hydra/t/queue-runner/build-locally-with-substitutable-path.t

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use strict;
use warnings;
use Setup;
use Data::Dumper;
use Test2::V0;
my $ctx = test_context(
use_external_destination_store => 1
);
# This test is regarding https://github.com/NixOS/hydra/pull/1126
#
# A hydra instance was regularly failing to build derivations with:
#
# possibly transient failure building /nix/store/X.drv on localhost:
# dependency '/nix/store/Y' of '/nix/store/Y.drv' does not exist,
# and substitution is disabled
#
# However it would only fail when building on localhost, and it would only
# fail if the build output was already in the binary cache.
#
# This test replicates this scenario by having two jobs, underlyingJob and
# dependentJob. dependentJob depends on underlyingJob. We first build
# underlyingJob and copy it to an external cache. Then forcefully delete
# the output of underlyingJob, and build dependentJob. In order to pass
# it must either rebuild underlyingJob or fetch it from the cache.
subtest "Building, caching, and then garbage collecting the underlying job" => sub {
my $builds = $ctx->makeAndEvaluateJobset(
expression => "dependencies/underlyingOnly.nix",
build => 1
);
my $path = $builds->{"underlyingJob"}->buildoutputs->find({ name => "out" })->path;
ok(unlink(Hydra::Helper::Nix::gcRootFor($path)), "Unlinking the GC root for underlying Dependency succeeds");
(my $ret, my $stdout, my $stderr) = captureStdoutStderr(1, "nix-store", "--delete", $path);
is($ret, 0, "Deleting the underlying dependency should succeed");
};
subtest "Building the dependent job should now succeed, even though we're missing a local dependency" => sub {
my $builds = $ctx->makeAndEvaluateJobset(
expression => "dependencies/dependentOnly.nix"
);
ok(runBuild($builds->{"dependentJob"}), "building the job should succeed");
};
done_testing;