A simple helper that makes it easy to package Nu scripts with Nix, including inline dependency declarations for external commands and other packaged scripts.
flake
nu
nushell
nix
improve dependency resolution logic; make `inputs` have a safer default
+21
-5
+21
-5
mkNuScript.nix
+21
-5
mkNuScript.nix
···
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2
pkgs,
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3
lib ? pkgs.lib,
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self ? null,
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-
inputs ? { },
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+
inputs ? null,
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script,
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name ? lib.removeSuffix ".nu" (baseNameOf script),
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version ? "unstable",
···
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segments = lib.splitString "." dep;
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scope = builtins.head segments;
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rest = builtins.tail segments;
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-
joinSegments = lib.concatStringsSep ".";
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+
error = "Dependency `${dep}` not found";
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in
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if (scope == "self" && rest != [ ]) then
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if self != null then
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-
self.packages.${system}.${joinSegments rest}
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+
lib.attrByPath (
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[
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"packages"
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+
system
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]
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+
++ rest
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) (throw error) self
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else
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throw "`self` was not passed to `mkNuScript` or is `null`, but a script references a dependency with the `self.` scope."
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else if (scope == "inputs" && rest != [ ]) then
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-
inputs.${builtins.head rest}.packages.${system}.${joinSegments (builtins.tail rest)}
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+
if inputs != null then
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+
lib.attrByPath (
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[
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(builtins.head rest)
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"packages"
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system
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+
]
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+
++ (builtins.tail rest)
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) (throw error) inputs
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else
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+
throw "`inputs` was not passed to `mkNuScript` or is `null`, but a script references a dependency with the `inputs.` scope."
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else
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-
pkgs.${dep};
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+
lib.attrByPath segments (throw error) pkgs;
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externalDependencies =
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let