feat(git): add git module, set user config

Adds forAllUsers' function and docstrings to nix lib.

nix/homes/rafiq/git.nix

@@ -0,0 +1,22 @@
+{
+  flake.homes.rafiq = {
+    home.shellAliases = {
+      gs = "git status";
+      gc = "git commit";
+      gcam = "git commit -am";
+      gu = "git push";
+      gy = "git pull";
+      gdh = "git diff HEAD";
+    };
+    programs.git = {
+      signing.signByDefault = true;
+      extraConfig = {
+        init.defaultBranch = "prime";
+        push.autoSetupRemote = true;
+        pull.rebase = false;
+        core.editor = "$EDITOR";
+        gpg.format = "ssh";
+      };
+    };
+  };
+}

nix/lib/default.nix

@@ -5,7 +5,92 @@ let
 in
 {
   flake.lib = {
+    /**
+      Remove the top level attributes from an attribute set and return the merged attributes.
+
+      # Inputs
+
+      `attrset`
+
+      : An attribute set to flatten.
+
+      # Type
+
+      ```
+      flattenAttrs :: AttrSet -> AttrSet
+      ```
+
+      # Examples
+      :::{.example}
+      ## `flattenAttrs` usage example
+
+      ```nix
+      flattenAttrs { x = { a = 1; b = 2; }; y = { c = 3; d = 4; }; }
+      => { a = 1; b = 2; c = 3; d = 4; }
+      ```
+    */
     flattenAttrs = attrset: concatMapAttrs (_: v: v) attrset;
-    forAllUsers = f: mapAttrs f cfg.manifest.users;
+
+    /**
+      Return an attribute set for use with a option that needs to be used for all users.
+
+      # Inputs
+
+      `attrset`
+
+      : An attribute set to apply to all the users.
+
+      # Type
+
+      ```
+      forAllUsers :: AttrSet -> AttrSet
+      ```
+
+      # Examples
+      :::{.example}
+      ## `forAllUsers` usage example
+
+      ```nix
+      flake.manifest.users.rafiq = { ... };
+      flake.modules.nixos.default.users = forAllUsers {
+        isNormalUser = true;
+      };
+      => flake.modules.nixos.default.users.rafiq.isNormalUser = true;
+      ```
+
+      :::
+    */
+    forAllUsers = attrset: mapAttrs (_: _: attrset) cfg.manifest.users;
+
+    /**
+      Like forAllUsers, but passes in the name and value from the manifest.
+
+      # Inputs
+
+      `f`
+
+      : A function that takes an attribute name and its value, and returns the new value for the attribute.
+
+      # Type
+
+      ```
+      forAllUsers' :: (String -> Any -> Any) -> AttrSet
+      ```
+
+      # Examples
+      :::{.example}
+      ## `forAllUsers'` usage example
+
+      ```nix
+      flake.manifest.users.rafiq = { ... };
+      flake.modules.homeManager.users = forAllUsers' (name: value: {
+        home.username = name;
+      });
+      => flake.modules.homeManager.default.users.rafiq.home.username = "rafiq";
+      ```
+
+      :::
+    */
+    forAllUsers' = f: mapAttrs f cfg.manifest.users;
   };
 }

nix/manifest.nix

@@ -15,7 +15,7 @@ in
   flake.manifest = {
     users.rafiq = {
       primary = true;
-      username = "rafiq"; # If we don't set this here we have to do some weird shit
+      name = "Mohammad Rafiq";
       email = "rafiq@rrv.sh";
       shell = "fish";
       pubkey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILdsZyY3gu8IGB8MzMnLdh+ClDxQQ2RYG9rkeetIKq8n rafiq";

nix/modules/git.nix

@@ -0,0 +1,12 @@
+{
+  flake.modules.homeManager.default =
+    { manifest, config, ... }:
+    {
+      home.sessionVariables.GIT_CONFIG_GLOBAL = "$HOME/.config/git/config";
+      programs.git = {
+        userName = manifest.users.${config.home.username}.name;
+        userEmail = manifest.users.${config.home.username}.email;
+        signing.key = "~/.ssh/id_ed25519.pub";
+      };
+    };
+}

nix/modules/home-manager.nix

@@ -1,14 +1,16 @@
 { inputs, config, ... }:
 let
-  inherit (cfg.lib) flattenAttrs;
+  inherit (cfg.lib) forAllUsers' flattenAttrs;
   cfg = config.flake;
   hm = inputs.home-manager;
   globalCfg = {
     useGlobalPkgs = true;
     useUserPackages = true;
+    extraSpecialArgs = { inherit (cfg) manifest; };
     sharedModules = [
       (flattenAttrs (cfg.modules.homeManager or { }))
     ];
+    users = forAllUsers' (name: _: cfg.homes.${name});
   };
 in
 {

nix/modules/hosts.nix

@@ -18,6 +18,7 @@ let
         nixosSystem {
           specialArgs = {
             inherit inputs;
+            inherit (cfg) manifest;
             hostName = name;
           };
           modules = [

nix/modules/shell.nix

@@ -0,0 +1,22 @@
+{ config, lib, ... }:
+let
+  cfg = config.flake;
+  inherit (cfg.lib) forAllUsers';
+  inherit (lib.attrsets) mapAttrs';
+in
+{
+  flake.modules.nixos.default =
+    { pkgs, ... }:
+    {
+      programs = mapAttrs' (name: value: {
+        name = value.shell;
+        value.enable = true;
+      }) cfg.manifest.users;
+      users.users = forAllUsers' (_: value: { shell = pkgs.${value.shell}; });
+    };
+  flake.modules.homeManager.default =
+    { config, ... }:
+    {
+      programs.${cfg.manifest.users.${config.home.username}.shell}.enable = true;
+    };
+}

nix/modules/users.nix

@@ -1,35 +1,31 @@
 { config, lib, ... }:
 let
   cfg = config.flake;
-  inherit (config.flake.lib) forAllUsers flattenAttrs;
-  inherit (lib.attrsets) filterAttrs;
-  owner = flattenAttrs (filterAttrs (_: v: (v.primary or false)) cfg.manifest.users);
+  inherit (cfg.lib) forAllUsers';
+  inherit (lib.lists) optional;
 in
 {
   flake.modules.nixos.default =
-    { pkgs, config, ... }:
+    { config, ... }:
     {
       #TODO: move sudo/security options elsewhere
-      security.sudo.wheelNeedsPassword = false;
-      nix.settings.trusted-users = [ "@wheel" ];
-      #TODO: move to shell config
-      programs.${owner.shell}.enable = true;
+      # security.sudo.wheelNeedsPassword = false;
+      # nix.settings.trusted-users = [ "@wheel" ];
       #TODO: move ssh key settings elsewhere
+      # users.users.root.openssh.authorizedKeys.keys = [ owner.pubkey ];
       users = {
         mutableUsers = false;
         groups.users.gid = 100;
-        users.root.openssh.authorizedKeys.keys = [ owner.pubkey ];
-        users.${owner.username} = {
-          isNormalUser = true;
-          # hashedPasswordFile
-          extraGroups = [ "wheel" ];
-          shell = pkgs.${owner.shell};
-          openssh.authorizedKeys.keys = [ owner.pubkey ];
-        };
+        users = forAllUsers' (
+          _: value: {
+            isNormalUser = true;
+            extraGroups = optional (value.primary or false) "wheel";
+            openssh.authorizedKeys.keys = [ value.pubkey ];
+          }
+        );
       };
-      home-manager.users = forAllUsers (
+      home-manager.users = forAllUsers' (
         name: _: {
-          #TODO: move into nixos/darwin config - should not apply to homeConfigurations
           home.username = name;
           home.homeDirectory = config.users.users.${name}.home;
         }