From b1eabe2b1b14b9b46abc5e2a0e530cf3b4dbf15b Mon Sep 17 00:00:00 2001
From: Nicolas Pierron <nicolas.b.pierron@gmail.com>
Date: Sun, 22 Feb 2009 16:06:42 +0000
Subject: [PATCH] An upstart job to display manual

svn path=/nixos/branches/fix-style/; revision=14158
---
 doc/manual/default.nix  |  6 +--
 system/options.nix      |  1 +
 system/system.nix       |  5 ++-
 upstart-jobs/manual.nix | 87 +++++++++++++++++++++++++++++++++++++++++
 4 files changed, 95 insertions(+), 4 deletions(-)
 create mode 100644 upstart-jobs/manual.nix

diff --git a/doc/manual/default.nix b/doc/manual/default.nix
index 56657aec2e22..c46e89d0fa14 100644
--- a/doc/manual/default.nix
+++ b/doc/manual/default.nix
@@ -1,10 +1,10 @@
-{nixpkgsPath ? ../../../nixpkgs, pkgs ? null}:
+{nixpkgsPath ? ../../../nixpkgs, nixpkgs ? null}:
 
 let
 
-  pkgs = if pkgs == null then 
+  pkgs = if nixpkgs == null then 
     import "${nixpkgsPath}/pkgs/top-level/all-packages.nix" {}
-  else pkgs;
+  else nixpkgs;
 
   options = builtins.toFile "options.xml" (builtins.unsafeDiscardStringContext
     (builtins.toXML (pkgs.lib.optionAttrSetToDocList ""
diff --git a/system/options.nix b/system/options.nix
index dfb1019d864a..f8f07bb4b2fc 100644
--- a/system/options.nix
+++ b/system/options.nix
@@ -2245,6 +2245,7 @@ in
     (import ../upstart-jobs/cron.nix)
     (import ../upstart-jobs/fcron.nix)
     (import ../upstart-jobs/cron/locate.nix)
+    (import ../upstart-jobs/manual.nix)
 
     # fonts
     (import ../system/fonts.nix)
diff --git a/system/system.nix b/system/system.nix
index 78b6a0a6deee..bfa81c5566ad 100644
--- a/system/system.nix
+++ b/system/system.nix
@@ -1,6 +1,7 @@
 { platform ? __currentSystem
 , configuration
 , nixpkgsPath ? ../../nixpkgs
+, nixpkgs ? null
 }:
 
 rec {
@@ -24,7 +25,9 @@ rec {
       pkgs configComponents
       config;
 
-  pkgs = import "${nixpkgsPath}/pkgs/top-level/all-packages.nix" {system = platform;};
+  pkgs = if nixpkgs == null then 
+    import "${nixpkgsPath}/pkgs/top-level/all-packages.nix" {system = platform;}
+  else nixpkgs;
 
   manifests = config.installer.manifests; # exported here because nixos-rebuild uses it
 
diff --git a/upstart-jobs/manual.nix b/upstart-jobs/manual.nix
new file mode 100644
index 000000000000..5d658ce7681a
--- /dev/null
+++ b/upstart-jobs/manual.nix
@@ -0,0 +1,87 @@
+{pkgs, config}: 
+
+# Show the NixOS manual on tty7
+# Originally used only by installation CD
+
+let
+  inherit (pkgs.lib) mkOption;
+  options = {
+    services = {
+      showManual = {
+        enable = mkOption {
+	  default = false;
+	  description = "
+	    Whether to show the NixOS manual on the tty7
+	  ";
+	};
+	ttyNumber = mkOption {
+	  default = "7";
+	  description = "
+	    TTY number name to show the manual on
+	  ";
+	};
+	browserPackage = mkOption {
+	  default = pkgs.w3m;
+	  description = "
+	    Package containing the browser to be used
+	  ";
+	};
+	browserCommand = mkOption {
+	  default = "bin/w3m";
+	  description = "
+	    Command (command path is relative to browserPackage) to run the browser
+	  ";
+	};
+	manualFile = mkOption {
+	  default = null; 
+	  description = "
+	    NixOS manual HTML file
+	  ";
+	};
+      };
+    };
+  };
+
+inherit(pkgs.lib) optional;
+
+inherit (config.services.showManual) enable ttyNumber browserPackage browserCommand 
+  manualFile;
+	  
+realManualFile = if manualFile == null then 
+  (import ../doc/manual {nixpkgs = pkgs;})+"/manual.html"
+else manualFile;
+
+in
+
+{
+  require = [
+    options
+  ];
+
+  boot = {
+    extraTTYs = optional enable ttyNumber;
+  };
+  
+  services = {
+    extraJobs = optional enable {
+      name = "showManual";
+
+      job = ''
+        description "NixOS manual"
+	
+	start on udev
+	stop on shutdown
+	respawn ${browserPackage}/${browserCommand} ${realManualFile} < /dev/tty${toString ttyNumber} > /dev/tty${toString ttyNumber} 2>&1
+      '';
+    };
+    ttyBackgrounds = {
+      specificThemes = optional enable {
+        tty = ttyNumber;
+	theme = pkgs.themes "green";
+      };
+    };
+    mingetty = {
+      helpLine = if enable then "\nPress <Alt-F${toString ttyNumber}> for NixOS manual." else "";
+    };
+  };
+}