fix: Configure Neovim using a wrappers

README.org

@@ -15,6 +15,23 @@ A second try at NixOS, now that I have a better idea of what I'm doing. The effo
 
 Modules, but lightweight.
 
+* Principles
+
+** User configuration
+
+In order of descending preference, user programs should be configured by...
+
+1. Wrappers, with config files optionally living somewhere under =/persist/dots=.
+2. home-manager's modules.
+3. ~home.file~ and similar.
+4. Mutable symlinks using ~home.file~ and ~mkOutOfStoreSymlink~.
+
+* Conventions
+
+** Impermanence and persistence
+
+- Persistent files to be linked into ~/~ go under ~/persist/root~
+
 * Tasks
 
 ** Emacs
@@ -166,6 +183,10 @@ Or Qtile
 
 Or Niri
 
+** TODO Convenient way to wrap programs
+
+[[https://github.com/viperML/wrapper-manager][wrapper-manager]] looks like it will be really annoying to integrate into my config without a NixOS/HM module.
+
 ** TODO tf2.nix
 
 - declaratively configure tf2
@@ -228,10 +249,6 @@ https://discourse.nixos.org/t/what-to-do-with-a-full-boot-partition/2049
 
 Remove a given host from =~/.ssh/known_hosts=. Something like =sed -i -e '/192.168.122.54/d' .ssh/known_hosts=.
 
-* Impermanence and persistence
-
-- Persistent files to be linked into ~/~ go under ~/persist/root~
-
 * References
 
 Following is a subset of the many places I've learnt from.
@@ -242,3 +259,5 @@ Following is a subset of the many places I've learnt from.
 - [[https://github.com/hlissner/dotfiles/][hlissner/dotfiles]]
 - [[https://github.com/Shawn8901/nix-configuration/tree/af71d51998a6772a300f842795b947e27202fa73][Shawn8901/nix-configuration]]
 - [cite:@christensen2020erase]
+- [cite:@ayats2024dropping]
+- [cite:@zaynetdinov2024you]

users/crumb/programs/nvim.nix

@@ -1,12 +1,31 @@
 { config, lib, pkgs, ... }:
 
-{
-  home.file.".vimrc".text = ''
-    imap jk <ESC>
-    xmap JK <ESC>
-  '';
+let
+  my-vimrc =
+    pkgs.writeTextFile {
+      name = "vimrc";
+      text = ''
+        imap jk <ESC>
+        xmap JK <ESC>
+        set number
+        set relativenumber
+      '';
+    };
 
-  xdg.configFile."nvim/init.vim".text = ''
-    so ~/.vimrc
-  '';
+  my-neovim =
+    pkgs.symlinkJoin {
+      name = "neovim";
+      paths = [ pkgs.neovim ];
+      buildInputs = [ pkgs.makeWrapper ];
+      postBuild = ''
+        wrapProgram $out/bin/nvim \
+          --add-flags "-u ${my-vimrc}"
+        # Symlink {v,vi,vim} to nvim.
+        for i in {v,vi,vim}; do
+          ln -s $out/bin/nvim $out/bin/$i
+        done
+      '';
+    };
+in {
+  home.packages = [ my-neovim ];
 }