From eb6ada8b323d41a3e37ba4ac6f0dde1d9a734df8 Mon Sep 17 00:00:00 2001
From: Dmitry Voronin <account@voronind.com>
Date: Tue, 20 Feb 2024 19:29:01 +0300
Subject: [PATCH] Nix : Add nix_live.

---
 .config/bash/module/Nix.sh                 | 19 ++++++++++---------
 .config/linux/system/flake.nix             | 14 ++++++++++++++
 .config/linux/system/module/common/Nix.nix |  4 +---
 3 files changed, 25 insertions(+), 12 deletions(-)

diff --git a/.config/bash/module/Nix.sh b/.config/bash/module/Nix.sh
index 9864dec..14b80fb 100644
--- a/.config/bash/module/Nix.sh
+++ b/.config/bash/module/Nix.sh
@@ -1,3 +1,5 @@
+export _nix_system_config="~/.config/linux/system"
+
 # Rebuild system.
 # Optionally force the hostname.
 # Usage: nix_rebuild [HOSTNAME]
@@ -5,9 +7,7 @@ function nix_rebuild() {
 	local target="${1}"
 	[[ "${target}" = "" ]] && target="${HOSTNAME}"
 
-	cd ${HOME}/.config/linux/system
-	nixos-rebuild boot --flake ".#${target}"
-	cd -
+	nixos-rebuild boot --flake "${_nix_system_config}#${target}"
 }
 
 # Rebuild and switch system.
@@ -17,17 +17,13 @@ function nix_switch() {
 	local target="${1}"
 	[[ "${target}" = "" ]] && target="${HOSTNAME}"
 
-	cd "${HOME}/.config/linux/system"
-	nixos-rebuild switch --flake ".#${target}"
-	cd -
+	nixos-rebuild switch --flake "${_nix_system_config}#${target}"
 }
 
 # Update system versions.
 # Usage: nix_update
 function nix_update() {
-	cd "${HOME}/.config/linux/system"
-	nix flake update
-	cd -
+	nix flake update --flake "${_nix_system_config}"
 }
 
 # Free up root space.
@@ -71,6 +67,11 @@ function nix_tmpshell() {
 }
 alias tmpshell="nix_tmpshell"
 
+# Build live image.
+function nix_live() {
+	nix build "${_nix_system_config}#installer.iso"
+}
+
 # Autocomplete with available hosts.
 function _comp_hosts() {
 	local IFS=$'\n'
diff --git a/.config/linux/system/flake.nix b/.config/linux/system/flake.nix
index b893983..d4812d4 100644
--- a/.config/linux/system/flake.nix
+++ b/.config/linux/system/flake.nix
@@ -27,6 +27,12 @@
 			./module/common/Users.nix
 		];
 
+		# Live system.
+		installer = installer-gen.generate {
+			inputFlake   = self;
+			targetConfig = nixosConfigurations.live;
+		};
+
 		# Function to create a host.
 		mkHost = { system, hostname, modules }: nixpkgs.lib.nixosSystem {
 			inherit system;
@@ -107,6 +113,14 @@
 			];
 		};
 
+		nixosConfigurations.live = self.mkHost {
+			hostname = "live";
+			system   = "x86_64-linux";
+			modules = [
+				./module/Gnome.nix
+			];
+		};
+
 		nixosConfigurations.work = self.mkHost {
 			hostname = "work";
 			system   = "x86_64-linux";
diff --git a/.config/linux/system/module/common/Nix.nix b/.config/linux/system/module/common/Nix.nix
index cb8af05..b509f07 100644
--- a/.config/linux/system/module/common/Nix.nix
+++ b/.config/linux/system/module/common/Nix.nix
@@ -1,6 +1,4 @@
-{ ... }:
-
-{
+{ ... }: {
 	nixpkgs.config.allowUnfree       = true;
 	nix.settings.auto-optimise-store = true;
 }