getting stuff ready for flake to see

flake.lock

@@ -22,6 +22,23 @@
         "type": "github"
       }
     },
+    "cmp-vimtex": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1708936870,
+        "narHash": "sha256-07FqXsRe0RP5f3b6osrsi5gai+bZi9ybm5JL/nnBH+4=",
+        "owner": "micangl",
+        "repo": "cmp-vimtex",
+        "rev": "613fbfc54d9488252b0b0289d6d1d60242513558",
+        "type": "github"
+      },
+      "original": {
+        "owner": "micangl",
+        "ref": "master",
+        "repo": "cmp-vimtex",
+        "type": "github"
+      }
+    },
     "flake-compat": {
       "flake": false,
       "locked": {
@@ -132,6 +149,7 @@
     "root": {
       "inputs": {
         "NixOS-WSL": "NixOS-WSL",
+        "cmp-vimtex": "cmp-vimtex",
         "homeManager": "homeManager",
         "homeManager-23-11": "homeManager-23-11",
         "nixpkgs": "nixpkgs",

flake.nix

@@ -1,28 +1,37 @@
 {
+
 	description = "Configuration v1";
 
 	inputs = {
-			nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+		nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
 
-			nixpkgs-23-11.url = "github:NixOS/nixpkgs/nixos-23.11";
+		nixpkgs-23-11.url = "github:NixOS/nixpkgs/nixos-23.11";
-			homeManager = {
+		homeManager = {
-				url = "github:nix-community/home-manager";
+			url = "github:nix-community/home-manager";
-				inputs.nixpkgs.follows = "nixpkgs";
+			inputs.nixpkgs.follows = "nixpkgs";
-			};
-
-                        homeManager-23-11 = {
-				url = "github:nix-community/home-manager/release-23.11";
-				inputs.nixpkgs.follows = "nixpkgs-23-11";
-			};
-
-			NixOS-WSL = {
-			  url = "github:nix-community/NixOS-WSL";
-			  inputs.nixpkgs.follows = "nixpkgs";
-			};
 		};
 
-	outputs = { self, nixpkgs, homeManager, NixOS-WSL, nixpkgs-23-11, homeManager-23-11, ...}@inputs: {
+		homeManager-23-11 = {
+			url = "github:nix-community/home-manager/release-23.11";
+			inputs.nixpkgs.follows = "nixpkgs-23-11";
+		};
 
+		NixOS-WSL = {
+			url = "github:nix-community/NixOS-WSL";
+			inputs.nixpkgs.follows = "nixpkgs";
+		};
+
+		cmp-vimtex = {
+			url = "github:micangl/cmp-vimtex/master";
+			flake = false;
+		};
+	};
+
+	outputs = { self, nixpkgs, homeManager, NixOS-WSL, nixpkgs-23-11, homeManager-23-11, cmp-vimtex, ...}@inputs:
+        let
+		customPackageOverlay = import ./overlays/cmp-vimtex.nix { inherit cmp-vimtex; };
+	in
+	{
 		nixosConfigurations = (
 			import ./hosts/hosts.nix {
 				inherit nixpkgs;
@@ -30,8 +39,10 @@
 				inherit inputs;
 				inherit (nixpkgs) lib;
 				inherit NixOS-WSL;
-                                inherit nixpkgs-23-11;
+				inherit nixpkgs-23-11;
-                                inherit homeManager-23-11;
+				inherit homeManager-23-11;
+				inherit cmp-vimtex;
+				inherit customPackageOverlay;
 			}
 		);
 

home/deepak/home.nix

@@ -82,10 +82,17 @@
       vim-fugitive
       friendly-snippets
       luasnip
+      pkgs.customVimPlugins.cmp-vimtex
     ];
     extraConfig = ''
       inoremap jj <Esc>
       inoremap kk <Esc>
+
+      set tabstop=4
+      set noexpandtab
+      set list
+      set listchars=eol:¬,tab:▸\,trail:·
+
       lua << EOF
 
       local lsp_zero = require('lsp-zero')
@@ -104,6 +111,7 @@
           {name = 'nvim_lsp'},
           {name = 'buffer'},
           {name = 'luasnip'},
+          {name = 'vimtex'},
         },
         formatting = cmp_format,
         mapping = cmp.mapping.preset.insert({

hosts/hosts.nix

@@ -1,7 +1,10 @@
-{ lib, inputs, nixpkgs, nixpkgs-23-11, homeManager, homeManager-23-11, NixOS-WSL, ... }:
+{ lib, inputs, nixpkgs-23-11, homeManager, homeManager-23-11, NixOS-WSL, customPackageOverlay, ... }:
 {
 	"maxos" = lib.nixosSystem {
 		system = "x86_64-linux";
+		specialArgs = {
+			inherit customPackageOverlay;
+		};
 		modules = [
 			./maxos/configuration.nix
 			homeManager.nixosModules.home-manager {
@@ -19,6 +22,9 @@
 
 	"nixosWSL" = nixpkgs-23-11.lib.nixosSystem {
 		system = "x86_64-linux";
+		specialArgs = {
+			inherit customPackageOverlay;
+		};
 		modules = [
 			./nixosWSL/configuration.nix
 			homeManager-23-11.nixosModules.home-manager {

hosts/maxos/configuration.nix

@@ -2,7 +2,7 @@
 # your system.  Help is available in the configuration.nix(5) man page
 # and in the NixOS manual (accessible by running ‘nixos-help’).
 
-{ pkgs, ... }:
+{ pkgs, customPackageOverlay, ... }:
 
 let
   custom-fonts = import ../../fonts { inherit pkgs; };
@@ -109,6 +109,9 @@ in
   programs.zsh.enable = true;
 
   nixpkgs.config.allowUnfree = true;
+  nixpkgs.overlays = [
+    customPackageOverlay.overlay
+  ];
 
   # Some programs need SUID wrappers, can be configured further or are
   # started in user sessions.

hosts/nixosWSL/configuration.nix

@@ -1,4 +1,4 @@
-{ pkgs, modulesPath, ... }:
+{ pkgs, customPackageOverlay, modulesPath, ... }:
 
 let
   custom-fonts = import ../../fonts { inherit pkgs; };
@@ -34,6 +34,10 @@ in
     experimental-features = nix-command flakes
   '';
 
+  nixpkgs.overlays = [
+    customPackageOverlay.overlay
+  ];
+
   system.stateVersion = "22.05";
 
   # Define a user account. Don't forget to set a password with ‘passwd’.

overlays/cmp-vimtex.nix

@@ -0,0 +1,15 @@
+{ cmp-vimtex }:
+{
+  overlay = final: prev:
+     let
+       cmpVimtexPlugin = prev.vimUtils.buildVimPlugin {
+         src = cmp-vimtex;
+         name = "cmp-vimtex";
+       };
+     in
+     {
+       customVimPlugins = [
+         cmpVimtexPlugin
+       ];
+     };
+}