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hydra-module.nix: add 'useSubstitutes' option to control use of binary caches

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Gives users who want to use binary caches a way to do so without messing
with module internals. Fixes https://github.com/NixOS/hydra/issues/297.
This commit is contained in:
Peter Simons 2016-04-19 16:12:48 +02:00
parent 995f3b21db
commit 3ca0e50e01
1 changed files with 15 additions and 1 deletions
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16
hydra-module.nix
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@ -169,6 +169,20 @@ in
example = [ "/etc/nix/machines" "/var/lib/hydra/provisioner/machines" ];
description = "List of files containing build machines.";
};
useSubstitutes = mkOption {
type = types.bool;
default = false;
description = ''
Whether to use binary caches for downloading store paths. Note that
binary substitutions trigger (a potentially large number of) additional
HTTP requests that slow down the queue monitor thread significantly.
Also, this Hydra instance will serve those downloaded store paths to
its users with its own signature attached as if it had built them
itself, so don't enable this feature unless your active binary caches
are absolute trustworthy.
'';
};
};
};
@ -310,7 +324,7 @@ in
IN_SYSTEMD = "1"; # to get log severity levels
};
serviceConfig =
{ ExecStart = "@${cfg.package}/bin/hydra-queue-runner hydra-queue-runner -v --option build-use-substitutes false";
{ ExecStart = "@${cfg.package}/bin/hydra-queue-runner hydra-queue-runner -v --option build-use-substitutes ${if optionalString cfg.useSubstitutes then "true" else "false"}";
ExecStopPost = "${cfg.package}/bin/hydra-queue-runner --unlock";
User = "hydra-queue-runner";
Restart = "always";