dots/lib/default.nix

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# Some of these functions were taken from https://github.com/NixOS/nixpkgs/blob/master/lib/
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{ lib ? (import <nixpkgs> { }).lib }: rec {
hasSuffix = suffix: string:
let
lenSuffix = builtins.stringLength suffix;
lenString = builtins.stringLength string;
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in (lenString >= lenSuffix
&& (builtins.substring (lenString - lenSuffix) lenString string)
== suffix);
recurseDir = dir:
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let dirContents = builtins.readDir dir;
in (builtins.concatMap (dirItem:
let
itemType = builtins.getAttr dirItem dirContents;
itemPath = dir + "/${dirItem}";
in if itemType == "directory" then
(recurseDir itemPath)
else
[ itemPath ]) (builtins.attrNames dirContents));
recurseFilesInDir = dir: suffix:
(builtins.filter (file: hasSuffix "${suffix}" file) (recurseDir dir));
recurseFilesInDirs = dirs: suffix:
(builtins.concatMap (dir: (recurseFilesInDir dir "${suffix}")) dirs);
# Full credit to https://stackoverflow.com/questions/54504685/nix-function-to-merge-attributes-records-recursively-and-concatenate-arrays/54505212#54505212
recursiveMerge = attrList:
let
f = attrPath:
lib.zipAttrsWith (n: values:
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if lib.tail values == [ ] then
lib.head values
else if lib.all builtins.isList values then
lib.unique (lib.concatLists values)
else if lib.all builtins.isAttrs values then
f (attrPath ++ [ n ]) values
else
lib.last values);
in f [ ] attrList;
}