From d342672f5a962f278f23196800a7d0afbf65c695 Mon Sep 17 00:00:00 2001
From: aszlig <aszlig@redmoonstudios.org>
Date: Fri, 15 Jun 2012 10:23:33 +0200
Subject: [PATCH] chromium: Add an update script.

It fetches the latest version based on the bucketlist XML from
commondatastorage and generates a "source.nix" which contains an attribute set
about where to fetch the latest version.

The XML is parsed in a somewhat hackish way using sed, but as this is just an
updater, its okay and we don't want to break a fly on the wheel by employing a
full XML parser.
---
 .../networking/browsers/chromium/default.nix  |  8 +++--
 .../networking/browsers/chromium/update.sh    | 34 +++++++++++++++++++
 2 files changed, 39 insertions(+), 3 deletions(-)
 create mode 100755 pkgs/applications/networking/browsers/chromium/update.sh

diff --git a/pkgs/applications/networking/browsers/chromium/default.nix b/pkgs/applications/networking/browsers/chromium/default.nix
index af2e23a5407..f5aea590369 100644
--- a/pkgs/applications/networking/browsers/chromium/default.nix
+++ b/pkgs/applications/networking/browsers/chromium/default.nix
@@ -14,6 +14,8 @@
 }:
 
 let
+  sourceInfo = import ./source.nix;
+
   mkGypFlags = with stdenv.lib; let
     sanitize = value:
       if value == true then "1"
@@ -25,11 +27,11 @@ let
 in stdenv.mkDerivation rec {
   name = "chromium-${version}";
 
-  version = "21.0.1171.0";
+  version = sourceInfo.version;
 
   src = fetchurl {
-    url = "http://commondatastorage.googleapis.com/chromium-browser-official/chromium-${version}.tar.bz2";
-    sha256 = "3fd9b2d8895750a4435a585b9c2dc7d34b583c6470ba67eb6ea6c2579f126377";
+    url = sourceInfo.url;
+    sha256 = sourceInfo.sha256;
   };
 
   buildInputs = [
diff --git a/pkgs/applications/networking/browsers/chromium/update.sh b/pkgs/applications/networking/browsers/chromium/update.sh
new file mode 100755
index 00000000000..066cd1c147f
--- /dev/null
+++ b/pkgs/applications/networking/browsers/chromium/update.sh
@@ -0,0 +1,34 @@
+#!/bin/sh
+
+bucket_url="http://commondatastorage.googleapis.com/chromium-browser-official/";
+
+get_newest_version()
+{
+    curl -s "$bucket_url" | sed -ne ' H;/<[Kk][Ee][Yy]>chromium-[^<]*</h;${
+    g;s/^.*<Key>chromium-\([^<.]\+\(\.[^<.]\+\)\+\)\.tar\.bz2<.*$/\1/p
+    }';
+}
+
+cd "$(dirname "$0")";
+
+version="$(get_newest_version)";
+
+if [ -e source.nix ]; then
+    oldver="$(sed -n 's/^ *version *= *"\([^"]\+\)".*$/\1/p' source.nix)";
+    if [ "x$oldver" = "x$version" ]; then
+        echo "Already the newest version: $version" >&2;
+        exit 1;
+    fi;
+fi;
+
+url="${bucket_url%/}/chromium-$version.tar.bz2";
+
+sha256="$(nix-prefetch-url "$url")";
+
+cat > source.nix <<EOF
+{
+  version = "$version";
+  url = "$url";
+  sha256 = "$sha256";
+}
+EOF