deleting '%1%'", path);
state.results.paths.insert(path);
uint64_t bytesFreed;
deletePath(realPath, bytesFreed);
state.results.bytesFreed += bytesFreed;
if (state.results.bytesFreed > state.options.maxFreed) {
printInfo("deleted more than %d bytes; stopping", state.options.maxFreed);
throw GCLimitReached();
}
}
/* Unlink all files in /nix/store/.links that have a link count of 1,
which indicates that there are no other links and so they can be
safely deleted. FIXME: race condition with optimisePath(): we
@ -677,10 +657,31 @@ void LocalStore::collectGarbage(const GCOptions & options, GCResults & results)
state.roots.insert(root.first);
}
/* Helper function that deletes a path from the store and throws
GCLimitReached if we've deleted enough garbage. */
auto deleteFromStore = [&](std::string_view baseName)
{
Path path = storeDir + "/" + std::string(baseName);
Path realPath = realStoreDir + "/" + std::string(baseName);
printInfo("deleting '%1%'", path);
state.results.paths.insert(path);
uint64_t bytesFreed;
deletePath(realPath, bytesFreed);
state.results.bytesFreed += bytesFreed;
if (state.results.bytesFreed > state.options.maxFreed) {
printInfo("deleted more than %d bytes; stopping", state.options.maxFreed);
throw GCLimitReached();
}
};
/* Helper function that visits all paths reachable from `start`
via the referrers edges and optionally derivers and derivation
output edges. If any of those paths is a root, then we cannot
delete this path. */
output edges. If none of those paths are roots, then all
visited paths are garbage and are deleted. */
auto deleteReferrersClosure = [&](const StorePath & start) {
StorePathSet visited;
std::queue<StorePath> todo;
@ -769,7 +770,7 @@ void LocalStore::collectGarbage(const GCOptions & options, GCResults & results)
if (!state.dead.insert(path).second) continue;
if (state.shouldDelete) {
invalidatePathChecked(path);
deleteFromStore(state, path.to_string());
deleteFromStore(path.to_string());
}
}
};
@ -813,7 +814,7 @@ void LocalStore::collectGarbage(const GCOptions & options, GCResults & results)
if (auto storePath = maybeParseStorePath(storeDir + "/" + name))
deleteReferrersClosure(*storePath);
else
deleteFromStore(state, name);
deleteFromStore(name);
}
} catch (GCLimitReached & e) {

2
src/libstore/local-store.hh
View file

@ -240,8 +240,6 @@ private:
struct GCState;
void deleteFromStore(GCState & state, std::string_view baseName);
void findRoots(const Path & path, unsigned char type, Roots & roots);
void findRootsNoTemp(Roots & roots, bool censor);