nixpkgs/maintainers/scripts/eval-release.nix

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# Evaluate `release.nix' like Hydra would (i.e. call each job
# attribute with the expected `system' argument). Too bad
# nix-instantiate can't to do this.
with import ../../pkgs/lib;
let
trace = if (builtins.getEnv "VERBOSE") == "1" then builtins.trace else (x: y: y);
rel = removeAttrs (import ../../pkgs/top-level/release.nix) [ "tarball" "xbursttools" ];
seqList = xs: res: fold (x: xs: seq x xs) res xs;
strictAttrs = as: seqList (attrValues as) as;
maybe = as: let y = builtins.tryEval (strictAttrs as); in if y.success then y.value else builtins.trace "FAIL" null;
call = attrs: flip mapAttrs attrs
(n: v: trace n (
if builtins.isFunction v then maybe (v { system = "i686-linux"; })
else if builtins.isAttrs v then call v
else null
));
# Add the recurseForDerivations attribute to ensure that
# nix-instantiate recurses into nested attribute sets.
recurse = attrs:
if isDerivation attrs
then attrs
else { recurseForDerivations = true; } // mapAttrs (n: v: recurse v) attrs;
in recurse (call rel)