81 lines
1.8 KiB
Nix
81 lines
1.8 KiB
Nix
let
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# copied from <nixpkgs/lib>
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genAttrs = names: f:
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builtins.listToAttrs (map (n: { name = n; value = f n; }) names);
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mapAttrsToList = f: attrs:
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map (name: f name attrs.${name}) (builtins.attrNames attrs);
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# The list of systems supported by nixpkgs and hydra
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defaultSystems = [
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"aarch64-linux"
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"i686-linux"
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"x86_64-darwin"
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"x86_64-linux"
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];
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# eachSystem using defaultSystems
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eachDefaultSystem = eachSystem defaultSystems;
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# Builds a map from <attr>=value to <system>.<attr>=value for each system.
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#
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#
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eachSystem = systems: f:
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let
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op = attrs: system:
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let
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ret = f system;
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op = attrs: key:
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attrs //
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{
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${key} = (attrs.${key} or { }) // { ${system} = ret.${key}; };
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}
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;
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in
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builtins.foldl' op attrs (builtins.attrNames ret);
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in
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builtins.foldl' op { } systems
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;
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# Returns the structure used by `nix app`
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mkApp =
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{ drv
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, name ? drv.pname or drv.name
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, exePath ? drv.passthru.exePath or "/bin/${name}"
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}:
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{
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type = "app";
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program = "${drv}${exePath}";
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};
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# Nix flakes insists on having a flat attribute set of derivations in
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# various places like the `packages` and `checks` attributes.
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#
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# This function traverses a tree of attributes (by respecting
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# recurseIntoAttrs) and only returns their derivations, with a flattened
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# key-space.
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#
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# Eg:
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#
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# flattenTree { hello = pkgs.hello; gitAndTools = pkgs.gitAndTools };
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#
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# Returns:
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#
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# {
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# hello = «derivation»;
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# gitAndTools_git = «derivation»;
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# gitAndTools_hub = «derivation»;
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# # ...
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# }
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flattenTree = tree: import ./flattenTree.nix tree;
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in
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{
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inherit
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defaultSystems
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eachDefaultSystem
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eachSystem
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mkApp
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;
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}
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