mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-11-29 18:33:00 +00:00
1d160e9cc1
The revCount attribute is only present when the flake is an actual git repo and not when using a flake reference with an input scheme for a git forge that downloads tarballs instead (like github: or sourcehut:). Because of this, the hash of the nixos config changes depending on whether the config was built from a local git clone or from a flake ref using one of those input schemes. This leads to confusion (I lost quite some time figuring out what happened here) and unnecessary rebuilds. To my knowledge, there is no immediate benefit to including revCount in the flake registry entry.
96 lines
2.5 KiB
Nix
96 lines
2.5 KiB
Nix
/*
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Manages the flake registry.
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See also
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- ./nix.nix
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- ./nix-channel.nix
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*/
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{ config, lib, ... }:
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let
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inherit (lib)
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filterAttrs
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literalExpression
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mapAttrsToList
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mkDefault
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mkIf
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mkOption
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types
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;
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cfg = config.nix;
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in
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{
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options = {
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nix = {
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registry = mkOption {
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type = types.attrsOf (types.submodule (
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let
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referenceAttrs = with types; attrsOf (oneOf [
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str
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int
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bool
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path
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package
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]);
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in
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{ config, name, ... }:
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{
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options = {
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from = mkOption {
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type = referenceAttrs;
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example = { type = "indirect"; id = "nixpkgs"; };
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description = "The flake reference to be rewritten.";
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};
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to = mkOption {
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type = referenceAttrs;
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example = { type = "github"; owner = "my-org"; repo = "my-nixpkgs"; };
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description = "The flake reference {option}`from` is rewritten to.";
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};
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flake = mkOption {
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type = types.nullOr types.attrs;
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default = null;
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example = literalExpression "nixpkgs";
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description = ''
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The flake input {option}`from` is rewritten to.
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'';
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};
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exact = mkOption {
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type = types.bool;
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default = true;
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description = ''
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Whether the {option}`from` reference needs to match exactly. If set,
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a {option}`from` reference like `nixpkgs` does not
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match with a reference like `nixpkgs/nixos-20.03`.
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'';
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};
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};
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config = {
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from = mkDefault { type = "indirect"; id = name; };
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to = mkIf (config.flake != null) (mkDefault (
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{
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type = "path";
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path = config.flake.outPath;
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} // filterAttrs
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(n: _: n == "lastModified" || n == "rev" || n == "narHash")
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config.flake
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));
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};
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}
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));
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default = { };
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description = ''
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A system-wide flake registry.
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'';
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};
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};
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};
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config = mkIf cfg.enable {
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environment.etc."nix/registry.json".text = builtins.toJSON {
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version = 2;
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flakes = mapAttrsToList (n: v: { inherit (v) from to exact; }) cfg.registry;
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};
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};
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}
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