outputs: merge pipe expression
add comments too
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1 changed files with 13 additions and 15 deletions
28
outputs.nix
28
outputs.nix
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@ -19,26 +19,24 @@ self = {
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versionInfoFixup = import ./pkgs/overlays/version-info-fixup.nix { inherit inputs; };
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};
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nixosConfigurations = let
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# list nix file paths in ./hosts to attributes in nixosConfigurations
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filePaths = lib.pipe ./hosts [
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builtins.readDir
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( lib.filterAttrs (name: type:
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( # regular .nix files
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(type == "regular" && lib.hasSuffix ".nix" name)
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|| # directories that contain a default.nix file
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(type == "directory" && builtins.pathExists "${./.}/hosts/${name}/default.nix")
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)
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# filter out files that start with .
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&& !lib.hasPrefix "." name
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))
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];
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nixosSystem = import "${inputs.nixpkgs}/nixos/lib/eval-config.nix";
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in
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# mapped list of nix file paths to attrSet with initialized NixOS configurations,
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# mapped atrrsed of nix file paths to attrSet with initialized NixOS configurations,
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# whose names are derived from file names
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lib.pipe filePaths [
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lib.pipe ./hosts [
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builtins.readDir
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# filter out files that are not .nix files, directories with default.nix or starting with . (dot, hidden files)
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( lib.filterAttrs (name: type:
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(
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(type == "regular" && lib.hasSuffix ".nix" name)
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|| (type == "directory" && builtins.pathExists "${./.}/hosts/${name}/default.nix")
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)
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&& !lib.hasPrefix "." name
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))
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(builtins.mapAttrs (name: type: {
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# remove .nix extension
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name = if type == "directory" then name else builtins.substring 0 (builtins.stringLength name - 4) name;
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# initialize NixOS configuration
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value = nixosSystem {
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inherit lib;
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modules = [
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