lheckemann

const fs = require("fs")

try {
    fs.createReadStream("/tmp")
} catch (e) {
    console.error("hello")
    console.error(e)
}

lheckemann

Expression for a buildEnv-based declarative user environment

This is one way of managing your user profile declaratively.

Alternatives include:

• an attrset-based nix-env-based environment, installed using nix-env -ir rather than nix-env --set. LnL has an overlay which shows a way of doing this.
• home-manager, which provides NixOS-like config for your $HOME

Note that this is incompatible with regular imperative use of nix-env, e.g. nix-env -iA nixpkgs.hello. It has the advantage of allowing the installation of multiple outputs of the same package much better than nix-env's builtin profile builder does.

lheckemann

{
  systemd.services.caps-escape-console = {
    wantedBy = ["multi-user.target"];
    after = ["systemd-vconsole-setup.service"];
    path = [ pkgs.kbd ];
    script = ''
      echo 'keycode 58 = Escape' | loadkeys
    '';
  };
}

lheckemann

/*
A set of applications which is lightweight in terms of build closure but makes
using a system a lot more pleasant.
*/
{ pkgs, ... }:
{
  environment.systemPackages = with pkgs; [
    ((vimUtils.makeCustomizable vim).customize {
      name = "vim";
      vimrcConfig = {

lheckemann

#!/usr/bin/env nix-shell
#! nix-shell -i bash -E "with import <nixpkgs> {}; mkShell {buildInputs = [pkgconfig]; shellHook = ''echo hello'';}"
echo world

lheckemann

nix-build -E 'with import <nixpkgs> {}; rxvt_unicode.overrideAttrs (o: {patches = [(builtins.fetchurl https://gist.githubusercontent.com/lheckemann/a613f7eaf19b5fdd8b490ff7019de134/raw/bae5dccf7c5fdf20bec44ad337f0f20ebcd91495/urxvt-nice-cursors.patch)] ++ o.patches or []; buildInputs = [xorg.libXcursor] ++ o.buildInputs or []; nativeBuildInputs = [autoreconfHook] ++ o.nativeBuildInputs or [];})'

lheckemann

  pool: thirtythree
 state: ONLINE
  scan: scrub repaired 0B in 0h1m with 0 errors on Fri Mar 15 19:43:58 2019
config:

        NAME         STATE     READ WRITE CKSUM
        thirtythree  ONLINE       0     0     0
          mirror-0   ONLINE       0     0     0
            sdc      ONLINE       0     0     0
            sdd      ONLINE       0     0     0

lheckemann

# 6min kernel, 7m30 zfs, on community box
{ pkgs ? import <nixpkgs> {}}: with pkgs;
linuxPackagesFor ((buildLinux rec {
  src = fetchFromGitHub {
    owner = "friendlyarm";
    repo = "kernel-rockchip";
    rev = "decbad503ca983f939baca6c19a79117b11f5bd6";
    sha256 = "1mwykah9yr68gscrc8lqi3jay4553yq9cs86m5b21wizm5ikhpfn";
  };
  version = "4.4.154";

lheckemann

{ pkgs ? import <nixpkgs> {} }: with pkgs;
let linuxPackages = callPackage /etc/nixos/thirtythree/kernel.nix {}; in
rec {
  linux = linuxPackages.kernel;
  initrd = (makeInitrd {
    contents = [
      { object = init; symlink = "/sbin/init"; }
      { object = init; symlink = "/init"; }
      { object = "${modulesClosure}/lib"; symlink = "/lib"; }
    ];

lheckemann

[root@thirtythree:~]# zfs inherit mountpoint thirtythree/nixos/root
umount: /: target is busy.
cannot unmount '/': umount failed

[root@thirtythree:~]# zfs list thirtythree/nixos/root
NAME                     USED  AVAIL  REFER  MOUNTPOINT
thirtythree/nixos/root  3.14G  1.99T  3.14G  /