51 lines
1.4 KiB
Nix
51 lines
1.4 KiB
Nix
{ self, lib, ... }:
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let
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inherit (builtins) readDir pathExists;
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inherit (lib) hasPrefix hasSuffix nameValuePair removeSuffix;
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inherit (self.attrs) mapFilterAttrs;
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implOptionalRecursion = recurse:
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let
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recurseStep =
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if recurse
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then (n: path: fn: nameValuePair n (impl path fn))
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else (_: _: _: nameValuePair "" null);
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impl = dir: fn:
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mapFilterAttrs
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(n: _: n != "" && !(hasPrefix "_" n))
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(n: v:
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let
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path = "${toString dir}/${n}";
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in
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if v == "directory"
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then
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if pathExists "${path}/default.nix"
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then nameValuePair n (fn path)
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else recurseStep n path fn
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else if v == "regular" && n != "default.nix" && hasSuffix ".nix" n
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then nameValuePair (removeSuffix ".nix" n) (fn path)
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else nameValuePair "" null)
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(readDir dir);
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in
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impl;
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in
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{
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# Find all nix modules in a directory, discard any prefixed with "_",
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# map a function to each resulting path, and generate an attribute set
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# to associate module name to resulting value.
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#
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# mapModules ::
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# path
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# (path -> any)
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# attrs
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mapModules = implOptionalRecursion false;
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# Recursive version of mapModules.
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#
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# mapModulesRec ::
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# path
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# (path -> any)
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# attrs
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mapModulesRec = implOptionalRecursion true;
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}
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