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Add a test for auto-GC

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This currently fails because we're using POSIX file locks. So when the
garbage collector opens and closes its own temproots file, it causes
the lock to be released and then deleted by another GC instance.
This commit is contained in:
Eelco Dolstra 2019-08-02 17:07:33 +02:00
parent 320126aeeb
commit ec415d7166
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GPG key ID: 8170B4726D7198DE
4 changed files with 72 additions and 3 deletions
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9
src/libstore/gc.cc
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@ -871,7 +871,12 @@ void LocalStore::collectGarbage(const GCOptions & options, GCResults & results)
void LocalStore::autoGC(bool sync)
{
auto getAvail = [this]() {
static auto fakeFreeSpaceFile = getEnv("_NIX_TEST_FREE_SPACE_FILE", "");
auto getAvail = [this]() -> uint64_t {
if (!fakeFreeSpaceFile.empty())
return std::stoll(readFile(fakeFreeSpaceFile));
struct statvfs st;
if (statvfs(realStoreDir.c_str(), &st))
throw SysError("getting filesystem info about '%s'", realStoreDir);
@ -892,7 +897,7 @@ void LocalStore::autoGC(bool sync)
auto now = std::chrono::steady_clock::now();
if (now < state->lastGCCheck + std::chrono::seconds(5)) return;
if (now < state->lastGCCheck + std::chrono::seconds(settings.minFreeCheckInterval)) return;
auto avail = getAvail();