forked from mirrors/nixpkgs
26 lines
787 B
Nix
26 lines
787 B
Nix
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{pkgs, config, ...}:
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let
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inherit (pkgs.lib) mkOption filter concatMap concatStringsSep;
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failed = map (x : x.message) (filter (x: ! x.assertion) config.assertions);
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in
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{
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assertions = mkOption {
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default = [];
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example = [{ assertion = false; msg = "you can't enable this for that reason"; }];
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merge = pkgs.lib.mergeListOption;
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description = ''
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Add something like this
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assertions = mkAlways [ { assertion = false; message = "false should have been true"; } ];
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to your upstart-job.
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'';
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};
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environment = {
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# extraPackages are evaluated always. Thus the assertions are checked as well. hacky!
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extraPackages = if [] == failed then [] else throw "\n!! failed assertions: !!\n${concatStringsSep "\n" (map (x: "- ${x}") failed)}";
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};
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}
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