ref(home/shell): make it easier to share common things between shells

I'm considering trying again fish, and there are a number of things that
should be common between zsh and fish (aliases, environment variables,
...).

Instead of duplicating these settings multiple time, I'm consolidating
the shell configurations under `home/shell`, and I can set the shell I
want to use with `my.home.shell.name`.

The first step is to move the modules for fish and zsh under
`home/shell`, add an interface to pick which one I want to use, and
modify the `host/home.nix` configuration to keep using zsh with the new
interface.

Change-Id: Idb66b1a6fcc11a6eeaf5fd2d32dd3698d2d85bdf
Reviewed-on: https://cl.fcuny.net/c/world/+/455
Tested-by: CI
Reviewed-by: Franck Cuny <franck@fcuny.net>

7 files changed, 2 insertions, 6 deletions

diff --git a/home/zsh/completion-style.zsh b/home/shell/zsh/completion-style.zsh
index 32bd6f4..32bd6f4 100644
--- a/home/zsh/completion-style.zsh
+++ b/home/shell/zsh/completion-style.zsh
diff --git a/home/zsh/default.nix b/home/shell/zsh/default.nix
index 21dbedd..14ddd6c 100644
--- a/home/zsh/default.nix
+++ b/home/shell/zsh/default.nix
@@ -1,12 +1,8 @@
 { config, pkgs, lib, ... }:
-let cfg = config.my.home.zsh;
+let cfg = config.my.home.shell;
 in
 {
-  options.my.home.zsh = with lib; {
-    enable = mkEnableOption "zsh configuration";
-  };
-
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf (cfg.name == "zsh") {
     home.packages = with pkgs; [ zsh-completions ];
 
     programs.zsh = {
diff --git a/home/zsh/gerrit.zsh b/home/shell/zsh/gerrit.zsh
index 9766b2f..9766b2f 100644
--- a/home/zsh/gerrit.zsh
+++ b/home/shell/zsh/gerrit.zsh
diff --git a/home/zsh/options.zsh b/home/shell/zsh/options.zsh
index 6d39bc1..6d39bc1 100644
--- a/home/zsh/options.zsh
+++ b/home/shell/zsh/options.zsh
diff --git a/home/zsh/prompt.zsh b/home/shell/zsh/prompt.zsh
index 1c21d4b..1c21d4b 100644
--- a/home/zsh/prompt.zsh
+++ b/home/shell/zsh/prompt.zsh
diff --git a/home/zsh/sway.zsh b/home/shell/zsh/sway.zsh
index 69d5103..69d5103 100644
--- a/home/zsh/sway.zsh
+++ b/home/shell/zsh/sway.zsh
diff --git a/home/zsh/tmux.zsh b/home/shell/zsh/tmux.zsh
index 97944f5..97944f5 100644
--- a/home/zsh/tmux.zsh
+++ b/home/shell/zsh/tmux.zsh