os/lib
David Arnold 007447652b
iso: add back complete host profile to the nix store
This ensures that all builds of activated profiles are included into
the iso cache and don't require rebuilding within the live installer
environment.
2021-03-18 23:46:47 -05:00
..
devos iso: add back complete host profile to the nix store 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 { };
}