Fix image link

blog/2024-03-25-boostrap-a-macos-machine-with-nix.markdown

@@ -0,0 +1,511 @@
+---
+layout: post
+title: "Bootstrapping a Mac with Nix"
+date: 2024-03-25
+comments: true
+tags: nix, macos, apple, nix-darwin, brew, homebrew
+---
+
+With [nix-darwin](https://github.com/LnL7/nix-darwin) and
+[home-manager](https://github.com/nix-community/home-manager) it is possible to
+manage almost all of a mac configuration declaratively. So when I got my new
+Macbook I was pretty sure this is the way to go. Unfortunately, the bootstrap
+is a bit involved. These are my notes from the process, which hopefully
+serves as a tutorial.
+
+## Installing dependencies
+
+We need to install some software manually before we can go full steam with
+configurations stored as nix files, the primary one being `nix` itself.
+
+Install nix with the [determinate systems nix installer](https://install.determinate.systems/), it comes with sensible defaults and a nicer uninstaller.
+
+Unfortunately, the GUI installer installs `x86_64` version of nix, so I had to use `curl |sh` for my `aarch64` Macbook.
+
+```sh
+curl --proto '=https' --tlsv1.2 -sSf -L https://install.determinate.systems/nix | sh -s -- install
+```
+![](/images/nix-install.png)
+
+If you haven't already, also install `Xcode tools` with `xcode-select --install`
+
+## Generating initial configurations
+
+We are going to use `nix-darwin` to keep a system wide configuration, which
+would represent packages that are installed, configuration for packages and
+configuration like shell aliases, files etc.
+
+nix-darwin has support for both classic `configuration.nix` tied to a nix-channel
+as well as flakes, I chose the latter as it allows more finer control over dependency versions[^1].
+
+```sh
+% nix flake init -t nix-darwin
+wrote: /Users/db/code/private/config/flake.nix
+# replace the hostname
+% sed -i '' "s/simple/$(scutil --get LocalHostName)/" flake.nix
+
+# Add to revision control
+git init
+git add flake.nix
+```
+
+This generates an example flake file, with some boilerplate code to get started.
+
+With some light editing:
+
+ 1. Moved the configuration to its on own file `configuration.nix`, and added it to git tree[^2].
+ 2. The appropriate `hostPlatform` for your mac. `nixpkgs.hostPlatform = "aarch64-darwin";`
+ 3. Set the home directory path `users.users.dj.home = "/Users/dj";`
+
+We end up with
+
+### flake.nix
+
+```nix
+{
+  description = "System flake configuration file";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    nix-darwin.url = "github:LnL7/nix-darwin";
+    nix-darwin.inputs.nixpkgs.follows = "nixpkgs";
+  };
+
+  outputs = inputs@{ self, nix-darwin, nixpkgs }: {
+    # Build darwin flake using:
+    # $ darwin-rebuild build --flake .#MacBook-Pro
+    darwinConfigurations."MacBook-Pro" =
+      nix-darwin.lib.darwinSystem {
+        system = "aarch64-darwin";
+        modules = [ ./configuration.nix ];
+      };
+
+    # Expose the package set, including overlays, for convenience.
+    darwinPackages = self.darwinConfigurations."MacBook-Pro".pkgs;
+  };
+}
+```
+
+### configuration.nix
+
+```nix
+{ config, lib, pkgs, ... }:
+
+{
+  # List packages installed in system profile. To search by name, run:
+  # $ nix-env -qaP | grep wget
+  environment.systemPackages = with pkgs; [
+  ];
+
+  users.users.dj.home = "/Users/dj";
+  # Auto upgrade nix package and the daemon service.
+  services.nix-daemon.enable = true;
+  # nix.package = pkgs.nix;
+
+  # Necessary for using flakes on this system.
+  nix.settings.experimental-features = "nix-command flakes";
+
+  # Create /etc/zshrc that loads the nix-darwin environment.
+  programs.zsh.enable = true; # default shell on catalina
+  # programs.fish.enable = true;
+
+  # Used for backwards compatibility, please read the changelog before changing.
+  # $ darwin-rebuild changelog
+  system.stateVersion = 3;
+
+  nix.configureBuildUsers = true;
+
+  # The platform the configuration will be used on.
+  nixpkgs.hostPlatform = "aarch64-darwin";
+}
+
+```
+
+Its time to bootstrap the system with `nix-darwin`!
+
+
+```sh
+% nix run nix-darwin -- switch --flake ~/.config/nix-darwin
+building the system configuration...
+[1/38/42 built, 227 copied (1406.7/1407.6 MiB), 237.3 MiB DL] building darwin-uninstaller (fixupPhase): str
+Password:
+setting up /run via /etc/synthetic.conf...
+user defaults...
+setting up user launchd services...
+setting up /Applications/Nix Apps...
+setting up pam...
+applying patches...
+setting up /etc...
+system defaults...
+setting up launchd services...
+creating service org.nixos.activate-system
+reloading service org.nixos.nix-daemon
+reloading nix-daemon...
+waiting for nix-daemon
+waiting for nix-daemon
+configuring networking...
+setting nvram variables...
+```
+During the bootstrap, `nix-darwin` installs the command `darwin-rebuild`, subsequent rebuilds should use `darwin-rebuild`.
+
+Both `nix-darwin` and `darwin-rebuild` follows same semantics as `nixos-rebuild`, `test` for test activation, `build` for only building the configuration, `switch` for commit and activate etc.
+
+## Install some packages
+
+I have a set of packages that I like to have available system-wide (for all users). Add those to
+`environment.systemPackages` in `configuration.nix`, which gives us:
+
+```nix
+{ config, lib, pkgs, ... }:
+
+{
+  # List packages installed in system profile. To search by name, run:
+  # $ nix-env -qaP | grep wget
+  environment.systemPackages = with pkgs; [
+    vim
+    curl
+    gitAndTools.gitFull
+    mg
+    mosh
+  ];
+...
+```
+
+Activate with `darwin-rebuild switch --flake ~/path-to-config-directory` 
+
+## Home Manager
+
+[home-manager](https://github.com/nix-community/home-manager) is a nix community project for managing user environments, it comes with a [tone of module for configuring more day-to-day user facing programs](https://home-manager-options.extranix.com/), for e.g the git module for configuring, well git.
+
+```nix
+programs.git = {
+  enable = true;
+  extraConfig = {
+    github.user = "<user>";
+    init = { defaultBranch = "trunk"; };
+    diff = { external = "${pkgs.difftastic}/bin/difft"; };
+  };
+};
+```
+
+Install `home-manager` with flakes,
+
+1. Add a flake input in the inputs section
+```nix
+home-manager = {
+    url = "github:nix-community/home-manager";
+    inputs.nixpkgs.follows = "nixpkgs-unstable";
+};
+```
+
+2. And add the module to the `modules` section
+
+```nix
+home-manager.darwinModules.home-manager {
+  # `home-manager` config
+  home-manager.useGlobalPkgs = true;
+  home-manager.useUserPackages = true;
+  home-manager.users.db = import ./home.nix;
+};
+```
+
+I choose to keep the home configuration in a separate file, `home.nix`.
+
+```nix
+{ config, lib, pkgs, ... }:
+
+{
+  home.stateVersion = "23.11";
+
+  programs.git = {
+    enable = true;
+    userName = "name";
+    userEmail = "mail@example.org";
+    extraConfig = {
+      github.user = "<user>";
+      init = { defaultBranch = "trunk"; };
+      diff = { external = "${pkgs.difftastic}/bin/difft"; };
+    };
+  };
+}
+```
+
+Also the updated `flake.nix` is now
+
+```nix
+{
+  description = "System flake configuration file";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    nix-darwin.url = "github:LnL7/nix-darwin";
+    nix-darwin.inputs.nixpkgs.follows = "nixpkgs";
+
+    home-manager = {
+      url = "github:nix-community/home-manager";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+  };
+
+  outputs = inputs@{ self, nix-darwin, nixpkgs, home-manager, nix-homebrew
+    , homebrew-core, homebrew-cask, homebrew-bundle, ... }:
+    {
+      # Build darwin flake using:
+      # $ darwin-rebuild build --flake .#MacBook-Pro
+      darwinConfigurations."MacBook-Pro" =
+        nix-darwin.lib.darwinSystem {
+          system = "aarch64-darwin";
+          modules = [
+            ./configuration.nix
+
+            home-manager.darwinModules.home-manager
+            {
+              # `home-manager` config
+              home-manager.useGlobalPkgs = true;
+              home-manager.useUserPackages = true;
+              home-manager.users.db = import ./home.nix;
+            }
+
+          ];
+        };
+
+      # Expose the package set, including overlays, for convenience.
+      darwinPackages =
+        self.darwinConfigurations."MacBook-Pro".pkgs;
+    };
+}
+
+```
+
+If you get an error `Error: HOME is set to "/Users/<username>" but we expect "/var/empty"`, make sure you have set `users.users.<username>.home` in configuration.nix.
+
+
+## Manage homebrew applications
+
+Sadly, nix still has some catching up to do with mac compatibility, biggest gripe for me was [accessing GUI apps with spotlight seems to need some workarounds](https://github.com/LnL7/nix-darwin/issues/214). Luckily brew solves this and we can just install applications with brew, still managed by nix.
+
+`nix-darwin` can declaratively manage brew packages, however we need [nix-homebrew](https://github.com/zhaofengli/nix-homebrew) to install brew itself and manage the taps declaratively.
+
+Grab nix-homebrew using flakes, and also add the taps itself as inputs, this maybe the most underrated flakes feature. We can pin the taps to a specific version!
+
+```nix
+inputs = {
+    nix-homebrew = {
+      url = "github:zhaofengli-wip/nix-homebrew";
+      inputs.nixpkgs.follows = "nixpkgs-unstable";
+    };
+
+    homebrew-core = {
+      url = "github:homebrew/homebrew-core";
+      flake = false;
+    };
+    homebrew-cask = {
+      url = "github:homebrew/homebrew-cask";
+      flake = false;
+    };
+    homebrew-bundle = {
+      url = "github:homebrew/homebrew-bundle";
+      flake = false;
+    };
+
+```
+
+.. and import the module into the system configuration.
+
+```nix
+nix-homebrew.darwinModules.nix-homebrew
+{
+  nix-homebrew = {
+    enable = true;
+    # Apple Silicon Only: Also install Homebrew under the default Intel prefix for Rosetta 2
+    enableRosetta = true;
+    user = "username";
+
+    taps = {
+      "homebrew/homebrew-core" = homebrew-core;
+      "homebrew/homebrew-cask" = homebrew-cask;
+      "homebrew/homebrew-bundle" = homebrew-bundle;
+    };
+    mutableTaps = false;
+  };
+}
+```
+
+The package installations are itself managed by nix-darwin, using `homebrew.*` options.
+```nix
+homebrew = {
+  enable = true;
+  global.autoIpdate = false;
+
+  casks = [ "kitty" ];
+};
+```
+
+## Fin!
+
+If you have followed through all of the above, like me, you should have a mac with almost everything configured declaratively, using nix. 
+
+Further customizations options can be found in 
+
+ - [nix-darwin options search](https://daiderd.com/nix-darwin/manual/index.html), you could also use `man configuration.nix`
+ - [Home manager option search](https://home-manager-options.extranix.com/)
+ 
+
+This setup helps me share configuration with my other machines; they are just an `import` away! However this bootstrapping is neither simple nor short, that's definitly something to improve.
+
+[^1]: Explaining flakes or nix nuanceses are out of scope and probably out of my reach, <https://nixos-and-flakes.thiscute.world/> is a better resource.
+[^2]: For flake build system to find them, git should be aware of the files.
+
+## Final configuration files
+
+<details>
+  <summary>flake.nix</summary>
+```nix
+{
+  description = "System flake configuration file";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    nix-darwin.url = "github:LnL7/nix-darwin";
+    nix-darwin.inputs.nixpkgs.follows = "nixpkgs";
+
+    home-manager = {
+      url = "github:nix-community/home-manager";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+    nix-homebrew = { url = "github:zhaofengli-wip/nix-homebrew"; };
+
+    homebrew-core = {
+      url = "github:homebrew/homebrew-core";
+      flake = false;
+    };
+    homebrew-cask = {
+      url = "github:homebrew/homebrew-cask";
+      flake = false;
+    };
+    homebrew-bundle = {
+      url = "github:homebrew/homebrew-bundle";
+      flake = false;
+    };
+
+  };
+
+  outputs = inputs@{ self, nix-darwin, nixpkgs, home-manager, nix-homebrew
+    , homebrew-core, homebrew-cask, homebrew-bundle, ... }: {
+      # Build darwin flake using:
+      # $ darwin-rebuild build --flake .#MacBook-Pro
+      darwinConfigurations."MacBook-Pro" =
+        nix-darwin.lib.darwinSystem {
+          system = "aarch64-darwin";
+          modules = [
+            ./configuration.nix
+
+            home-manager.darwinModules.home-manager
+            {
+              # `home-manager` config
+              home-manager.useGlobalPkgs = true;
+              home-manager.useUserPackages = true;
+              home-manager.users.db = import ./home.nix;
+            }
+
+            nix-homebrew.darwinModules.nix-homebrew
+            {
+              nix-homebrew = {
+                enable = true;
+                # Apple Silicon Only: Also install Homebrew under the default Intel prefix for Rosetta 2
+                enableRosetta = true;
+                user = "db";
+
+                taps = {
+                  "homebrew/homebrew-core" = homebrew-core;
+                  "homebrew/homebrew-cask" = homebrew-cask;
+                  "homebrew/homebrew-bundle" = homebrew-bundle;
+                };
+                mutableTaps = false;
+              };
+            }
+
+          ];
+        };
+
+      # Expose the package set, including overlays, for convenience.
+      darwinPackages =
+        self.darwinConfigurations."MacBook-Pro".pkgs;
+    };
+}
+```
+</details>
+
+<details>
+  <summary>configuration.nix</summary>
+```nix
+{ config, lib, pkgs, ... }:
+
+{
+  # List packages installed in system profile. To search by name, run:
+  # $ nix-env -qaP | grep wget
+  environment.systemPackages = with pkgs; [
+    vim
+    curl
+    gitAndTools.gitFull
+    mg
+    mosh
+  ];
+
+  homebrew = {
+    enable = true;
+    global.autoUpdate = false;
+
+    casks = [ "kitty" ];
+  };
+
+  users.users.db.home = "/Users/db";
+
+  # Auto upgrade nix package and the daemon service.
+  services.nix-daemon.enable = true;
+  # nix.package = pkgs.nix;
+
+  # Necessary for using flakes on this system.
+  nix.settings.experimental-features = "nix-command flakes";
+
+  # Create /etc/zshrc that loads the nix-darwin environment.
+  programs.zsh.enable = true; # default shell on catalina
+  # programs.fish.enable = true;
+
+  # Used for backwards compatibility, please read the changelog before changing.
+  # $ darwin-rebuild changelog
+  system.stateVersion = 3;
+
+  nix.configureBuildUsers = true;
+
+  # The platform the configuration will be used on.
+  nixpkgs.hostPlatform = "aarch64-darwin";
+}
+
+```
+</details>
+<details>
+  <summary>home.nix</summary>
+```nix
+{ config, pkgs, ... }:
+
+{
+  home.stateVersion = "23.11";
+  programs.git = {
+    enable = true;
+    userName = "user name";
+    userEmail = "email";
+    extraConfig = {
+      github.user = "gh_user";
+      init = { defaultBranch = "trunk"; };
+      diff = { external = "${pkgs.difftastic}/bin/difft"; };
+    };
+  };
+}
+```
+</details>
+

css/pages.css

@@ -6,19 +6,24 @@ body {
     max-width: 1000px;
     padding: 1em;
     text-align: left;
-    font-size: 16pt;
+    font-size: 14pt;
 }
 
 h1 {
     font-weight: normal;
     font-family: Charter, "Bitstream Charter", "Sitka Text", Cambria, serif;
-    font-size: 38pt;
+    font-size: 36pt;
     font-weight: bold;
 }
 
 h2 {
     font-family: Charter, "Bitstream Charter", "Sitka Text", Cambria, serif;
-    font-size: 24pt;
+    font-size: 22pt;
     margin-top: 1.5em;
     font-weight: bold;
 }
+
+img {
+    width: 400px;
+    height: auto;
+}

css/theme.css

@@ -155,6 +155,7 @@ code {
 img {
     max-width: 100%;
     margin: 0px;
+    height: auto;
 }
 
 figure {

flake.nix

@@ -16,10 +16,10 @@
         builder = pkgs.haskellPackages.callCabal2nix "blogng" ./. { };
       in {
 
-        packages.default = self.packages.${system}.website;
+        packages.default = self.packages.${system}.blog;
         defaultPackage = self.packages.${system}.default;
 
-        packages.website = pkgs.stdenv.mkDerivation rec {
+        packages.blog = pkgs.stdenv.mkDerivation rec {
           name = "blog";
           LANG = "en_US.UTF-8";
           LC_ALL = "en_US.UTF-8";
@@ -49,6 +49,8 @@
             cabal-install
             nodePackages.prettier
             python3
+            # mogrify -strip to strip images
+            imagemagick
           ];
         };
         devShell = self.devShells.${system}.default;

pages/about.md

@@ -1,11 +1,11 @@
 
 # [Dhananjay Balan](https://dbalan.in)
 
-![](./images/profile.jpg){height=400px}
+![](./images/profile.jpg)
 
-Interested in **all things technology**. Easily nerd snipe-able, especially when related to old tech, photography, cooking or biking.
+Interested in **all things technology**. Easily nerd-sniped, especially when related to old tech, photography, cooking or biking.
 
-Hailing from **Kerala, India**, Currently based in **Berlin, Germany**.
+Hailing from **Kerala, India**, Based in **Berlin, Germany**.
 
 Currently tending infrastructure at [Voltus](https://voltus.co), previously at [Port Zero](https://port-zero.com), [CLIQZ](https://cliqz.com) and [Plivo](https://plivo.com), an outdated résumé is available at <https://resume.dbalan.in>
 
@@ -15,7 +15,7 @@ Always building, seldom finishing
 - <https://quotes.dbalan.in> — an opinionated minimal readwise.io clone ([source](https://git.planet-express.in/dbalan/quotes-api))
 - <https://cookbook.dbalan.in> -- Recipe lists on cooking rotation, over-engineered this one to generate a static site from yaml spec ([source](https://github.com/dbalan/recipes)).
 - <http://nossl.dbalan.in> -- Webpage with no TLS termination, a landing page for those nasty captive portal redirects.
-- <https://github.com/NixOS/nixpkgs> — NixOS is my main daily driver, my frustrations with it sometimes result in patches upstream.
+- <https://github.com/NixOS/nixpkgs> — NixOS is my main daily driver, my frustrations sometimes result in patches.
 
 ## Elsewhere on the Internet
 - I love getting mail, say hi -- `hey AT this domain`

templates/default.html

@@ -1,9 +1,9 @@
 <!doctype html>
 <html lang="en">
   <head>
-        <meta charset="utf-8">
+    <meta charset="utf-8" />
-        <meta http-equiv="x-ua-compatible" content="ie=edge">
+    <meta http-equiv="x-ua-compatible" content="ie=edge" />
-        <meta name="viewport" content="width=device-width, initial-scale=1">
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
     <title>$title$</title>
     <link rel="stylesheet" href="/css/fonts.css" />
     <link rel="stylesheet" href="/css/theme.css" />
@@ -13,13 +13,15 @@
     <header>
       <div class="header">
         <div id="title"><a href="/">BINARY STROLLS</a></div>
-          <div id="nav"><a href="/archive.html">Archive</a>⬦<a href="https://dbalan.in">About</a></div>
+        <div id="nav">
+          <a href="/archive.html">Archive</a>⬦<a href="https://dbalan.in"
+            >About</a
+          >
+        </div>
       </div>
     </header>
-        <section>
+    <section>$body$</section>
-          $body$
+    <hr id="footerdiv" />
-        </section>
-        <hr id="footerdiv">
     <footer>
       <p><a href="https://notwork.in/@notmycommit">Comments? toot me!</a></p>
       <p>
@@ -27,12 +29,16 @@
         <a href="https://jaspervdj.be/hakyll/"> built with hakyll</a> -
         <a href="/atom.xml"> Atom Feed</a>
       </p>
-	  <a href="https://creativecommons.org/licenses/by-nc/4.0/"><img src="/images/cc-by-nc.svg"></a>
+      <a href="https://creativecommons.org/licenses/by-nc/4.0/"
+        ><img src="/images/cc-by-nc.svg"
+      /></a>
       <p>
-           Want to become a better programmer? <a href="https://www.recurse.com/scout/click?t=7fa4273c56d752484c0e30d3fbb0d52a">Join the Recurse Center!</a>
+        Want to become a better programmer?
+        <a
+          href="https://www.recurse.com/scout/click?t=7fa4273c56d752484c0e30d3fbb0d52a"
+          >Join the Recurse Center!</a
+        >
       </p>
-
     </footer>
   </body>
-    </body>
 </html>

templates/pages.html

@@ -10,6 +10,7 @@
     <link rel="stylesheet" href="/css/theme.css" />
     <link rel="stylesheet" href="/css/syntax.css" />
     <link rel="stylesheet" href="/css/pages.css" />
+    <link rel="me" href="https://notwork.in/@notmycommit" />
 
     <!-- Place favicon.ico in the root directory -->
   </head>