From 132596e08e1232cf8d7697859234875941c0ffb1 Mon Sep 17 00:00:00 2001
From: Josh Hoffer <jhoffer@sansorgan.es>
Date: Fri, 22 Nov 2024 17:54:31 -0800
Subject: [PATCH] Make all version metadata fields configurable

Downstream users of NixOS may adapt it for their own products or
distro variants. Customizing the version information is ideal so
users of these downstream derivatives can see the correct branding,
version, and lifecycle support dates of these derivative projects.

Add options for SUPPORT_END and LOGO. Make release and codeName
internal options instead of readOnly.
---
 nixos/modules/misc/version.nix | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/nixos/modules/misc/version.nix b/nixos/modules/misc/version.nix
index f77261b162a6e..df78ff5a707a8 100644
--- a/nixos/modules/misc/version.nix
+++ b/nixos/modules/misc/version.nix
@@ -30,7 +30,7 @@ let
       BUILD_ID = cfg.version;
       PRETTY_NAME = "${cfg.distroName} ${cfg.release} (${cfg.codeName})";
       CPE_NAME = "cpe:/o:${cfg.vendorId}:${cfg.distroId}:${cfg.release}";
-      LOGO = "nix-snowflake";
+      LOGO = optionalString (cfg.logo != null) cfg.logo;
       HOME_URL = optionalString isNixos "https://nixos.org/";
       VENDOR_URL = optionalString isNixos "https://nixos.org/";
       DOCUMENTATION_URL = optionalString isNixos "https://nixos.org/learn.html";
@@ -42,7 +42,7 @@ let
       VARIANT = optionalString (cfg.variantName != null) cfg.variantName;
       VARIANT_ID = optionalString (cfg.variant_id != null) cfg.variant_id;
       DEFAULT_HOSTNAME = config.networking.fqdnOrHostName;
-      SUPPORT_END = "2025-06-30";
+      SUPPORT_END = cfg.supportEnd;
     };
 
   initrdReleaseContents = (removeAttrs osReleaseContents [ "BUILD_ID" ]) // {
@@ -75,7 +75,7 @@ in
       };
 
       release = mkOption {
-        readOnly = true;
+        internal = true;
         type = types.str;
         default = trivial.release;
         description = "The NixOS release (e.g. `16.03`).";
@@ -96,7 +96,7 @@ in
       };
 
       codeName = mkOption {
-        readOnly = true;
+        internal = true;
         type = types.str;
         default = trivial.codeName;
         description = "The NixOS release code name (e.g. `Emu`).";
@@ -143,6 +143,20 @@ in
         default = "NixOS";
         description = "The name of the operating system vendor";
       };
+
+      logo = mkOption {
+        internal = true;
+        type = types.nullOr types.str;
+        default = "nix-snowflake";
+        description = "The name of an icon that can be used by graphical applications to display the operating system's logo";
+      };
+
+      supportEnd = mkOption {
+        internal = true;
+        type = types.strMatching "[0-9]{4}-[0-9]{2}-[0-9]{2}";
+        default = "2025-06-30";
+        description = "The date when support for this OS version ends.";
+      };
     };
 
     image = {