43 lines
1.2 KiB
Nix
43 lines
1.2 KiB
Nix
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{ pkgs, ... }:
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# `fs` contains utility functions for working with the filesystem.
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let
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inherit (builtins) attrNames hasAttr map readDir;
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inherit (pkgs.lib) filterAttrs;
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in
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{
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# Returns a list of all of the regular files in `dir`.
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files = dir:
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map (name: dir + "/${name}")
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(attrNames
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(filterAttrs (_: type: type == "regular") (readDir dir)));
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# Returns a list of all of the directories in `dir`.
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dirs = dir:
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map (name: dir + "/${name}")
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(attrNames
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(filterAttrs (_: type: type == "directory") (readDir dir)));
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# Returns a list of paths to all of the `name` files starting at `dir`.
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find = name: dir:
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if hasAttr name (readDir dir) then
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[ (dir + name) ] ++ concatMap findAllDefaultNix (dirs dir)
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else
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concatMap findAllDefaultNix (dirs dir);
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# Looks for `name` in `dir`; if it cannot find it, it checks the parent
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# directory.
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resolve = name: dir:
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if hasAttr name (readDir dir) then
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dir + "/${name}"
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else
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# This prevents the function from infinitely recursing and eventually
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# stack overflowing.
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if (dirOf dir) == dir then
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null
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else
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resolve name (dirOf dir);
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};
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}
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