From 54129c440e467160b4b7339d20a9380fa48a017e Mon Sep 17 00:00:00 2001
From: tv <tv@krebsco.de>
Date: Sat, 5 Mar 2016 12:40:20 +0100
Subject: krebs os-release: init

---
 Makefile                      | 11 ++++++++++-
 krebs/3modules/default.nix    |  1 +
 krebs/3modules/os-release.nix | 28 ++++++++++++++++++++++++++++
 3 files changed, 39 insertions(+), 1 deletion(-)
 create mode 100644 krebs/3modules/os-release.nix

diff --git a/Makefile b/Makefile
index 12a60a90..226c0f29 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,12 @@
 stockholm ?= .
 
+export STOCKHOLM_VERSION ?= $(shell \
+	version=git.$$(git describe --always --dirty); \
+	case $$version in (*-dirty) version=$$version@$$(hostname); esac; \
+	date=$$(date +%y.%m); \
+	printf '%s' "$$date.$$version"; \
+)
+
 ifndef nixos-config
 $(if $(system),,$(error unbound variable: system))
 nixos-config = ./$(LOGNAME)/1systems/$(system).nix
@@ -60,7 +67,8 @@ deploy: ssh ?= ssh
 deploy:
 	$(call execute,populate)
 	$(ssh) $(target_user)@$(target_host) -p $(target_port) \
-		nixos-rebuild switch --show-trace -I $(target_path)
+		env STOCKHOLM_VERSION="$$STOCKHOLM_VERSION" \
+			nixos-rebuild switch --show-trace -I $(target_path)
 
 # usage: make LOGNAME=shared system=wolf eval.config.krebs.build.host.name
 eval eval.:;@$(call evaluate,$${expr-eval})
@@ -75,6 +83,7 @@ install:
 	target_path=/mnt$(target_path) $(call execute,populate)
 	$(ssh) $(target_user)@$(target_host) -p $(target_port) \
 		env NIXOS_CONFIG=$(target_path)/nixos-config \
+				STOCKHOLM_VERSION="$$STOCKHOLM_VERSION" \
 			nixos-install
 
 # usage: make test system=foo [target=bar] [method={eval,build}]
diff --git a/krebs/3modules/default.nix b/krebs/3modules/default.nix
index 186469e9..bdd9049c 100644
--- a/krebs/3modules/default.nix
+++ b/krebs/3modules/default.nix
@@ -23,6 +23,7 @@ let
       ./lib.nix
       ./nginx.nix
       ./nixpkgs.nix
+      ./os-release.nix
       ./per-user.nix
       ./Reaktor.nix
       ./realwallpaper.nix
diff --git a/krebs/3modules/os-release.nix b/krebs/3modules/os-release.nix
new file mode 100644
index 00000000..4c803fff
--- /dev/null
+++ b/krebs/3modules/os-release.nix
@@ -0,0 +1,28 @@
+{ config, ... }:
+with config.krebs.lib;
+let
+  nixos-version-id = "${config.system.nixosVersion}";
+  nixos-version = "${nixos-version-id} (${config.system.nixosCodeName})";
+  nixos-pretty-name = "NixOS ${nixos-version}";
+
+  stockholm-version-id = maybeEnv "STOCKHOLM_VERSION" "unknown";
+  stockholm-version = "${stockholm-version-id}";
+  stockholm-pretty-name = "stockholm ${stockholm-version}";
+
+  version = "${stockholm-version}/${nixos-version}";
+  version-id = "${stockholm-version-id}/${nixos-version-id}";
+  pretty-name = "${stockholm-pretty-name} / ${nixos-pretty-name}";
+
+  home-url = http://cgit.cd.krebsco.de/stockholm;
+in
+{
+  # http://0pointer.de/public/systemd-man/os-release.html
+  environment.etc."os-release".text = mkForce ''
+    NAME="stockholm/NixOS"
+    ID=stockholm
+    VERSION="${version}"
+    VERSION_ID="${version-id}"
+    PRETTY_NAME="${pretty-name}"
+    HOME_URL="${home-url}"
+  '';
+}
-- 
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