1 files changed, 123 insertions, 0 deletions
diff --git a/pkgs/applications/networking/browsers/chromium/update.sh b/pkgs/applications/networking/browsers/chromium/update.sh
new file mode 100755
index 000000000000..e82d22f34fd0
--- /dev/null
+++ b/pkgs/applications/networking/browsers/chromium/update.sh
@@ -0,0 +1,123 @@
+#!/bin/sh
+
+channels_url="http://omahaproxy.appspot.com/all?csv=1";
+history_url="http://omahaproxy.appspot.com/history";
+bucket_url="http://commondatastorage.googleapis.com/chromium-browser-official/";
+base_path="$(cd "$(dirname "$0")" && pwd)/source";
+
+source "$(nix-build --no-out-link "$base_path/update.nix" -A updateHelpers)";
+
+### poor mans key/value-store :-) ###
+
+ver_sha_table=""; # list of version:sha256
+
+sha_lookup()
+{
+    version="$1";
+
+    for ver_sha in $ver_sha_table;
+    do
+        if [ "x${ver_sha%:*}" = "x$version" ];
+        then
+            echo "${ver_sha##*:}";
+            return 0;
+        fi;
+    done;
+
+    return 1;
+}
+
+sha_insert()
+{
+    version="$1";
+    sha256="$2";
+
+    ver_sha_table="$ver_sha_table $version:$sha256";
+}
+
+get_newest_ver()
+{
+    versions="$(for v in $@; do echo "$v"; done)";
+    if oldest="$(echo "$versions" | sort -V 2> /dev/null | tail -n1)";
+    then
+        echo "$oldest";
+    else
+        echo "$versions" | sort -t. -k 1,1n -k 2,2n -k 3,3n -k 4,4n | tail -n1;
+    fi;
+}
+
+fetch_filtered_history()
+{
+    curl -s "$history_url" | sed -nr 's/^'"linux,$1"',([^,]+).*$/\1/p';
+}
+
+get_prev_sha256()
+{
+    channel="$1";
+    current_version="$2";
+
+    for version in $(fetch_filtered_history "$channel");
+    do
+        [ "x$version" = "x$current_version" ] && continue;
+        sha256="$(get_sha256 "$channel" "$version")" || continue;
+        echo "$sha256:$version";
+        return 0;
+    done;
+}
+
+get_channel_exprs()
+{
+    for chline in $1;
+    do
+        channel="${chline%%,*}";
+        version="${chline##*,}";
+
+        echo -n "Checking if sha256 of version $version is cached..." >&2;
+        if sha256="$(sha_lookup "$version")";
+        then
+            echo " yes: $sha256" >&2;
+        else
+            echo " no." >&2;
+            sha256="$(get_sha256 "$channel" "$version")";
+            if [ $? -ne 0 ];
+            then
+                echo "Whoops, failed to fetch $version, trying previous" \
+                     "versions:" >&2;
+
+                sha_ver="$(get_prev_sha256 "$channel" "$version")";
+                sha256="${sha_ver%:*}";
+                version="${sha_ver#*:}";
+            fi;
+        fi;
+
+        sha_insert "$version" "$sha256";
+
+        main="${sha256%%.*}";
+        deb="${sha256#*.}";
+        deb32="${deb%.*}";
+        deb64="${deb#*.}";
+
+        echo "  $channel = {";
+        echo "    version = \"$version\";";
+        echo "    sha256 = \"$main\";";
+        if [ "x${deb#*[a-z0-9].[a-z0-9]}" != "x$deb" ];
+        then
+            echo "    sha256bin32 = \"$deb32\";";
+            echo "    sha256bin64 = \"$deb64\";";
+        fi;
+        echo "  };";
+    done;
+}
+
+cd "$(dirname "$0")";
+
+omaha="$(curl -s "$channels_url")";
+versions="$(echo "$omaha" | sed -nr -e 's/^linux,([^,]+,[^,]+).*$/\1/p')";
+channel_exprs="$(get_channel_exprs "$versions")";
+
+cat > "$base_path/sources.nix" <<-EOF
+# This file is autogenerated from update.sh in the parent directory.
+{
+$channel_exprs
+}
+EOF