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refactor: improve flake.nix code

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This commit is contained in:
Kiana Sheibani 2025-11-26 16:53:32 -05:00
parent cd9c13f2e2
commit 1e7ccb7acf
Signed by: toki
GPG key ID: 6CB106C25E86A9F7
1 changed files with 28 additions and 24 deletions
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52
flake.nix
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@ -2,41 +2,45 @@
description = "Hello World flake templates for various languages and build systems";
outputs = { self, ... }:
let
with builtins; let
concatMapAttrs = func: attr:
foldl' (x: y: x // y) {} (map func attr);
# Template Aliases
# Used to pick default template for each language
aliases = {
bash = "bash_script_nixpkgs";
fish = "fish_script_nixpkgs";
python = "python_pyproject_nixpkgs_basic";
};
# Get all project directories
# Get all subdirectories of the given path
# Returns [str]
subdirs = dir:
let sub = __readDir dir;
in builtins.filter
(d: sub.${d} == "directory")
(builtins.attrNames sub);
concatMapAttrs = func: attr:
builtins.foldl' (x: y: x // y) {}
(builtins.map func attr);
let subd = readDir dir;
in filter (d: subd.${d} == "directory") (attrNames subd);
# Get all proper recursive subdirectories with flakes in them
# Returns [[str]] (list of subdirectory sequences, for processing)
flakeSubdirs = dir:
builtins.concatMap (sub:
if builtins.pathExists /${dir}/${sub}/flake.nix then [ [ sub ] ] else
builtins.map (l: [ sub ] ++ l) (flakeSubdirs /${dir}/${sub}))
concatMap (subd:
if pathExists /${dir}/${subd}/flake.nix then [ [ subd ] ] else
map (l: [ subd ] ++ l) (flakeSubdirs /${dir}/${subd}))
(subdirs dir);
generateDesc = subds:
"${head subds} template - ${concatStringsSep ", " (tail subds)}";
in {
templates = concatMapAttrs (path: {
${builtins.concatStringsSep "_" path} = {
description = "${builtins.head path} template - ${builtins.concatStringsSep
", " (builtins.tail path)}";
path = builtins.filterSource
(path: type: builtins.baseNameOf path != "flake.lock")
(builtins.foldl' (dir: sub: /${dir}/${sub}) ./. path);
templates = concatMapAttrs (subds: {
${concatStringsSep "_" subds} = {
description = generateDesc subds;
path = filterSource
(p: _: baseNameOf p != "flake.lock")
(foldl' (dir: subd: /${dir}/${subd}) ./. subds);
};
}) (flakeSubdirs ./.) // builtins.mapAttrs (lang: def:
self.templates.${def} // {
description = "${lang} template";
}) aliases;
}) (flakeSubdirs ./.) // mapAttrs (from: to:
self.templates.${to} // {
description = generateDesc (filter (p: p != []) (split "_" to));
}) aliases;
};
}