devos/lib
David Arnold 15cf15b3ed
iso: filter out al profiles (except core)
IN order to avoid random startup of systemd services, filter out all
profiles, except for core and user profiles.

This works becasue of a fundamental devos contract, that modules
only define configuration, but don't implement them and profiles
only implement confguration but don't define them. So only ever an
activated profile is expected to effectively start up a systemd service.

closes: #194
2021-03-18 23:46:47 -05:00
..
devos iso: filter out al profiles (except core) 2021-03-18 23:46:47 -05:00
attrs.nix treewide cleanups and refactoring for initial tests (#157) 2021-03-14 07:10:51 +00:00
default.nix lib/devos: bake devos repo into live cd (#168) 2021-03-16 19:50:38 +00:00
lists.nix treewide cleanups and refactoring for initial tests (#157) 2021-03-14 07:10:51 +00:00
README.md lib: add usage docs 2021-03-01 14:37:43 -05:00
strings.nix lib: add rgxToString function 2021-03-14 21:40:49 -06:00

Lib

The lib directory mirrors the upstream concepts of nixpkgs:./lib, nixpkgs:./nixos/lib and nixpkgs:./pkgs/pkgs-lib, but also occasionally nixpkgs:./pkgs/build-support.

It comes with functions necesary to declutter devos itself, but you are welcome to extend it to your needs.

For example:

  • you want to add a library function that depends on some packages and use it throughout your devos environment: place it into ./lib as if you would place it into nixpkgs:./pkgs/pkgs-lib.

  • you want to add library functions that don't depend on pkgs: place them into ./lib as if you would place them into nixpkgs:./lib.

  • need to try out a newish custom build support: place it here before upstreaming into nixpkgs:./pkgs/build-support.

  • you want to reutilize certain module configuration functions or helpers: place them into ./lib as if you would place them into nixpkgs:./nixos/lib.

Once your library grows, we recoomend you start organizing them into subfolders analogous nixpkgs:

nixpkgs devos
./lib ./lib
./pkgs/pkgs-lib ./lib/pkgs-lib
./nixos/lib ./lib/nixos-lib
./pkgs/build-support ./lib/pkgs-build

Example

lib/nixos-lib/mkCustomI3BindSym/default.nix:

{ pkgs, writers, ... }:
{ name, cmd, workspace, baseKey }:
let
  isWorkspaceEmpty = writers.writePython3 "is-workspace-empty" {
    libraries = [ pkgs.python3Packages.i3ipc ];
  } (builtins.readFile ./is-workspace-empty.py);

  ws = builtins.toString workspace;
in
''

  # ${name}
  #bindsym ${baseKey}+${ws} workspace ${ws}; exec ${cmd}
  bindsym ${baseKey}+${ws} workspace ${ws}; exec bash -c "${isWorkspaceEmpty} && ${cmd}"
''

lib/nixos-lib/mkCustomI3BindSym/is-workspace-empty.py:

# returns 0/1 if current workspace is empty/non-empty

import i3ipc

i3 = i3ipc.Connection()
tree = i3.get_tree()


def current_workspace():
    return tree.find_focused().workspace()


if current_workspace().leaves():
    print("Error current workspace is not empty")
    exit(1)
exit(0)

lib/default.nix:

{ nixos, pkgs, ... }:
# ...
{
  # ...
  mkCustomI3BindSym = pkgs.callPackage ./nixos-lib/mkCustomI3BindSym { };
}