docs(dankgreeter): document NixOS auto-login#103
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The nixpkgs dms-greeter module supports declarative auto-login via
services.displayManager.autoLogin.{enable,user} and
services.displayManager.defaultSession, but the NixOS installation page
didn't mention it. Add an Auto-login section covering the required
options and noting that the session command is resolved declaratively
(so it survives rebuilds and garbage collection), which is the durable
alternative to the greeter's remembered-session auto-login on NixOS.
Refs AvengeMedia/DankMaterialShell#2591
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What
Adds an Auto-login section to the DankGreeter NixOS (nixpkgs module) installation page, covering:
services.displayManager.autoLogin.enable/.userservices.displayManager.defaultSession(and the requirement that it — orsessionPackages— be set)nix-collect-garbageApplied to both the current page (
docs/dankgreeter/nixos.mdx) and the latest versioned copy (versioned_docs/version-1.4/dankgreeter/nixos.mdx).Why
The nixpkgs
dms-greetermodule already supports declarative auto-login (it renders greetd'sinitial_sessionfrom these options), but the docs didn't mention it anywhere, so it wasn't discoverable. This is also the durable alternative to the greeter's remembered-session auto-login on NixOS, which can bake an absolute/nix/storepath that goes stale on rebuild and breaks after garbage collection.Refs AvengeMedia/DankMaterialShell#2591
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