Move to a profile-based configuration where common

This patch makes it so common configuration is now located in shared/
and each host basically just becomes a bunch of import statements.

The exception here is host-specific configuration like the `*.linus.onl`
that live inside `hosts/ahmed/`.

Specifically I have:

- moved common configuration `shared/{nixos,home-manager,nix-darwin}`.
- moved `hosts/common.nix` to `shared/nixos/common-{nix,shell}-settings.nix`.
- split `hosts/muhammed/{dev-utils,neovim}` into per-language
  configuration.

This patch was done in preparation for the arrival of a new host, which
will need to share a lot of configuration with Muhammed.

1 files changed, 14 insertions, 0 deletions

diff --git a/shared/home-manager/nix/default.nix b/shared/home-manager/nix/default.nix
new file mode 100644
index 0000000..dcdff2a
--- /dev/null
+++ b/shared/home-manager/nix/default.nix
@@ -0,0 +1,14 @@
+# This module configures development tools for Nix.
+{pkgs, ...}: {
+  programs.neovim = {
+    plugins = with pkgs.vimPlugins; [
+      vim-nix
+    ];
+
+    extraLuaConfig = ''
+      require("lspconfig")["nixd"].setup({
+        cmd = { "${pkgs.nixd}/bin/nixd" },
+      })
+    '';
+  };
+}