71 lines
2.9 KiB
Nix
71 lines
2.9 KiB
Nix
|
# Modified copy of github:NixOS/nixpkgs pkgs/top-level/impure.nix
|
|||
|
|
# as of commit 242522b8fed8d63f262fd6e747ba1e4372b59a8e
|
|||
|
|
|
|||
|
|
# I wish I could just import from nixpkgs and set different path to entry point.
|
|||
|
|
|
|||
|
|
let
|
|||
|
|
homeDir = builtins.getEnv "HOME";
|
|||
|
|
|
|||
|
|
# Return ‘x’ if it evaluates, or ‘def’ if it throws an exception.
|
|||
|
|
try = x: def: let res = builtins.tryEval x; in if res.success then res.value else def;
|
|||
|
|
in
|
|||
|
|
|
|||
|
|
{ localSystem ? { system = args.system or builtins.currentSystem; }
|
|||
|
|
, system ? localSystem.system
|
|||
|
|
, crossSystem ? localSystem
|
|||
|
|
, config ? let
|
|||
|
|
configFile = builtins.getEnv "NIXPKGS_CONFIG";
|
|||
|
|
configFile2 = homeDir + "/.config/nixpkgs/config.nix";
|
|||
|
|
configFile3 = homeDir + "/.nixpkgs/config.nix"; # obsolete
|
|||
|
|
in
|
|||
|
|
if configFile != "" && builtins.pathExists configFile then import configFile
|
|||
|
|
else if homeDir != "" && builtins.pathExists configFile2 then import configFile2
|
|||
|
|
else if homeDir != "" && builtins.pathExists configFile3 then import configFile3
|
|||
|
|
else {}
|
|||
|
|
, overlays ? let
|
|||
|
|
isDir = path: builtins.pathExists (path + "/.");
|
|||
|
|
pathOverlays = try (toString <nixpkgs-overlays>) "";
|
|||
|
|
homeOverlaysFile = homeDir + "/.config/nixpkgs/overlays.nix";
|
|||
|
|
homeOverlaysDir = homeDir + "/.config/nixpkgs/overlays";
|
|||
|
|
overlays = path:
|
|||
|
|
# check if the path is a directory or a file
|
|||
|
|
if isDir path then
|
|||
|
|
# it's a directory, so the set of overlays from the directory, ordered lexicographically
|
|||
|
|
let content = builtins.readDir path; in
|
|||
|
|
map (n: import (path + ("/" + n)))
|
|||
|
|
(builtins.filter
|
|||
|
|
(n:
|
|||
|
|
(builtins.match ".*\\.nix" n != null &&
|
|||
|
|
# ignore Emacs lock files (.#foo.nix)
|
|||
|
|
builtins.match "\\.#.*" n == null) ||
|
|||
|
|
builtins.pathExists (path + ("/" + n + "/default.nix")))
|
|||
|
|
(builtins.attrNames content))
|
|||
|
|
else
|
|||
|
|
# it's a file, so the result is the contents of the file itself
|
|||
|
|
import path;
|
|||
|
|
in
|
|||
|
|
if pathOverlays != "" && builtins.pathExists pathOverlays then overlays pathOverlays
|
|||
|
|
else if builtins.pathExists homeOverlaysFile && builtins.pathExists homeOverlaysDir then
|
|||
|
|
throw ''
|
|||
|
|
Nixpkgs overlays can be specified with ${homeOverlaysFile} or ${homeOverlaysDir}, but not both.
|
|||
|
|
Please remove one of them and try again.
|
|||
|
|
''
|
|||
|
|
else if builtins.pathExists homeOverlaysFile then
|
|||
|
|
if isDir homeOverlaysFile then
|
|||
|
|
throw (homeOverlaysFile + " should be a file")
|
|||
|
|
else overlays homeOverlaysFile
|
|||
|
|
else if builtins.pathExists homeOverlaysDir then
|
|||
|
|
if !(isDir homeOverlaysDir) then
|
|||
|
|
throw (homeOverlaysDir + " should be a directory")
|
|||
|
|
else overlays homeOverlaysDir
|
|||
|
|
else []
|
|||
|
|
, crossOverlays ? []
|
|||
|
|
, ...
|
|||
|
|
} @ args:
|
|||
|
|
|
|||
|
|
# Assertion checked in called nixpkgs upstream, thus removed here
|
|||
|
|
|
|||
|
|
import ./. (builtins.removeAttrs args [ "system" ] // {
|
|||
|
|
inherit config overlays localSystem;
|
|||
|
|
})
|