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Add aliases for autoloading root module attrs

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This commit is contained in:
Archit Gupta 2023-04-22 11:44:44 -07:00
parent f9967894bb
commit f4f7a8cd37
1 changed files with 35 additions and 20 deletions
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55
default.nix
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@ -7,9 +7,9 @@ let
inherit (builtins) intersectAttrs isPath readDir;
inherit (localInputs.nixpkgs.lib) attrNames attrVals attrValues
callPackageWith composeManyExtensions concat concatStringsSep filter
filterAttrs foldAttrs foldl functionArgs genAttrs hasSuffix isFunction
isList isString listToAttrs mapAttrs mapAttrsToList mapAttrs' mergeAttrs
nameValuePair optional optionalAttrs parseDrvName pathExists pipe
filterAttrs findFirst foldAttrs foldl functionArgs genAttrs hasSuffix
isFunction isList isString listToAttrs mapAttrs mapAttrsToList mapAttrs'
mergeAttrs nameValuePair optional optionalAttrs parseDrvName pathExists pipe
recursiveUpdate removePrefix removeSuffix zipAttrsWith;
/* Attributes in flakelite's lib output.
@ -74,20 +74,23 @@ let
(p: import (path + (if pathExists
(path + "/_${p}.nix") then "/_${p}.nix" else "/${p}.nix")));
/* Try to load an attr from a directory. If a nix file by that name exits,
/* Try to load a name from a directory. If a nix file by that name exits,
import it. If an importable directory with that name exists, import it.
Else, if a non-importable directory with that name exists, load the nix
files in that dir as an attrset. Returns null if the attr could not be
loaded.
files in that dir as an attrset. Returns null if the name could not be
loaded. If name is a list, tries all names in that list.
*/
autoImport = dir: attr:
if pathExists (dir + "/${attr}.nix")
then import (dir + "/${attr}.nix")
else if pathExists (dir + "/${attr}/default.nix")
then import (dir + "/${attr}")
else if pathExists (dir + "/${attr}")
then importDir (dir + "/${attr}")
else null;
autoImport = dir: name:
if isList name
then findFirst (x: x != null) null (map (autoImport dir) name)
else
if pathExists (dir + "/${name}.nix")
then import (dir + "/${name}.nix")
else if pathExists (dir + "/${name}/default.nix")
then import (dir + "/${name}")
else if pathExists (dir + "/${name}")
then importDir (dir + "/${name}")
else null;
/* List of attrs that can be provided by a module.
*/
@ -128,10 +131,21 @@ let
"nixDir"
];
/* Generate an attrset by importing attrs from dir. Filters null values.
/* Alternative names for autoloading root attrs.
*/
autoImportAttrs = dir: attrs:
filterAttrs (_: v: v != null) (genAttrs attrs (autoImport dir));
attrAliases = {
"nixosConfigurations" = [ "nixos" ];
"homeConfigurations" = [ "home" ];
# Lets `nix-shell` shell.nix be used automatically if no ./nix dir.
"devShell" = [ "shell" ];
};
/* Generate an attrset by importing attrs from dir. Filters null values.
Alternative names from aliases are used.
*/
autoImportAttrs = dir: attrs: aliases:
filterAttrs (_: v: v != null) (genAttrs attrs
(attr: autoImport dir ([ attr ] ++ aliases.${attr} or [ ])));
/* Makes the parameter callable, if it isn't. This allows values that are not
always functions to be applied to parameters.
@ -353,9 +367,10 @@ let
# Root module with autoloads, normalization, and additional attrs.
root' =
let
resolvedRoot = applyNonSysArgs root;
nixDir = resolvedRoot.nixDir or (src + /nix);
fullRoot = (autoImportAttrs nixDir rootAttrs) // resolvedRoot;
appliedRoot = applyNonSysArgs root;
nixDir = appliedRoot.nixDir or (src + /nix);
fullRoot = (autoImportAttrs nixDir rootAttrs attrAliases)
// appliedRoot;
in
normalizeModule fullRoot // {
modules = fullRoot.modules or