mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-12-18 03:34:58 +00:00
44 lines
1.6 KiB
Nix
44 lines
1.6 KiB
Nix
/* Impure default args for `pkgs/top-level/default.nix`. See that file
|
|
for the meaning of each argument. */
|
|
|
|
{ # Fallback: Assume we are building packages for the current (host, in GNU
|
|
# Autotools parlance) system.
|
|
system ? builtins.currentSystem
|
|
|
|
, # Fallback: The contents of the configuration file found at $NIXPKGS_CONFIG or
|
|
# $HOME/.nixpkgs/config.nix.
|
|
config ? let
|
|
inherit (builtins) getEnv pathExists;
|
|
|
|
configFile = getEnv "NIXPKGS_CONFIG";
|
|
homeDir = getEnv "HOME";
|
|
configFile2 = homeDir + "/.nixpkgs/config.nix";
|
|
in
|
|
if configFile != "" && pathExists configFile then import configFile
|
|
else if homeDir != "" && pathExists configFile2 then import configFile2
|
|
else {}
|
|
|
|
, # Overlays are used to extend Nixpkgs collection with additional
|
|
# collections of packages. These collection of packages are part of the
|
|
# fix-point made by Nixpkgs.
|
|
overlays ? let
|
|
inherit (builtins) getEnv pathExists readDir attrNames map sort
|
|
lessThan;
|
|
dirEnv = getEnv "NIXPKGS_OVERLAYS";
|
|
dirHome = (getEnv "HOME") + "/.nixpkgs/overlays";
|
|
dirCheck = dir: dir != "" && pathExists (dir + "/.");
|
|
overlays = dir:
|
|
let content = readDir dir; in
|
|
map (n: import "${dir}/${n}") (sort lessThan (attrNames content));
|
|
in
|
|
if dirEnv != "" then
|
|
if dirCheck dirEnv then overlays dirEnv
|
|
else throw "The environment variable NIXPKGS_OVERLAYS does not name a valid directory."
|
|
else if dirCheck dirHome then overlays dirHome
|
|
else []
|
|
|
|
, ...
|
|
} @ args:
|
|
|
|
import ./. (args // { inherit system config overlays; })
|