creating the rpmrepo metadata

This includes two method for build rpm repo:
  1. create the metadata in rootfs_rpm
  2. standalone binary for building the metadata

Not both of them are needed, generally #2 fits more for the purpose,
but #1 may have its use on rootfs creation using zypper.

Both share some problems and are subjected for future improvement:
  1. the createrepo now builds metadata for the whole directory,
     if there are more than one arch, it builds for all, which means
     rootfs_rpm may run longer if more builds have been run.
  2. createrepo builds metadata for stale rpms

Signed-off-by: Qing He <qing.he@intel.com>

meta/classes/rootfs_rpm.bbclass

@@ -11,6 +11,9 @@ do_rootfs[depends] += "rpm-native:do_populate_sysroot"
 # Needed for update-alternatives
 do_rootfs[depends] += "opkg-native:do_populate_sysroot"
 
+# Creating the repo info in do_rootfs
+do_rootfs[depends] += "createrepo-native:do_populate_sysroot"
+
 do_rootfs[recrdeptask] += "do_package_write_rpm"
 
 AWKPOSTINSTSCRIPT = "${POKYBASE}/scripts/rootfs_rpm-extract-postinst.awk"
@@ -38,6 +41,8 @@ fakeroot rootfs_rpm_do_rootfs () {
 
 	${RPM_PREPROCESS_COMMANDS}
 
+	createrepo "${DEPLOY_DIR_RPM}"
+
 	# Setup base system configuration
 	mkdir -p ${IMAGE_ROOTFS}/etc/rpm/
 

scripts/poky-setup-rpmrepo

@@ -0,0 +1,89 @@
+#!/bin/bash
+#
+# This utility setup the necessary metadata for an rpm repo
+#
+# Copyright (c) 2011 Intel Corp.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+function usage() {
+	echo "Usage: $0 <rpm-dir>"
+	echo "  <rpm-dir>: default is $TPMDIR/deploy/rpm"
+}
+
+if [ $# -gt 1 ]; then
+	usage
+	exit 1
+fi
+
+setup_tmpdir() {
+    if [ -z "$TMPDIR" ]; then
+        if [ "x$BUILDDIR" = "x" -o ! -d "$BUILDDIR/tmp" ]; then
+            # BUILDDIR unset, try and get TMPDIR from bitbake
+            type -P bitbake &>/dev/null || {
+                echo "In order for this script to dynamically infer paths";
+                echo "to kernels or filesystem images, you either need";
+                echo "bitbake in your PATH or to source poky-init-build-env";
+                echo "before running this script" >&2;
+                exit 1; }
+
+            # We have bitbake in PATH, get TMPDIR from bitbake
+            TMPDIR=`bitbake -e | grep TMPDIR=\" | cut -d '=' -f2 | cut -d '"' -f2`
+        else
+            TMPDIR=$BUILDDIR/tmp
+        fi
+    fi
+}
+
+setup_sysroot() {
+	# Toolchain installs set up $POKY_NATIVE_SYSROOT in their
+	# environment script. If that variable isn't set, we're
+	# either in an in-tree poky scenario or the environment
+	# script wasn't source'd.
+	if [ -z "$POKY_NATIVE_SYSROOT" ]; then
+		setup_tmpdir
+		BUILD_ARCH=`uname -m`
+		BUILD_OS=`uname | tr '[A-Z]' '[a-z]'`
+		BUILD_SYS="$BUILD_ARCH-$BUILD_OS"
+
+		POKY_NATIVE_SYSROOT=$TMPDIR/sysroots/$BUILD_SYS
+	fi 
+}
+
+setup_tmpdir
+setup_sysroot
+
+
+if [ -n "$1" ]; then
+	RPM_DIR="$1"
+else
+	RPM_DIR="$TMPDIR/deploy/rpm"
+fi
+
+if [ ! -d "$RPM_DIR" ]; then
+   	echo "Error: rpm dir $RPM_DIR doesn't exist"
+	exit 1
+fi
+
+CREATEREPO=$POKY_NATIVE_SYSROOT/usr/bin/createrepo
+if [ ! -e "$CREATEREPO" ]; then
+   	echo "Error: can't find createrepo binary"
+	echo "please run bitbake createrepo-native first"
+	exit 1
+fi
+
+
+$CREATEREPO "$RPM_DIR"
+
+exit 0