100 lines
2.6 KiB
Org Mode
100 lines
2.6 KiB
Org Mode
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#+title: Plymouth
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#+setupfile: ../headers
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* Plymouth
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Plymouth is a utility which shows an animation at startup or when
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powering off a device, instead of showing only terminal things. My
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Plymouth settings are set in the =nixos.plymouth= module.
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#+begin_src nix :tangle yes
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{
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flake.modules.nixos.plymouth = {pkgs, ...}: {
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boot = {
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<<plymouth>>
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<<kernel-parameters>>
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<<quiet-console>>
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<<no-menu>>
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};
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};
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}
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#+end_src
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** Quieting Down the Console
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First, I need to set a few kernel parameters to make displaying
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Plymouth possible:
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#+name: kernel-parameters-list
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- =quiet= :: silences the logs in the terminal
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- =splash= :: show the splash screen (in our case, Plymouth)
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- =boot.shell_on_fail= :: sets =allowShell=1=, which permits the =fail()=
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handler to drop an interactive rescue shell if stage-1 boot fails
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- =udev.log_level=3= :: sets udev’s log level to =err=
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- =rd.systemd.show_status=auto= :: suppress systemd status messages in
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initrd unless boot is significantly delayed
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#+name: kernel-params
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#+begin_src emacs-lisp :var params=kernel-parameters-list :cache yes
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(mapconcat (lambda (param)
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(format "\"%s\""
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(s-chop-suffix "=" (s-chop-prefix "=" (car (s-split " ::" param))))))
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params
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"\n")
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#+end_src
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#+RESULTS[7a824c095f2934792b4a3749e56091a8603aaacf]: kernel-params
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: "quiet"
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: "splash"
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: "boot.shell_on_fail"
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: "udev.log_level=3"
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: "rd.systemd.show_status=auto"
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This translates into:
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#+name: kernel-parameters
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#+begin_src nix :noweb yes
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kernelParams = [
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<<kernel-params()>>
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];
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#+end_src
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To further decrease the verbosity of the booting screen, we can
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deactivate initrd’s verbosity and lower the console’s log level to
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=err=.
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#+name: quiet-console
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#+begin_src nix
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consoleLogLevel = 3;
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initrd.verbose = false;
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#+end_src
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And we’ll show Plymouth immediately, skipping the bootloader’s menu.
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We can hold a key to force displaying the menu, though.
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#+name: no-menu
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#+begin_src nix
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loader.timeout = 0;
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#+end_src
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** Configuring Plymouth
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Now, we can configure Plymouth proper.
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#+name: plymouth
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#+begin_src nix
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plymouth = {
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enable = true;
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<<plymouth-theme>>
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};
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#+end_src
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The only significant configuration I want to change in Plymouth is the
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animation. I really like how it looks. You can find a preview of it in
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[[https://github.com/adi1090x/plymouth-themes#previews][adi1090x's repository]], under the first pack. For this, I need to set
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a theme package and the theme name.
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#+name: plymouth-theme
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#+begin_src nix
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theme = "circle_hud";
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themePackages = with pkgs; [
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(adi1090x-plymouth-themes.override {
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selected_themes = ["circle_hud"];
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})
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];
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#+end_src
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And we’re done!
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