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, 22 insertions, 0 deletions

diff --git a/shared/home-manager/C/default.nix b/shared/home-manager/C/default.nix
new file mode 100644
index 0000000..b4d42a5
--- /dev/null
+++ b/shared/home-manager/C/default.nix
@@ -0,0 +1,22 @@
+# This module configures development tools for C.
+{pkgs, ...}: {
+  home.packages = with pkgs; [
+    clang
+    cscript
+  ];
+
+  programs.neovim.extraLuaConfig = ''
+    require("lspconfig")["clangd"].setup({
+      cmd = { "${pkgs.clang-tools}/bin/clangd", "--background-index", "--clang-tidy" },
+      on_attach = function(_, bufnr)
+        vim.keymap.set("n", "<leader>s", function()
+          vim.cmd [[ClangdSwitchSourceHeader]]
+        end, {
+          noremap=true,
+          silent=true,
+          buffer=bufnr,
+        })
+      end,
+    })
+  '';
+}