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, 44 insertions, 0 deletions

diff --git a/shared/nixos/common-shell-settings/default.nix b/shared/nixos/common-shell-settings/default.nix
new file mode 100644
index 0000000..ec71861
--- /dev/null
+++ b/shared/nixos/common-shell-settings/default.nix
@@ -0,0 +1,44 @@
+# This module sets options to ensure a consistent Baseline Shell Experince™
+# across the entire fleet. This includes e.g. common utilities and aliases.
+#
+# NOTE: Even though this lives under `shared/nixos` the configuration in here
+# should also be compatible with nix-darwin!!
+{pkgs, ...}: {
+  # Set ZSH as the shell.
+  # https://nixos.wiki/wiki/Command_Shell#Changing_default_shelltrue
+  programs.zsh.enable = true;
+  environment.shells = [pkgs.zsh];
+
+  # Very basic system administration tools.
+  environment.systemPackages = with pkgs; [
+    curl
+    jq
+    moreutils
+    neovim
+    tree
+  ];
+
+  # Aliases that are burned into my muscle memory.
+  environment.shellAliases = {
+    "mv" = "mv -i";
+    "rm" = "rm -i";
+    "cp" = "cp -i";
+    "ls" = "ls -F -G -A --color=auto";
+    "grep" = "grep --color=auto";
+    "file" = "file --no-dereference";
+    "tree" = "tree --dirsfirst --gitignore";
+
+    # See: https://github.com/NixOS/nix/issues/5858
+    "nix" = "nix --print-build-logs";
+
+    ".." = "cd ../";
+    "..." = "cd ../../";
+    "...." = "cd ../../../";
+    "....." = "cd ../../../../";
+    "......" = "cd ../../../../../";
+    "......." = "cd ../../../../../../";
+    "........" = "cd ../../../../../../../";
+    "........." = "cd ../../../../../../../../";
+    ".........." = "cd ../../../../../../../../../";
+  };
+}