lib: Init

This commit is contained in:
Tom Hubrecht 2023-05-22 15:05:20 +02:00
parent 3e052803ca
commit b3d2cd6071
2 changed files with 59 additions and 0 deletions

20
lib/default.nix Normal file
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{ lib, ... }:
let
trivial = import ./trivial.nix;
in
trivial // (with trivial; rec {
mkImport = root: file:
let path = mkRel root file; in
path + (lib.optionalString (!lib.pathIsDirectory path) ".nix");
mkImports = root: builtins.map (mkImport root);
getKeys = name: builtins.filter (k: k != "") (lib.splitString "\n" (builtins.readFile (../keys + "/${name}.keys")));
/* List version of getKeys */
getAllKeys = names: builtins.concatLists (builtins.map getKeys names);
getKeyFiles = builtins.map (compose (n: "${n}.keys") (mkRel ../keys));
})

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lib/trivial.nix Normal file
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rec {
/* Fuses a list of attribute sets into a single attribute set.
Example:
x = [ { a = 1; } { b = 2; } ]
fuseAttrs x
=> { a = 1; b = 2; }
*/
fuseAttrs = builtins.foldl' (attrs: x: attrs // x) { };
/* Maps then fuses a list of attribute sets into a single attribute set.
Example:
x = [ "a" "b" ]
mapFuse (c: { ${c} = 42; }) x
=> { a = 42; b = 42; }
*/
mapFuse = f: attrsList: fuseAttrs (builtins.map f attrsList);
/* Equivalent of lib.singleton but for an attribute set.
Example:
singleAttr "a" 1
=> { a = 1; }
*/
singleAttr = name: value: { ${name} = value; };
mapSingleFuse = f: mapFuse (x: singleAttr x (f x));
/* Creates a relative path as a string
Example:
mkRel /home/test/ "file.txt"
=> "/home/test/file.txt"
*/
mkRel = path: file: builtins.toString (path + "/${file}");
compose = f: g: (x: g (f x));
}