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Respect max-substitution-jobs again

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This broke in #11005. Any number of PathSubstitutionGoals would
be woken up by a single build slot becoming available. If there
are a lot of substitution goals active, this could lead to us
running out of file descriptors (especially on macOS where the
default limit is 256).

(cherry picked from commit a33cb8af56)
This commit is contained in:
Eelco Dolstra 2024-09-02 17:28:11 +02:00 • committed by Mergify
parent 9d8669b14a
commit 0c25bea7cc
1 changed files with 1 additions and 1 deletions
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2
src/libstore/build/substitution-goal.cc
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@ -183,7 +183,7 @@ Goal::Co PathSubstitutionGoal::tryToRun(StorePath subPath, nix::ref<Store> sub,
/* Make sure that we are allowed to start a substitution. Note that even
if maxSubstitutionJobs == 0, we still allow a substituter to run. This
prevents infinite waiting. */
if (worker.getNrSubstitutions() >= std::max(1U, (unsigned int) settings.maxSubstitutionJobs)) {
while (worker.getNrSubstitutions() >= std::max(1U, (unsigned int) settings.maxSubstitutionJobs)) {
worker.waitForBuildSlot(shared_from_this());
co_await Suspend{};
}