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Generate flake.nix from module options. Discussions: https://oeiuwq.zulipchat.com/join/nqp26cd4kngon6mo3ncgnuap/
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dendritic
nix
inputs
1{
2 pkgs ? import <nixpkgs> { },
3 modules ? [ ],
4 outdir ? ".",
5 inputs ? null,
6 outputs ? null,
7 do-not-edit ? null,
8 import-tree ? (
9 pkgs.fetchFromGitHub {
10 owner = "vic";
11 repo = "import-tree";
12 rev = "c968d3b54d12cf5d9c13f16f7c545a06c9d1fde6";
13 hash = "sha256-oYO4poyw0Sb/db2PigqugMlDwsvwLg6CSpFrMUWxA3Q=";
14 }
15 ),
16 ...
17}:
18let
19 inherit (pkgs) lib;
20
21 tree = (import import-tree) modules;
22
23 attrsOpt = lib.mkOption {
24 default = { };
25 type = lib.types.submodule { freeformType = lib.types.lazyAttrsOf lib.types.unspecified; };
26 };
27
28 module = {
29 imports = [
30 tree
31 ./../default.nix
32 ./../options
33 ./../npins
34 ./../unflake
35 ./../nixlock
36 ./../write-inputs.nix
37 ./../write-flake.nix
38 ./../write-lock.nix
39 ./../flake-options.nix
40 (lib.optionalAttrs (inputs != null) { flake-file.inputs = inputs; })
41 (lib.optionalAttrs (outputs != null) { flake-file.outputs = strOrFile outputs; })
42 (lib.optionalAttrs (do-not-edit != null) { flake-file.do-not-edit = strOrFile do-not-edit; })
43
44 bootstrap-app
45 ];
46 config.flake-file.intoPath = outdir;
47 options = {
48 lib = attrsOpt;
49 templates = attrsOpt;
50 flakeModules = attrsOpt;
51 };
52 };
53
54 strOrFile = str: if builtins.isPath str then builtins.readFile str else str;
55
56 bootstrap-app = {
57 flake-file.apps.bootstrap =
58 pkgs:
59 let
60 inputs = ''{ flake-file.url = "github:vic/flake-file"; }'';
61 notice = pkgs.writeText "notice" ''
62 # DO-NOT-EDIT. Generated by github:vic/flake-file from flake-file.nix. Regen with:
63 # nix-shell https://github.com/vic/flake-file/archive/main.zip -A flake-file.sh --run bootstrap
64 '';
65 in
66 pkgs.writeShellApplication {
67 name = "bootstrap";
68 text = ''
69 if ! test -f flake-file.nix; then
70 cp flake.nix flake-file.nix
71 fi
72 nix-shell ${../..} -A flake-file.sh --run write-flake \
73 --arg modules ./flake-file.nix \
74 --arg do-not-edit ${notice} \
75 --argstr outputs flake-module \
76 --arg inputs '${inputs}'
77 '';
78 };
79 };
80
81 evaled = lib.evalModules { modules = [ module ]; };
82
83in
84evaled.config